SOIL ORGANIC MATTER FRACTIONS AND MULTIVARIATE ANALYSIS IN THE DEFINITION OF PASTURE MANAGEMENT ZONES

The use of Precision Agriculture tools and soil attributes has contributed to local agricultural management in the identification different productive potentials quality pastures. present study aimed investigate spatial variability organic matter fractions chemical physical delineate zones pasture soils cultivated under tropical conditions. was conducted on a hay production farm located Seropédica, Brazil. Fifty points were collected irregular grid samples taken at depths 0-0.20 0.20-0.40 m crop productivity evaluated. Chemical fractionation performed obtain data fulvic acid, humic humin fractions, mineral-associated particulate carbon, light matter. Geostatistics multivariate analysis (principal component k-means clustering) define zones. results obtained division area into two regions that can be managed ways aiming increase localized manner with possibility reducing inputs directed respects potential farm.