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Sustainable Use of Land and Water Under Rainfed and Deficit Irrigation Conditions in Ogun-Osun River Basin, Nigeria (Hardcover)
Loot Price: R3,543
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Sustainable Use of Land and Water Under Rainfed and Deficit Irrigation Conditions in Ogun-Osun River Basin, Nigeria (Hardcover)
Series: IHE Delft PhD Thesis Series
Expected to ship within 12 - 17 working days
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Fluctuation in rainfall in Ogun-Osun River Basin, Nigeria in the
recent times is a challenge to crop production. Therefore,
agronomic practices need to be designed to improve water
productivity under rainfed conditions. Improving water productivity
requires vapour shift or transfer whereby soil physical conditions,
soil fertility, crop varieties and agronomy are applied in tandem
and managed to shift the evaporation into useful transpiration by
plants. Water conservation practices: Tied ridge, Mulch, Soil bund,
Tied ridge plus Soil bund, Tied ridge plus Mulch, Mulch plus Soil
bund and Direct sowing were used in cultivating Soybeans for two
rainy seasons in Ile-Ife, Nigeria. Full and deficit irrigation
application during reproductive stages were used with in-line drip
irrigation for two seasons. Seasonal rainfall influenced the water
storage in the soil. Transpiration, seed yield and water
productivity were related to Total Intercepted Photosynthetically
Active Radiation. Yield and economic productivity increased under
water conservation practices. Productivity decreased most when
irrigation was skipped during seed filling and the production costs
under drip system are high. Rainfed cultivation of soybeans when
rainfall and solar radiation are optimum, is the best option. The
AquaCrop model was calibrated and validated to predict canopy
cover, aerial dry biomass, seed yield, soil water content, crop
water use, and water productivity under full and deficit irrigation
conditions. The model performed the best in simulating aerial dry
biomass under full irrigation. The simulated and measured data
compare adequately and the performance of the model was
satisfactory.
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