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Effect of soil drought at different physiological growth stages on yield and water requirement of upland, direct seeded rice



Effect of soil drought at different physiological growth stages on yield and water requirement of upland, direct seeded rice



Oryza 11(2): 81-86



3 rice cultivars sown directly on sandy loam soil were subjected to drought (irrigation at 0.5 atm soil moisture tension) of varying lengths at different growth stages. Drought for 25 days during seedling emergence to tiller initiation had no appreciable adverse effect on paddy yields, although it decreased plant height and straw yields; it reduced water requirements by 27-30%, compared with no drought at any stage. Drought during the flowering stage produced greatest reduction in yields.

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