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Copyright of Revista em Agronegócio e Meio Ambiente is the property of Revista em Agronegocio e Meio Ambiente 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.)

Given the repetitiveness with which satellite images are acquired, it is possible to recognize changes in the landscape of a region in a given period of time by analyzing the extent and type of changes in use. The objective was to statistically evaluate, through descriptive analysis and regression, temporal data on the coverage and use of land in the municipality of Patos-PB obtained by MapBiomas© using a series of 36 years between 1985 and 2020. The statistical treatment was directed to the application of the analyzes of the data using the XLSTAT© Trial. The use of the MapBiomas web application as a tool to analyze the use and land cover provided satisfactory results quickly and accurately. It was observed that there were significant changes in area in the Non-Forest and Agricultural Natural Formation classes, where the greatest deviations occurred. The distribution was not symmetrical, kurtosis indicated a platykurtic distribution, where the greatest variations in amplitude and irregular distribution were in the Non-Forest and Agricultural Natural Formation classes. It could be said that there is agreement between the tests used in this work and the accuracy analysis performed on the images by Mapbiomas. [ABSTRACT FROM AUTHOR]

This study aimed to evaluate and map the potential of agricultural production of cassava using geotechnologies for the basin of the middle course region of Paraíba river. SPRING was used to construct the maps of irrigation potential and water retention capacity of the soils and generate the partial map through matrix crossing. Annual average rainfall data were used to construct the climate condition map. Subsequently, LEGAL was used to generate the agricultural production potential map through matrix crossing between the partial map and the climate scenario map. For cassava crop, the following climatic conditions were found: Full in 13.67% of the basin's total area; Full with prolonged rainy season in 3.55%; Moderate due to water excess was not identified; Moderate due to water deficit in 21.03%; and Unsuitable due to severe water deficit in 61.75%. Regarding the potential of irrigated agricultural production of cassava crop, there was no Very High or High, and it was classified as Medium in 3.19% of the area, Low in 5.09% and Very Low in 91.72%. Therefore, irrigated cassava cultivation is not recommended in the watershed of the region of the middle course of the Paraíba River. [ABSTRACT FROM AUTHOR]

Due to Paraíba having a significant portion of its territory inserted in a semi-arid environment, the use of irrigation emerges as an important technology to increase the production and diversity of agricultural crops. However, the development of sustainable irrigated agriculture requires the availability of land with characteristics favorable to this practice. This work aimed to identify and evaluate the potential for the expansion of irrigation in the region of the middle course of the Paraíba River using geotechnologies. A MapBiomas file for rural areas and settlements was used. Urban areas were identified through a Geoinfo digital file. To classify and map the irrigated areas, data from IBGE was used. In the classification of the current irrigated and fertirrigated area and the additional irrigable area, data from ANA were used. For the elaboration of the maps, the SIG SPRING 5.5 was used and the calculations of the areas were carried out. For this work, irrigated and fertirrigated areas were identified in the municipalities of Boqueirão, Queimadas, Itatuba, Barra de São Miguel, and areas of additional irrigable expansion were identified in the municipalities of Boqueirão and Aroeiras. The agricultural areas identified and mapped represented 21.42% of the productive establishments. In the evaluation, it was found that there was no growth in the irrigated area in the basin between the years 1980 and 2017. The irrigated areas are concentrated around the Bodocongó River, the Paraíba River and close to the Acauã reservoir. In the irrigation expansion potential of additional irrigable, the limiting factors of the soils must be taken into account, and the use of conservation practices must be recommended. [ABSTRACT FROM AUTHOR]

Copyright of Colloquium Agrariae is the property of Asociacao Prudentina de Educacao e Cultura (APEC) 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.)

