Correlations of soybean yield with soil porosity and bulk density of an Oxisol

Sérgio Ricardo  Lima Negro; Diego  dos Santos Pereira; Rafael  Montanari; Flávio Carlos  Dalchiavon; Christtiane  Fernandes Oliveira

Correlations of soybean yield with soil porosity and bulk density of an Oxisol

Autores

Sérgio Ricardo Lima Negro

Diego dos Santos Pereira

Rafael Montanari

Flávio Carlos Dalchiavon

Christtiane Fernandes Oliveira

Editor

Universidade Federal de Goiás

Descripción

The spatial variability of soil physical attributes is important to indicate management practices that best suit agricultural areas. This study aimed to analyze spatial correlations between soybean grain yield and soil mass-volume relationships, in order to select which attribute is correlated with yield, as well as to evaluate the spatial variability of soil attributes and yield components of this crop, in an Oxisol under no-tillage system. The soil attributes analyzed (0.0-0.10 m and 0.10-0.20 m) were the following ones: soil bulk density (paraffin- coated clod and volumetric ring methods), particle density (volumetric flask and modified volumetric flask methods) and total porosity. The soybean yield components were evaluated as it follows: grain yield, number of pods per plant, number of grains per pod, mass of 100 grains, grain mass per plant, plant population and plant height. The total soil porosity, calculated by the relations between the bulk density (volumetric ring method) and particle density (volumetric flask), in the 0.10-0.20 m layer, was the best indicator of soybean grain yield under no-tillage conditions.