00799cam a2200241 a 4500 9712200027 DNAL 631 INT 1990 A049 Or. Phosphorus requirements for sustainable agriculture in Asia and Oceania : proceedings of a symposium, 6-10 March 1989 / [Manila? Philippines] : International Rice Research Institute, 1990. xvi, 478 p. : ill. ; 23 cm. Phosphorus in agriculture Phosphorus in agriculture Soils Soils Plants Plants Sustainable agriculture Sustainable agriculture International Rice Research Institute. International Council of Scientific Unions. EK 14279 14279 0 0 0 631_000000000000000_INT_1990_A049_OR 0 66302 LBA LBA A049 2017-10-11 631 INT 1990 A049 Or. A28055 2017-10-11 2017-10-11 EK