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Spatial Variability Index Based On Soil Properties for Notill and Pasture Site-Specific Management in Brazil.
1R. P. de Oliveira, 2A. C. Bernardi, 3V. D. Benites, 3L. M. Rabello, 1R. Y. Inamassu
1. Embrapa Soil
2. Embrapa Cattle-Southeast
3. Embrapa Instrumentation
 Quantitative characterization of soil properties spatial variation has first been applied in Brazil using the opportunity index for the Precision Agriculture (PA) adoption. Preliminary index results from four Brazilian research-plots are introduced, in a stepwise process to adapt methods and protocols for different production systems. The model applied uses semi-variogram parameters to quantify the magnitude and the structure of soil properties variation. An electrode-coulter-based sensor was used to map continuous in three no-tillage crop production systems and one pasture system. Results of these different fields and soil depths have fit typical index values and soil variations as previously observed, suggesting that indices could indicate adoption potential with further model calibration for different nutrient management practices.
Keyword: spatial variability, opportunity index, soil apparent electrical conductivity
R. P. De oliveira    A. C. Bernardi    V. D. Benites    L. M. Rabello    R. Y. Inamassu    Spatial Variability in Crop, Soil and Natural Resources    Poster    2012
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