The soil was 89.2% sand, 6% clay and 4.8% silt, slightly acidic (pH 5.9) and with a total N content of 0.07%. Available phosphorous was 7.92 mg kg-1 and exchangeable potassium was 0.17 mg kg1. Contents of Ca, Na and Mg were 0.63, 0.04 and 0.42 mg kg-1, respectively, and exchangeable acidity was 0.12 mg kg-1 (Table 1).