Timing of Phosphorus Fertilizer Application on Cowpea (Vigna unguiculata(L.) Walp.) For Increased Productivity in the Forest-Transition Zone

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Timing of Phosphorus Fertilizer Application on Cowpea (Vigna unguiculata(L.) Walp.) For Increased Productivity in the Forest-Transition Zone

Abstract

This study was undertaken to estimate the period of the crop growth or weeks after planting (wap) at which P fertilizer should be applied for maximum productivity of cowpea (Vignaunguiculata (L.) Walp.) crop. Field study was conducted at the Methodist University College Ghana, Wenchi Campus. The study consisted of five treatments of P fertilizer at the rate of 60 KgPha-1 applied at four different periods (week 5, week 6, week 7, and week 8) after planting, and control to cowpea variety, Asetenapa. The results of the study showed that the application of P fertilizer generally improved the productivity of the cowpea crop. It was found that 60 Kgha-1 applied at 5 wap significantly (P < 0.05) increased the components of

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