Abstract
Changes in chemical properties caused by continuous sugarcane cropping, Saccharum spp. (Poaceae), in a Haplustox (red latosol) soil in the state of Sao Paulo, Brazil, were studied. Two close sites, one covered with a tropical forest and the other cultivated with sugarcane during 30 years, were selected. At each site seven points were sampled at three depths: 0-20, 20-40 and 40-60 cm. Soil pH (CaCl 2 ), organic matter, phosphorus (resin), exchangeable bases (Ca, Mg and K), CEC, base and aluminum saturation were determined. Sugarcane cropping system increased soil pH, base saturation and P, Ca and Mg contents when compared to effects by native vegetation. Cultivation decreased organic matter, free aluminum, CEC and aluminum saturation
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