Development of soybean genotypes as a function of water availability and sowing seasons in Rio Verde, state of Goias

The productivity of the soybean crop is affected in the absence of favorable conditions for its complete development, and one of the most limiting factors is the water availability throughout the crop cycle. In this sense, the objective was to evaluate the behavior of three soybean genotypes, in two sowing dates, during two harvests. Four experiments were carried out in a randomized block design, with 4 repetitions, in the 2018/2019 and 2019/2020 harvests. The variables analyzed were plant height at maturity, days to maturity and grain yield. The water balance in the soil considered water storage of 46.8 mm. There were periods with greater water deficiency (53.5 mm) in the 2018/2019 harvest for all genotypes. In short, for genotypes with 100 to 110 days of cycle, the sowing time that showed the most promise to obtain higher yields, was between of october 20 and november 20, for genotypes with a cycle of 120 days, this the range of adaptation becomes broader, mainly because these genotypes have a longer vegetative period, being, therefore, the period of least water requirement for the crop.