Variabilidade espacial e qualidade da semeadura da cultura do milho

Abstract

Problems during the sowing operation can affect crop productivity. The objective was to evaluate the quality of sowing and the spatial variability of winter corn. Data collection occurred in the municipality of Dourados, MS, specifically in the Fazenda São Luiz. It were spatially collected distributed with sampling grid of a point every 0.5 ha. It was sampled, at each point, the amout of plants every two meters and the distance between plants in order to calculate the longitudinal distribution evaluating in normal, defective and double spacing. Posteriorly collecting the data were analyzed using descriptive statistics, geostatistics for making the maps of spatial variability and statistical process control. There has been loss-making areas and sowing operation was under control and reached the seeding goal. The submitted maps, more than 99% of the area was above 60% for a seeder regularity horizontal disc. However, in normal, double and fail spacing note that some points are outside the limits proposed, which reveals some failure in the seeding system.