Rice and problem soils in the Philippines and the humid tropics: past development and strategies for the 21st century
1990
Lantin, R.S. | Quijano, C.C. | Reyes, R.Y. | Neue, H.U. (International Rice Research Inst., Los Banos, Laguna (Philippines). Soil and Water Sciences Div.)
In the Philippines, rice production is limited by soil problems which include toxicities namely salinity, acid sulfate soil conditions and excess organic matter. Cultivated rice further suffers from deficiencies of nitrogen, phosphorus, zinc, sulfur, and iron. Strategies to overcome soil constraints include water and nutrient management and breeding for soil stress tolerance. Use of IR cultivars give a yield advantage of about 2 t/ha over non-adapted varieties. On moderately affected soils the use of tolerant cultivars minimizes costly amendments.
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