na INLIS000000000002276 0010-0124001962 The International Network on Soil Fertility and Fertilizer Evaluation for Rice [INSFFER] The International Rice Reseasrch Institute; The International Fertilizer Development Center and The Swiss Development Cooperation THE INTERNATIONAL RICE RESEARCH INSTITUTE Manila, Philippines IRRI 1987 26 p.; ills. ; 23 cm. 633.18 INT i RICE SOIL FERTILITY FERTILIZERS ORGANIZATION OF RESEARCH INSFFER IRRI. 145/1997