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Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Calculating the potential of rural residential consolidation is the basis and key to the establishment of rural residential consolidation projects. However, according to the existing definition and calculation method of rural residential consolidation potential, it cannot measure the transformation potential of dangerous houses and cannot meet the current requirements of rural residential consolidation. To solve these problems, this paper summarized the definitions of rural residential land consolidation potential proposed by domestic scholars in recent years. Based on the definition of rural residential area and rural residential land consolidation, this paper redefined the definition of rural residential land consolidation potential via considering rural building safety. Then, according to the causes of the rural residential hollow in the study area, this paper proposed a method of calculating the consolidation potential based on the classification of rural residential land. The potential of residential consolidation in Xiatujing village can be calculated using this method as an example. The potential of rural residential land consolidation refers to the ability to improve the intensity of rural residential land use and the living and production conditions of rural residents by using engineering technology and adjusting land property rights and other measures, removing and consolidating existing rural residential areas. It includes two parts: The potential of land use spatial expansion and the potential of improving the living conditions of villagers. The former refers to the area of cultivated land and other land that can be increased through rural residential consolidation, while the latter refers to the area of rural residential land that can be improved through rural residential consolidation. This paper proposed the method of calculating the consolidation potential based on the classification of rural residential land. Rural residential land can be divided into three levels. The first level can be divided into five categories according to land use, including residential land, public service land, infrastructure land, industrial land and other construction land. According to the safety of construction facilities, the first four primary land use categories are divided into three secondary categories: Safety, unsafe and lack of use function. And the third level, according to the use status of construction facilities, can be classified into three categories: Use, idle and abandoned. Other construction land will not be divided into second and third levels. The calculation of consolidation potential defined the land of unsafe and lack of use function in second level, unutilized land and corner land in other construction land as the potential of consolidation. The potential that continues to be used as residential land after consolidation was defined as the potential to improve living conditions, while the remaining potential was defined as the potential of land use expansion. According to the difficulty in land consolidation, the land of unsafe and use was defined as the potential of difficult realization, and the remaining potential was defined as the potential of easy realization. With the calculation method of consolidation potential of residential land classification, the consolidation potential of Xiatujing village can be calculated. The results show that the potential of residential consolidation is 10.66 hm2, the potential of improving living conditions is 0.76 hm2, the potential of land use expansion is 9.90 hm2, the potential of easy realization is 8.19 hm2, and the potential of difficult realization is 2.47 hm2.The method of calculating the potential of rural residential consolidation can not only be used to calculate the area of increased cultivated land and other land, but also the area of land used in rural residential transformation. Based on the calculation results of consolidation potential, rural residential can be consolidated to achieve the goal of rural dangerous housing transformation and hollow village consolidation. [ABSTRACT FROM AUTHOR]

Poverty has always been a worldwide problem, especially for developing countries. The agricultural industry poverty alleviation is one of the most effective methods to improve the ability of the poor, improve the livelihood level of the rural family, and achieve sustainable development in the future. With the introduction and implementation of the "precise poverty alleviation concept" by the Chinese government, analyses of whether agricultural industry's precise poverty alleviation can become an effective way to increase the income of the poor or not, determination of what are the leading factors of the spatial and temporal differentiation of agricultural industry poverty alleviation efficiencies, and further scientifically revealing the poverty alleviation efficiency of the agricultural industry and its mechanism are of vital importance. The previous research mainly focuses on the field of economics, however, in this paper, we used innovative analysis for this research problem from a geospatial perspective using Wanzhou District, a national poverty-stricken county in the Southwestern Mountainous Area with a rate of alleviate poverty of 88% from the year 2013 to 2018 under the government program. The main innovations of this paper included that (1) an indicator system was constructed for factors that affected agricultural industry poverty alleviation efficiency based on the spatial perspective, and the industrial poverty alleviation efficiency was measured by the improved DEA efficiency