Responses of dry beans to applications of some undecomposed organic materials in the presence of mineral fertilizers containing, P, PK, NP or NPK

Experiments were conducted at Campinas and Pindorama, State of São Paulo, to study the effects of the indicated treatments on dry beans (Phaseolus vulgarisL.) Of the mineral fertilizers, only nitrogen increased the yields in both localities. Of the organic materials - Glycine javanica, Melinis minutiflora, coffee tree leaves and forest litter - the first mentioned was the most effective. In the Campinas experiment, G. javanica induced considerable yield increases, either when side placed or top dressed in the absence or in the presence of mineral nitrogen. At Pindorama, however, it was effective only when side placed in the absence of mineral nitrogen.