Growth and yield responses of Sphenostylis stenocarpa (Hochst ex A. Rich) Harms to phosphate enrichment of soil

Abstract

The effects of varying levels (0, 110, 220, 330, 440, and 550 kg P/ha) of phosphate application on some growth and yield parameters of African yam bean were studied. Plant dry weight under 550 kg P/ha treated soils with values ranging from 13.79 to 16.32 g per plant significantly (<0.05) differed from those of the control treatment, (12.79 g). Grain yield was enhanced following increased phosphate fertilization, with highest yield (1509.02 kg/ha) recorded in 330 kg/ha compared to those under 550 kg/ha treatments (1420.72 kg/ha).