Water Management Centre, Marathwada Agricultural University, Parbhani, Maharashtra, 431402.
Field experiment was conducted during 1994–95 and 1995–96 to study the effect of irrigation on crop productivity and soil-plant-water relationship in soybean-rabi sorghum cropping system under different land layouts grown on Parbhani clay soil (Vertisol). It was observed that soybean as well as rabi sorghum significantly responded to irrigation applied at 0.60 IW/CPE, however, there was no significant increase in grain yield of soybean due to ridges and furrows and broad bed and furrow over flat bed. Flat bed cultivation was found significantly superior in increasing grain yield of sorghum over other land layouts. The water use efficiency of soybean was more in broad bed and furrow layout with irrigation at 0.6 IW/CPE, while it was highest with irrigation to sorghum at 0.3 IW/CPE and grown in flat bed. The grain yields of both soybean as well as sorghum showed a negative linear function of seasonal (integrated) plant water stress.
Irrigation, soil-plant-water relations, integrated plant-water stress, soybean-sorghum cropping system
