Abstract:In Nigeria and In some other tropical countries routine soil testing is at Its infancy, therefore research into handling and processing techniques Is very essential.For the Investigation being reported, thirty surface (0-15cm) soils having different cropping histories and variable levels of P were collected from different ecological zones of South Western Nigeria and the following techniques using Bray's P) and NH 4 F.HF solutions were investigated; shaking time, type of shaker, length of shaking, positioning … Show more
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