00751cam a2200217 a 4500020001500000040000900015082002600024245012500050260007500175300003400250650003000284650003000314650001000344650001000354650001100364650001100375650002800386650002800414710004300442710004800485  a9712200027  cDNAL  a631 INT 1990 A049 Or.00aPhosphorus requirements for sustainable agriculture in Asia and Oceania :bproceedings of a symposium, 6-10 March 1989 /  a[Manila? Philippines] :bInternational Rice Research Institute,c1990.  axvi, 478 p. :bill. ;c23 cm. 0aPhosphorus in agriculture 0aPhosphorus in agriculture 0aSoils 0aSoils 0aPlants 0aPlants 0aSustainable agriculture 0aSustainable agriculture2 aInternational Rice Research Institute.2 aInternational Council of Scientific Unions.