Variabilidade espacial de propriedades físicas do solo em uma parcela experimental

摘要: Field experiments involving soils require previous verification of the soil spatial variability. The objective this research was to study variability physical properties an experimental plot using geostatistics. experiment conducted in 1982 at Experimental Center Instituto Agronomico Campinas, state Sao Paulo, Brazil, on a Red Latosol (Rhodic Ustox) under conventional tillage 30 x 30 m area, with sampling points arranged 5 m square grid. analyzed were water content, porosity, bulk density, penetration resistance, and retention. evaluated by geostatistical analysis semivariograms kriging interpolation data for construction maps. Spatial dependence occurred mainly variables from upper layer (0-25 cm), showing moderate strong dependence. A significant positive correlation found between retention density. observed similar behavior allowed inference that random would not be enough characterize field, as it fail show In cases where requires independent samples, response treatments affected.