Authors : M.D. Toungos , A.A. Sajo and D.T. Gungula
Abstract: Research was conducted during the 2002, 2003 and 2004 cropping seasons at the Federal College of education Teaching and Research Farm. The experiments were located within latitude 9019’N and longitude 12030’E, at an altitude of 185.9 m above sea level. The research was conducted on 2 cultivars of bambara groundnuts Vigna subterranean (L) Verde), cream and variegated with the aim to determine the recommended fertilizer levels on bambara groundnut in Yola Adamawa State, Nigeria. Soil samples were collected at different spots within the experimental sites before and after harvesting every year by throwing a quadrant and collecting 0-15 cm depth of soils, which was subjected to Laboratory analysis. Four levels of single super phosphate fertilizer at 0, 30, 60 and 90 Kg ha-1 of P2O5 coded L1, L2, L3 and L4 were used. Establishment counts and growth parameters on number of plants/stand, plants heights and leaves numbers, fresh and dry weights of the crop, root length, nodules number and yield in kg ha-1 as affected by P2O5 levels were determined. During the three years of experimentation, it was observed that fertilizer application at the rate of 60 kg ha-1 of P2O5 gave the highest yield of 432.5 kg ha-1, even though the fertilizer level at 90 kg ha-1 gave higher yield in some treatments, it was found not to be economically profitable. Therefore, based on the results the fertilizer level of 60 kg ha-1 of P2O5 is recommended for bambara groundnut in Yola, Adamawa State Nigeria.
M.D. Toungos , A.A. Sajo and D.T. Gungula , 2009. Recommended Fertilizer Levels on Bambara Groundnut (Vigna subterranea (L) Verde) in Yola Adamawa State, Nigeria. Agricultural Journal, 4: 14-21.