Sustainable Use of Land and Water Under Rainfed and Deficit Irrigation Conditions in Ogun-Osun River Basin,...

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Omotayo Babawande Adeboye

Sustainable Use of Land and Water Under Rainfed and Deficit Irrigation Conditions in Ogun-Osun River Basin, Nigeria

Omotayo Babawande Adeboye

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English

CRC Press
27 September 2018

Irrigation; Sustainable agriculture

Series: IHE Delft PhD Thesis Series

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.

By: Omotayo Babawande Adeboye
Imprint: CRC Press
Country of Publication: United Kingdom
Dimensions: Height: 246mm, Width: 174mm,
Weight: 453g
ISBN: 9781138381650
ISBN 10: 1138381659
Series: IHE Delft PhD Thesis Series
Pages: 264
Publication Date: 27 September 2018
Audience: College/higher education , Further / Higher Education
Format: Hardback
Publisher's Status: Active

The author had Masters of Engineering (M.Eng) Degree in Agricultural Engineering at the Federal University of Technology, Akure, Nigeria. He specialises in Soil and Water Resources Engineering. He is a member of the Nigerian Institution of Agricultural Engineers (NIAE), Nigerian Society of Engineers (NSE) and registered with the Council for the Regulation of Engineering in Nigeria (COREN). He is currently a lecturer at the Department of Agricultural and Environmental Engineering, Obafemi Awolowo University, Nigeria. His research interests are: Agricultural water management at field and basin scales; Land and Water Development; Development of Crop yield models and effects of climate change land and water interactions. He was offered a financial assistance under the Netherlands Fellowship Program (NFP) to undertake his doctoral degree programme in Land and Water Development at UNESCO-IHE Institute For Water Education, Delft, the Netherlands. This research was undertaken in order to examine the possibilities of increasing land and water productivity of Soybeans under rainfed and irrigated agriculture on a sustainable basis at basin scale. Field trials were undertaken and data were collected during two rainy seasons and two dry seasons under sub-humid agro-ecological conditions in Ile-Ife, Nigeria. Results indicate that conservation of water water plus standard agronomic practices have the potential of increasing land and water productivity of Soybeans. Skipping of irrigation for seven days every other week during the seed filling should be avoided in order to avoid reductions in productivity. Large scale production of Soybeans using drip irrigation is not economically sustainable for peasant farmers who are the predominant crop growers in Ile-Ife and other developing countries in Sub-Saharan Africa. Modelling the growth and productivity of Soybeans using the AquaCrop model will help in managing water resources for agriculture under changes in climate conditions. This book is therefore recommended for undergraduate and graduate students in agronomy, irrigation engineering, water management, policy and decision makers in agricultural water management at field level and basin scale.