Criteria for scheduling the irrigation of mustard (Brassica juncea L.)
1993
Sharma, D.K. | Kumar, A. (G.B. Pant University of Agriculture and Technology, Pantnagar (India))
Field experiments were conducted during two seasons to evaluate criteria for irrigation scheduling of mustard (Brassica juncea L.). The irrigation treatments were applied according to physiological stages or pan evaporation. An increase in the irrigation frequency resulted in greater leaf area index, branches per plant, xylem pressure potential, relative water content, and seed yield of mustard. The evapotranspiration (ET) of the crop increased as the crop season advanced peaking from 30 to 60 days after sowing (DAS). The profile water use and seed yield varied from 24.1 percent to 72.6 percent and from 710 kg/ha to 1378 kg/ha respectively, depending on the irrigation scheduling. The highest obtainable yield of 1529 kg/ha was found to be at an LAI of 7.07 and an ET of 235.02 mm when two irrigations were applied based on pan evaporation. The water use efficiency decreased with increasing ET levels at all LAI. The crop coefficient (Kc) to compute crop water use from pan evaporation varied between 0.19 and 1.14.
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