model, spatial autocorrelation Global Moran’s I model and geo-detector; (2) a framework of action mechanisms between dominant influencing factors and industrial poverty alleviation efficiency was established. The spatial and temporal evolution characteristics of agricultural industry poverty alleviation efficiency, and its dominant influencing factors in 41 townships in the study area in 2013, 2015 and 2018 were further analyzed by the natural breakpoint classification method, Moran index, and geo-detector, and (3) a framework of the dominant factors that affected the efficiency of industrial poverty alleviation was set up, which can be conducive to improving China's anti-poverty model and the mechanism of industrial poverty alleviation, and further provided decision-making suggestions to alleviate the multi-dimensional poverty in the rural areas of the southwestern mountainous area. Moreover, the data in this paper were collected from the Chinese agricultural sector, the township government departments, the poverty alleviation office and the national land department, which was really reliable, the software such as SPSS 25.0，Arcgis10.2 and GeoDa095 were used for analysis. The main conclusions and policy recommendations of this paper were, (1) the industrial poverty alleviation policy had effectively promoted the overall increase in the poverty alleviation efficiency of the county industry in the southwestern mountainous area. Its policy intervention had a positive effect on promoting the poverty alleviation of the poor, the longer the intervention time, the more obvious the efficiency of industrial poverty alleviation, especially in deep poverty towns. (2) The industrial poverty alleviation efficiency showed obvious high-value clusters and low-value clusters. The high-value gathering area was located in the flat dam area along the Yangtze River with abundant water resources and flat terrain. The low-value gathering area was concentrated in the high-altitude mountainous area with a steep slope. (3) The substitution of family and economic factors by policy factors and social factors had become the two main types of factors affecting the efficiency of industrial poverty alleviation in Wanzhou District, and the influence of policy factors was greater than that of social factors. Specifically, with the continuous implementation of the precise poverty alleviation policy, the five major social factors of road density, characteristic planting, labor skill training, agricultural insurance and poverty alleviation credit funds, market participation and human resources level gradually replaced the family economy factor, and became the leading influencing factors for the poverty alleviation efficiency. Finally, this paper offers several feasible suggestions for policy direction and future research according to the research results. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A reasonable cultivated land quality evaluation system reflects the spatial difference of cultivated land quality better and benefits the protection and management of cultivated land. This paper aims to build a more convenient evaluation system of cultivated land quality for acquisition of the quality distribution of cultivated land in provincial level. The system of agricultural land gradation is widely used for evaluation of cultivated land quality in China. But its poor index comparison and shortage of engineering factors are disadvantages for current management of cultivated land resources. Therefore, based on the existing idea and method of agricultural land gradation, this study suggested an improved evaluation system called the hierarchical control method and took Neiqiu County, Hebei Province as a case study. This paper attempted to establish an evaluation system byconsidering cropping system as control factor to characterize the climate effects, land conditions and engineering conditions as the evaluation positive factors, and limiting conditions as the evaluation negative factors. Based on the evaluation system, this paper built three-dimensional Rubik’s cube model for querying results. Then, this paper evaluated the quality of cultivated land in Neiqiu based on the hierarchical control method. The quality of cultivated land in Neiqiu was divided into 5 grades and the areas of Grade 1, 2, 3, 4, and 5 were 9681.30, 11708.28, 6739.46, 2112.59, and 123.55 hm2, respectively, accounting for 31.88%, 38.56%, 22.19%, 6.96%, and 0.41% of the total cultivated land area, respectively. For proving the rationality of the evaluation results of hierarchical control method, this paper compared the results differences between hierarchical control method and factor method onagricultural land quality. The study shows that: 1) Compared with the traditional evaluation system, the system of hierarchical control method has not only the large spatial scale control by cropping system, but also the fine spatial scale evaluation factors. Meanwhile, the considered factors are uniform so it is comparable in provincial scale. Hierarchical setting of evaluation system is convenient to operate. Also, the three-dimensional Rubik’s cube model is easy to inquire the grade of cultivated land quality. 2) Compared to the system of agricultural land gradation, the hierarchical control method considers and highlights the influence of engineering factors (guaranteed rate of irrigation, drainage condition, infrastructure area percentage, and road accessibility) on the quality of cultivated land. Meanwhile, the percentage of cultivated land area at each grade is symmetrical in the matrix form. The grade of cultivated land is mainly distributed on the axis of symmetry. Compared with the factor method, it is found that the trend of the area distribution of cultivated land for the 2 methods is similar in town level, but the area proportion is different. 