Hillslope curvature, clay mineralogy, and phosphorus adsorption in an Alfisol cultivated with sugarcane

摘要: Hillslope curvatures are associated with specific environments that correlate to chemical and mineralogical attributes of soil, so determining management zones. Phosphorus is one the main limiting factors development longevity sugarcane. The type constitution clay fraction play an important role in phosphorus (P) adsorption soil. High proportion gibbsite (Gb) soil may be major responsible for P adsorption. relationships among spatial variability as a function hillslope curvature, kaolinite (Kt) Gb, were evaluated Alfisol cultivated Two plots 1 ha concave convex area selected 121 samples collected each area. maximum was determined six taken randomly Data submitted descriptive statistical geostatistical analysis. lowest average values available found In this area, gibbsite, expressed by ratio [Gb/(Gb + Ct)] capacity higher than