Manejos de irriga？？o e nitrogênio na produ？？o de feijoeiro sob plantio direto

common bean has been cultivated by producers who have access to a wide range of technologies that allow a higher profitability in the winter. this study aimed at evaluating bean yield and its components, under no-tillage system, according to different irrigation and nitrogen fertilization managements, in aquidauana, mato grosso do sul state, brazil. the experiment was carried out from june to september (2010), in the universidade estadual de mato grosso do sul, in an alfisol. the "pérola" cultivar was sown in june and irrigated by conventional sprinkling. the experimental design was randomized blocks, with split-plots consisting of three blocks and two replications in each block. the plots consisted of three irrigation systems (class "a" pan and hargreaves-samani and penman-monteith equations) and the subplots of four nitrogen fertilizing doses (0 kg ha-1, 50 kg ha-1, 100 kg ha-1 and 150 kg ha-1). data were evaluated with the aid of variance analysis and compared by the tukey test (5%) and regression models. bean plants reached the highest grain yield and number of pods per plant when the class "a" pan irrigation system was used. nitrogen doses did not affect bean yield.