Effects of irrigation scheduled according to water use factors on soil moisture content and consumptive use of water by wheat triticum aestivum cultivar ni 747 19

Lad, S.L.; Kalbhor, P.N.

Journal​ ​of​ ​Maharashtra​ ​Agricultural​ ​Universities 2(2): 127-134

1977


ISSN/ISBN: 0378-2395
Accession: 005310706

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Abstract
The average soil moisture percentage in 0-60 cm soil layer 24 h before irrigation was above the permanent wilting point. Moisture percentage 72 h after irrigation was either slightly higher or at about the field capacity. Total consumptive use of water increased with the increase in the number of irrigations from 5 to 7. Total and daily consumptive use of water between 2 irrigations was low during early growth stages of the crop and maximum at maturity. The relative evapotranspiration rate (Et/Eo [evapotranspiration rate/evaporation rate]) during the period from 1st irrigation to maturity increased with the increase in the number of irrigations. The mean relative evapotranspiration rates were twice the respective values for water use factors. The consumptive use of water and pan evaporation were significantly correlated with each other during 1970-71. Correlation coefficients between average daily consumptive use of water and pan evaporation were significant and positive. Computed evapotranspiration and net irrigation requirements showed that the peak period of consumptive use (Et) and net irrigation requirements of Nov. sown wheat were in Dec. and Jan., and that of Oct. sown wheat were in Dec. The computed consumptive use and net irrigation requirement of wheat were low during early growth period and decreased from Feb. and Jan. onwards.