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High-Yielding Varieties of Rice in the Philippines: Progress of the Seed-Fertilizer Revolution

机译:菲律宾高产水稻品种:种子 - 肥料革命的进展

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About half the lowland rice area in the Philippines was planted to highyielding varieties (HYV's) in crop year 1969/70. The national average yield for all farmers was 1.7 metric tons per hectare. Yields average 20 percent higher for HYV's than for other varieties in the irrigated area and about 10 percent higher in the nonirrigated lowlands. However, one-fifth of the farmers growing HYV's in the irrigated area obtained high yields of more than 3.3 metric tons per hectare, averaging 4.3 tons per hectare.

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