Soil penetration resistance analysis by multivariate and geostatistical methods

Engenharia Agrícola

Cecilia Medina²  Jesús H. Camacho-tamayo¹  César A. Cortés¹ 

[1] ,Universidad Nacional de Colombia Facultad de Ingeniería Departamento de Ingeniería Civil y Agrícola

关键词: compaction;    cluster analysis;    principal components;    Andisol;    compactación;    análisis jerárquico;    componentes principales;    Andisol;   

DOI  :  10.1590/S0100-69162012000100010

来源: SciELO

【 摘 要 】

The penetration resistance (PR) is a soil attribute that allows identifies areas with restrictions due to compaction, which results in mechanical impedance for root growth and reduced crop yield. The aim of this study was to characterize the PR of an agricultural soil by geostatistical and multivariate analysis. Sampling was done randomly in 90 points up to 0.60 m depth. It was determined spatial distribution models of PR, and defined areas with mechanical impedance for roots growth. The PR showed a random distribution to 0.55 and 0.60 m depth. PR in other depths analyzed showed spatial dependence, with adjustments to exponential and spherical models. The cluster analysis that considered sampling points allowed establishing areas with compaction problem identified in the maps by kriging interpolation. The analysis with main components identified three soil layers, where the middle layer showed the highest values of PR.

【 授权许可】

CC BY   
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