Field experiments were conducted on soybean (var. Col) to study the effect of irrigation regimes, methods of irrigation and stress management practices. In the investigations, data on soil moisture. parameters were recorded. The results revealed that higher available soil moisture (ASM) was noticed when irrigation was given at 0.6 IW/CPE ratio than at 0.40 IW/CPE ratio. Similarly higher ASM was observed under all furrow method and double row furrow method than under alternate furrow method. Application of coirpith at 12.5 t ha was found to increase the ASM whereas, foliar spray of either kaolin or KCI had no influence on the ASM. With regard to moisture depletion pattern, the ASM in the furrow depletes more rapidly during the initial few days after irrigation, irrespective of irrigation regimes. Crop growth and productivity depends, mostly on moisture availability, study on moisture depletion pattern is a useful phenomena in irrigated agriculture.
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Tamil Nadu Agricultural University
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Tamil Nadu, India.
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