3) The differences of the influence degree of different factors on the quality of cultivated land need to be further studied. The results can provide some basis for land consolidation, cultivated land requisition-compensation balance, basic farmland protection and other relevant land management work. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Remote sensing image classification is the main approach for rapidly obtaining regional land use/cover information and it has always been an important part in the field of remote sensing. How to improve the classification accuracy of remote sensing images is an urgent problem to be solved in remote sensing research. In traditional classification, only the spectral features of remote sensing image are used, while the texture and other features are ignored. Therefore, it is very common to see the object confusion in the classification result. In this paper, we took the Shijiazhuang Landsat 8 OLI remote sensing image data as the research area, and systematically studied object-oriented classification based on the spatial texture features of remote sensing images. Firstly, Gray Level Co-occurrence Matrix (GLCM) texture features and Gist texture features based on Gabor filter were compared and analyzed. The average J-M distance method was used to evaluate the sample separability and to choose optimal texture features of GLCM. Subsequently, the optimum index factor (OIF) was applied to obtain the best combination of the two texture features. Secondly, the segmentation scale of object-oriented classification was studied in detail, meanwhile, the concept of “the optimal overall segmentation scale” was proposed, which was based on the ratio between maximum area and the number of the objects in classification result. Finally, two object-oriented classification methods, K-Nearest Neighbor (KNN) method and Support Vector Machine (SVM) method, were used to classify the texture data and the original data, and the accuracy of assessment results were compared using three traditional supervised classification methods. The results indicated that the fusion of texture features could improve the accuracy of classification to some extent. The overall classification accuracy based on texture data using object-oriented SVM and object-oriented KNN increased by 3.67 and 3.33 percentage points, respectively, compared with the results based on original data. Object-oriented SVM method based on texture data had the highest classification accuracy with overall classification accuracy of 85.67%, and with Kappa index of 0.81. Although the classification accuracy of the texture-based supervised classification was improved compared with the supervised classification based on original data, the accuracy was far lower than the value with object-oriented method. For original data, the overall classification accuracy of object-oriented KNN increased by 4.33%, 3.99% and 2.00%, respectively, compared with Maximum Likelihood Classification (MLC), Mahalanobis Distance Classification (MDC) and SVM method. The overall classification accuracy of object-oriented SVM increased by 8.33%, 7.99% and 6.00%, respectively, compared with three supervised methods. After fusing Gist texture features, the overall classification accuracy of object-oriented KNN had increased by 6.33%, 4.66% and 2.66% respectively compared with MLC, MDC and SVM. Whereas the overall classification accuracy of object-oriented SVM increased by 10.67%, 9% and 7.00%, respectively, compared with three supervised methods. Object-oriented SVM method is more sensitive to texture features with the maximum increase of classification accuracy. In future study, more texture features need to be considered to extend the application range of remote sensing classification. In summary, the texture feature has positive effect on improving the accuracy of remote sensing classification, and the application of Gist textures have great potential in object-oriented classification. Moreover, it can also be found that object-oriented method is suitable for classifying medium resolution remote sensing image. The research method in this paper not only gives a valuable reference for other kinds of remote sensing images, but also provides an effective approach for the extraction of regional land use/cover information. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Xiong'an New Area was set up on April 1, 2017 and became a hot spot for scholars. This research aimed to distinguish the spatial distribution characteristics of cultivated land quality gradation in the Xiong'an New Area, to provide the scientific basis for construction land selection. This paper discussed the spatial distribution characteristics of cultivated land quality gradation, and analyzed the characteristics and average grade of cultivated land quality at different spatial scales, as well as the spatial agglomeration characteristics of cultivated land quality gradation, on the basis of cultivated land quality gradation complement results and land use change database, using spatial statistical analysis of ArcGIS, area-weighted average method, mean dichotomy method, and partial autocorrelation method, and as a basis for the zoning of cultivated land occupied by construction land. The agricultural acreage of Xiong'an New Area was 88 894.63 hm2. This research showed that the quality of cultivated land in the New Area was distributed from Grade 6 to Grade 14, and the average grade was 9.42, slightly higher than that in Hebei Province. Deviation value of cultivated land was from -3.42 to 4.58, with the lower