SOIL PENETRATION RESISTANCE ANALYSIS BY MULTIVARIATE AND GEOSTATISTICAL METHODS

被引：3

作者：

Medina, Cecilia ^{[1
]}

Camacho-Tamayo, Jesus H. ^{[1
]}

Cortes, Cesar A. ^{[2
]}

机构：

[1] Univ Nacl Colombia, Fac Ingn, Dept Ingn Civil & Agr, Bogota, Colombia

[2] Univ Ciencias Aplicadas & Ambientales, Fac Ingn Agron, Bogota, Colombia

来源：

ENGENHARIA AGRICOLA | 2012年 / 32卷 / 01期

关键词：

compaction; cluster analysis; principal components; Andisol; PHYSICAL ATTRIBUTES; SPATIAL VARIABILITY; PENETROMETER RESISTANCE; COMPACTION; SYSTEMS; CROP; TILLAGE; YIELD;

D O I：

10.1590/S0100-69162012000100010

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

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.

引用

页码：91 / 101

页数：11

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