PJB-1999-53
STUDIES ON THE MASHBEAN (VIGNA MUNGO) IN RAINFED AGRO-ECOSYSTEM
MUHAMMAD ASLAM, N .I. HASHMI AND ALAN. R.A. STAPLETON*
Abstract
On a loam soil having pH of 8.0., water requirements, dry matter accumulation, yield performance, water use efficiency (WUE) and economics of mashbean (Vigna mungo) were studied during kharif 1992 and 1993, at the National Agricultural Research Centre, Islamabad. Water requirement for mashbean growth cycle varied depending upon season, potential evapotranspiration (ETo) and crop coefficients. It ranged from 332.8 mm to 357.8 mm from sowing upto its maturity during 1992 and 1993, respectively. Overall under agroecosystem of Islamabad, rainfall was surplus than water requirements of mashbean. Dry matter (DM) accumulation vs days after planting (DAP), showed sigmoid response curve, Maximum crop growth rates were 15.8 g m-2 d-1from 50 DAP to 79 DAP during 1992 and 21.4 g m-2d-1 from 58 DAP to 77 DAP during 1993, Mashbean produced seed yield of 1147 kg ha-1 (Average of two seasons). Mean water use effeciency of both seasons was 3.4 kg/ha/mm. Net monetary benefits of Rs. 5788 per hectare could be obtained by sowing mash bean under rainfed ecology.
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