dispersion in north and east part and higher dispersion in central and south part of the New Area. Cultivated land quality showed the high positive correlation in spatial distribution, LL type (Higher aggregation type) was distributed in the northeast and southwest, and HH type (lower aggregation type) was distributed in the northwestern, eastern and southern parts of the region. There was no obvious concentration area of HL and LH type (negative correlation type). Based on the results of local spatial autocorrelation, the occupancy rule of arable land by construction land was made, and the priority occupancy area, reserved occupancy area, maintained area of cultivated land, and river system regulation and control area were delimited, which were the recommended cultivated land occupied by construction land. The quality grade of cultivated land in the priority occupancy area was from 10 to 14, with the area of 40 981.03 hm2, occupying 26.4% of the total area, mainly distributed in the northern part of the New Area, closer to Rongcheng and Xiongzhou Town. The quality grade of cultivated land in the reserved occupancy area was from 9 to 11, with the area of 57 304.07 hm2, occupying 36.92% of the total area. The quality of cultivated land in the maintained area of cultivated land was from 6 to 9, with an area of 39 008.29 hm2, occupying 25.13% of the whole area, mainly distributed in the northeast and south of the New Area. The river system regulation and control areas were mainly distributed around the Baiyang Lake, occupying 11.55% of the total area. Through the rationality analysis, the recommended partition result is considered to be credible. Based on these results, the paper suggests that the low grade cultivated land should be occupied in priority, and the high grade cultivated land should be protected. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Highest yield and highest ratio of yield to cost are 2 important parameters in agricultural land quality grade. The procedures of agricultural land quality classification (GBT28407-2012) points out that the highest yield should be investigated and determined by the land administrative departments of the provinces according to the specified crop species in standard farming system, and the maximum highest ratio of yield to cost for the specified crop species in the partitions of provinces should be determined by the relevant experts. Due to the lack of scientific basis, the determination of highest yield and highest ratio of yield to cost was subjective and random, which affects the comparability, scientificity and rationality of agricultural land quality grade results. In this paper, we applied wheat input-output survey data of farmland in Henan Province, and divided the data into 2 parts, one for research and the other for verifying the research results, after eliminating abnormal sample data. Based on the theory of land diminishing returns, the wheat per unit yield and per unit input of the agricultural land quality grade were used as the total yield and the total input of the land diminishing returns curve respectively, and accordingly the average yield had the same meaning as the production-cost index. Then the relationships among unit yield, production-cost index and marginal yield of diminishing returns curves were used to determine the highest yield and the highest ratio of yield to cost. The paper concluded that the theoretical conditions for achieving the highest yield and the highest ratio of yield to cost were as follows: In the complete marginal yield diminishing returns curves, the intersection point of the marginal yield curve and the X axis was the highest yield; in the incomplete marginal yield diminishing returns curves, the right end of the yield curve was the highest yield; the intersection point of the production-cost index curve and the marginal yield curves was the highest ratio of yield to cost. A correction method for the abnormal production-cost index was also proposed in this paper. In the incomplete marginal yield diminishing returns curves we obtained, the highest yield of wheat was 8 850 kg/hm2, 2.16% lower than the highest yield of 9 041 kg/hm2 obtained from the yield curve trend extrapolation theory, showing that they were very close. Compared with the original highest yield of 9 400 kg/hm2, the space transition characteristics of wheat land use coefficient of equivalent area obtained by using the new highest yield calculation method could be showed better, the spatial differentiation of the coefficient was more in line with the actual production, and the correlation degree between new wheat utilization class index calculated at provincial level and validation sample yield was higher; compared with the original highest ratio of yield to cost of 3.70 kg/yuan, the highest ratio of yield to cost determined in this study was 2.00 kg/yuan according to the wheat price at the time, which conformed more to the local wheat gains at the time. The results showed that calculation method of the highest yield and the highest ratio of yield to cost was scientific and feasible. The determined highest yield had corresponding funding support and the determined highest ratio of yield to cost had economic significance and practical value. The results verified that "high land yield doesn't always mean high production-cost index". The research provides scientific basis for calculating the abnormal production-cost index, enriches the connotation of the utilization coefficient and the economic coefficient, and improves the compatibility, rationality and scientificity of the agricultural land utilization grade and the economy grade results. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)