na INLIS000000000004759 Ind 0010-1118004759 Acid, Sulphate, Soils in the humid tropics: guidelines for soil surveys AGENCY FOR AGRICULTURAL RESEARCH AND DEVELOPMENT Agency for Agricultural Research and Development Jakarta AARD 1992 ix, 141 p.: ill.; 25 cm. ix, 141 p.: ill.; 25 cm. 631.47 SOIL SURVEYS ACID SOILS TROPICS 2366/DOK/96