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A study was conducted in three wet inland valley bottoms, namely, high (MHW), medium (MMW) and low (MLW) watertable sites to evaluate the effect of drained (D) and control (Do), and mound-tillage (MT), ridge-tillage (RT) and no-tillage (NT) treatments on watertable depth and yield of maize in 1990 wet and 1990/1991 dry season in southwestern Nigeria. The watertable depth averaged 30.0cm in the drained...
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