2021, Vol. 4, Issue 1, Part A

author(s)
Taminaw Zewdie Nigatie

abstract
This paper reviews on effect of N and P fertilizer rates on yield and yield components of common bean [Phaseolus vulgaris (L)] varieties. Under this review recent literatures concerning on effect of nitrogen fertilizer rate, effect of phosphorus fertilizer rate and interaction effect of NP fertilizer rate relating with different varieties of common bean have been covered. From those N and P fertilizers have significance effect on production of common bean varieties. And it showed that the increased N rates linearly increased grain yields in both common bean cultivars IPR 139 and perola up to a rate of 180 kg n ha-1, regardless of the plant density. The review also covered the effects of Phosphorus Fertilizer and different common bean varieties and it indicated that Hawassa Dume variety showed the best performance followed by Nasir where as Ibbado showed the least except in 1000 seed weight and harvest index. Under the interaction effect of NP fertilizer this review showed that no significant increase in growth and phonological characters as well as yield attribute with increased rates of NP fertilizers above 27 kg n: 69 kg p2o5 ha-1. Optimum grain yields were reviewed in response to combined application of 27 kg N and 69 kg P2O5 ha-1 for Awash 1, Awash Melka and Red Wolayita respectively. Generally, under this review it is triad to show the recommended fertilizer rate and its combination for the recommended types of varieties and its growth performance from different literatures with explanatory tables and figures