Geostatistics and Sample Density of Chemical Attributes for Soil under Sugarcane and Agroforestry in Humaitá – AM, Brazil

There is a lack of studies focusing on spatial variance chemical attributes in Amazonas, Brazil. The objective this study was to evaluate geo-statistics and sample density soils under sugarcane agroforestry, Humaitá, Amazon state, research carried out the municipality areas were meshes 70 m x regularly spaced by 10 m, with 64 points per area, then soil samples collected layers 0.0-0.2 0.4-0.6 m. We performed analyses proprieties soil. Then, it applied descriptive statistics, techniques based semivariogram coefficient variation range. As result, we observed dependence for most two areas. Based Cline, presented 237 (0.0-0.2 m) 225 (0.4-0.6 m); agroforestry had 356 465 hectare. Yet range density, showed 30 5 m), whereas 23 9 ha.