This study aimed to classify and map information soil of the land the state of Paraíba by crossing information plans using GIS to identify areas favorable to the cultivation of cowpea. The methodology used was the Agricultural Zoning of the State of Paraíba and the digital soil map in a database developed in the SPRING 5.2.2 software where the soil was extracted information from the soil to the key basic formula of usability class land, and elaborated the classification of restrictive factors of salinity, effective depth, stoniness, fertility, erosion, drainability, slope and texture, and created at Legal, a language for the potential classification pedological soil under two management levels (B, C), due to the increase of the limiting factors: very high, high, medium, low and very low. The results showed that with the geoprocessing techniques provides satisfactory results in the spatial distribution of potential areas of cowpea culture; not have been mapped and identified areas with potential Very High for handling B and C due to the higher demand of the cowpea crop; small areas with the possibility of cowpea cultivation were not mapped due to the used working range; this assessment carried out regardless of weather conditions and therefore does not offer, alone, all the necessary elements for sustained exploration of culture; pedological areas with potential for cowpea cultivation increases considerably with the adoption of management C; the greatest potential for pedological cowpea cultivation of the Paraíba state land features in areas consist of Argisols and Latosols; and to a lesser potential Litholic Neosols and Luvisols. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Agricultura Irrigada - RBAI is the property of Revista Brasileira de Agricultura Irrigada - RBAI 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 Revista Brasileira de Agricultura Irrigada - RBAI is the property of Revista Brasileira de Agricultura Irrigada - RBAI 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.)

This study aimed to evaluate the potential of the soil and climate of Paraiba State for agricultural crop of sugar cane. In obtaining the potential maps pedoclimatic the soil potential of information were combined with the climate of aptitude considering three rainfall scenarios: wet years, dry years and regular years. The crossing of the information was performed through geoprocessing techniques using the SPRING software and obtaining maps of soil and climate potential. The result of the interpretations was classified into four pedoclimatic potential classes: Very High, High, Medium, Low and Very Low. Using geoprocessing techniques was possible the spatial areas and defining environments favorable potential of sugar cane culture. Significant differences were observed in the territorial extension of the classes and subclasses of potential soil and climate of the state of Paraiba that showed variations of pedological and climatic order in their territory, influencing the potential soil and climate for the cultivation of sugar cane. The sugar cane cultivation potential is concentrated in the coast state and in the small area in the Brejo region. The potential pedoclimatic Very High was not represented in the mapping due to soil and climatic constraints. The water and pedological requirement for the cultivation of sugar cane restricted planting areas in the state. Could not map smaller areas due to the scale of work, with the possibility of crop cultivation of sugar cane in small areas that were not identified in this work. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Agricultura Irrigada - RBAI is the property of Revista Brasileira de Agricultura Irrigada - RBAI 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 Revista Brasileira de Agricultura Irrigada - RBAI is the property of Revista Brasileira de Agricultura Irrigada - RBAI 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 Revista Brasileira de Agricultura Irrigada - RBAI is the property of Revista Brasileira de Agricultura Irrigada - RBAI 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.)

Agroecology is a set of techniques and concepts, aiming at the production of healthier food, based on an economically viable agriculture, ecologically sustainable, socially just and culturally appropriate. Combine low cost technologies to agroecology is a way to develop agriculture causing it to be less dependent and less costly for the farmer. Thus, the Demonstration Units Pedagogical Family Agriculture (UDPAF) are used in educational way to exchange, training and workshops, for allowing observations, experimentation and collective reflection. The objective of to the article is solidify and disseminate social technologies inexpensive and less dependent on the external system. Three social technologies alternative, geodesic and solar panels have been deployed in the tank UDPAF promoted by the Multidisciplinary Expert Advisory Group on Technology and Extension (AGEMTE), under contract with the National Institute of Colonization and Agrarian Reform (INCRA), with the Program Technical Assistance, Social and Environmental Agrarian Reform (ATES). The implementation process took place in accordance with the capabilities and characteristics of each of the units observing the production cycles, from household food security or interest group for surplus production aiming to generate income. The results showed that: the three technologies presented adapt to family farming have practicability and be inexpensive to implement; families involved will be replicating the theoretical and practical knowledge in the disclosure; that caused the change in behavior of the actors involved, causing interest in low cost social technologies. [ABSTRACT FROM AUTHOR]

Copyright of Revista Caatinga is the property of Revista Caatinga 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.)