Effects on inoculation and n fertilizer on cowpeas in Sierra Leone

Abstract

The effects of inoculation and N fertilizer on cowpeas variety Temne were studied on Njala upland soil. No specific trend was noticed due to indigenous cowpeas rhizobia, moisture stress and high soil temperature. Sixty and 90 kg N/ha showed highly significant and significant increases dry matter respectively as compared with control. Sixty kg N/ha showed highly significant increase in cowpeas yield as compared with control and 30 & 90 kg N/ha could not reach the level of significance. Dry matter significantly correlated with number of pods/plant (r = 0.532) and grain yield (r = 0.478). On the other hand, dry matter showed highly significant correlation (r = 0.558) with N uptake at flowering.