Search

The main land use and land cover (LULC) changes that a given area passes over the time can be evaluated by using spatial-temporal analysis of satellites images. Then, it is possible to identify the LULC changes, as well as the main causes of environmental impacts. The objective of this paper was to analyze the LULC changes of the main agricultural lands cultivated in the Alto Paraguai Basin (BAP). This paper focused on the summer crops (soybean and corn) and the analysis of agricultural expansion. The results, considering a16-year comparison, showed an increase of 40.60% in the expansion of agricultural areas. The evaluation of the accuracy showed the efficiency of the methodology of agricultural mapping, presenting a Kappa Index of 0.85 for the 2000/2001 and 0.86 for the 2015/2016 crop seasons. [ABSTRACT FROM AUTHOR]

The state of Paraná is one of the largest corn producers in Brazil, cultivating in two growing seasons. This study evaluated bivariate correlations between precipitation and the second-crop corn yield between the first 10 days of April and the first 10 days of October using spatial statistics. The spatial analysis of yield was evaluated using geostatistical models and validated by cross-validation. Spatial analysis was performed using the local indicator of spatial association and a cross-semivariogram, and the co-dispersion coefficient was used to validate the correlation between variables. Cross-validation identified the exponential model as the best fit, indicating a spatial dependence of 317.26 km. Spatial associations between municipalities were significant throughout the state of Paraná, Brazil. The cross-semivariogram allowed fitting the wave, spherical, Gaussian, and exponential models, with a spatial correlation of 37.04 to 570.38 km between the precipitations and yield. Moreover, the co-dispersion coefficient validated the correlation between the two variables for all 10-day periods. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • Swine and poultry agroindustry consume a lot of thermal energy in their process. • Eucalyptus woodchip is widely used in Brazil to supply this energy demand. • In the IPF it is possible to have livestock and chip production in the same land. • With a GIS the potential of chip production in IPF in western Paraná was estimated. • 4.24% of the pasture area in IPF supplies the woodchip demand of agroindustry's. Abstract The increase in the world population has caused a rise in the demand for animal protein, particularly that of swine and poultry. Brazil is among the world's largest producers of these two commodities, with the western region of Paraná accounting for a significant fraction of this production. To industrialize this raw material requires a large amount of energy, and much of this demand is supplied by eucalyptus biomass in the form of woodchips originating from distant regions, which increases the cost of production. The Livestock-Forestry Integration (LFI) system, which is encouraged by the national government program of Low Carbon Agriculture (LCA), is a eucalyptus production system that is growing in Brazil. In the Western region of Paraná, there is widespread availability of pasture areas which could be used to produce eucalyptus in this type of system, and meet the biomass demand of agroindustries. The objective of this work was to explore the expansion of eucalyptus plantations under an LFI scenario for agroindustries in Western Paraná, Brazil. In addition to estimating the area with the potential for expansion of agriculture by means of Landsat-8 satellite images, digital elevation models integrated with the Geographic Information System geoprocessing and the software ArcGIS were used. It was found that conversion of 4.24% of the pasture areas into LFI would meet the current demand for woodchips of the agroindustries that slaughter poultry and swine in Western Paraná. Using 8.04% would satisfy the demand until 2025. It was verified that there are 3972.10 km2 available for expansion of agriculture in the region. The methodology used here serves as a reference for future work. [ABSTRACT FROM AUTHOR]

Several colonisation projects were implemented in the Brazilian Legal Amazon in the 1970s and 1980s. Among these colonisation projects, the most prominent were those with the "fishbone" and "topographic" models. Within this scope, the settlements known as Anari and Machadinho stand out because they are contiguous areas with different models and structures of occupation and colonisation. The main objective of this work was to evaluate the dynamics of Land-Use and Land-Cover (LULC) in two different colonisation models, implanted in the State of Rondônia in the 1980s. The fishbone and topographic or Disorganised Multidirectional models were implemented in the Anari and Machadinho settlements, respectively. A 36-year time series of Landsat images (1984–2020) was used to evaluate the rates and trends in the LULC process in the different colonisation models. In the analysed models, a rapid loss of primary and secondary forests (anthropized areas) was observed, mainly due to the dynamics of its use, established by the Agriculture/Pasture relation with a heavy dependence on road construction. Understanding these two forms of occupation can help the future programs and guidelines of the Brazilian Legal Amazon and any tropical rainforest across the globe. [ABSTRACT FROM AUTHOR]