Spatial Variability of Irrigated Common Bean Yield Correlated With the Fertility of a Sandy Soil

Abstract

The common bean is widely cultivated in Brazil. In the 2016-2017 growing season, an experiment was carried out in a Typic Quartzipsamment (or Neossolo Quartzarênico) soil in the municipality of Cassilândia, MS, Brazil, with the aim of characterizing specific aspects of soil management, using a linear and spatial correlation between the irrigated yield of common beans and the chemical properties of the soil. Soil samples were collected from layers at depths 0.00-0.10 and 0.10-0.20 m, within a grid of 117 georeferenced points. A data analysis was carried out using statistical and geostatistical techniques. A multiple regression analysis showed that about 31% of the grain yield variability of the irrigated common bean crop could be attributed to the spatial variability in the chemical properties of the soil. These properties have a spatial dependence that is classified as moderate and strong, with a predominantly Gaussian-type semivariogram model. Soil properties such as pH(1), pH(2), S(2) and V%(2) can be considered potential indicators of the grain yield of an irrigated common bean crop when cultivated in a sandy soil under a no-tillage system.

Efficiency and quality of soil sampling according to a sampling tool

“…The lowest coefficients of variation (CV%) were observed for pH and CEC, indicating that these variables were the most homogeneous in the soil. Low CV values for pH are commonly found in soils (Oliveira et al, 2020;AbdelRahman et al, 2021;Gelain et al, 2021). The homogeneity of the pH is related to the subtle slope of the area and the parent material from which the soil is formed (AbdelRahman et al, 2021).…”