Distribuition of plants and mechanical resistance of soil to penetration in bean sowing

Abstract

Seeders-fertilizers can present problems of direct seeding performance, which are related to soils with high clay contents. Mapping the spatial variability of soil attributes makes it possible to rationalize agricultural management and promote sustainable agriculture. The objective of this work was to evaluate the spatial variability of the longitudinal distribution of plants, and the mechanical resistance of the soil to penetration (RMSP) in sowing of beans grown under no-tillage. A sampling mesh with 112 points spaced 25 m was used, where the plant stand, the uniformity of spacing between seedlings and the RMSP were determined. Most of the area showed low levels of acceptable spacing (45 and 55%), and consequently high levels of double spacing (15 and 25%) and flaws (15 to 35%), showing that the arrangement of plants in the experimental area did not is adequate. The plant stand showed good uniformity throughout the area, with a predominance of 9 to 11 plants m^-1. The Mechanical Resistance of Soil to Penetration in the layers of 0.00 - 0.10, 0.10 - 0.20, 0.20 - 0.30, 0.30 - 0.40 m are within the tolerable limits, not restricting plant development.