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Journal of Biological Sciences
Year: 2001  |  Volume: 1  |  Issue: 5  |  Page No.: 361 - 362

Yield and Water Use Efficiency of Sunflower Crop under Moisture Depletions and Bed Shapes in Saline Soil

F.C. Oad, A. Soomro, N.L. Oad, Z.A. Abro, M.A. Issani and A.W. Gandahi    

Abstract: The textural class of soil was identified as clay loam and silty clay at 15-90 cm and 0-30 cm soil depths respectively. The chemical analysis of the soil showed ECe=4.43 dS/m, pH=8.20, SAR=8.33 and ESP=9.93. The planting of sunflower H0-1 was done on V-shaped furrows and flat beds; tested under varying moisture depletions. The maximum and satisfactory seed yield (2560 kg ha–1) was observed in the V-shaped furrows irrigated at 50% soil moisture depletion (SMD) followed by 70% SMD. However, excess water at the level of 30% SMD and stress conditions (90% SMD) exhibited very low yields. Water use efficiency (85.41 kg ha–1 cm–1) was also high in V-shaped furrow beds irrigated at 50% SMD. Thus, for saline soils it is recommended that sunflower must be planted on furrows and water should be applied at the rate of 50% soil moisture depletion level (SMD) for maximum water use efficiency and satisfactory sunflower seed yields.

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