Spatial Variability of the Organic Matter in the Soil in Cassava Cultivation Under Differentiated Management

The management of soil organic matter (SOM) is fundamental in agriculture for conservation and crop yields. However, addition the being dynamics, it heterogeneous, therefore, understanding spatial variability SOM essential. main objective this study was to evaluate a cassava cultivation under different management, seeking classify its dependence by geostatistics. A filed experiment conducted out on classified as oxisol with four systems: irrigation (micro sprinkler, drip no irrigation), spacing (1.0 × 0.8 m, 1.0 m 1.5 m), weed control (manual control) acidity correction (limestone withouth limestone), totaling 36 experimental plots. To determine SOM, wet oxidation method used, semivariograms were generated GS+® software. effect systems evaluated at depth 0.0-0.2 m. theoretical semivariogram model that best fitted Gaussian model, well-defined level, also expressing condition data stationarity. strong and, through thematic map from kriging, possible observe content zones. use geostatistics techniques provided important information distribution matter.