In the Cerrado Region, farmers have been adopting the no-till system, to protect the soil and give sustainability to agriculture. In that system, soil covered by crop residues can minimize climatic risks by reducing water deficit of crops sowed in late season. The objective of this study was to compare the climatic risk of dry season common beans grown in the State of Goiás, under conventional and no-till systems. The BIPZON model was used to calculate the water balance. Geographic Information System was used for the characterization of the results in time and space. Areas of low, medium and high climatic risks were identified for the no-till system, with 50 and 100% of soil coverage by crop residues, as well as for the conventional till system. It was verified that the use of no-till system increased the areas with lower risks and extended the period of sowing for the bean crop in relation to conventional till system. The effect was higher with 100% soil covered with crop residues.
Phaseolus vulgaris L.; sowing period; water deficit; crop residues
