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SPATIAL VARIABILITY OF PHYSICAL ATTRIBUTES IN A TYPIC HAPLUSTOX IN THE EASTERN PLANES OF COLOMBIA

机译:物理属性的空间障碍 哥伦比亚东部平原的典型 haprastox

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摘要

The objective of the present work was to determine the behavior of the spatial variability of the penetration resistance (RP), bulk density, soil density, total porosity and the sand, lime and clays contents, as well as the relation between these properties. The present study was conduced in Puerto Lopez (Meta-Colombia). Soil samples were collected in a regular grid, comprising 42 points, spaced at separation distances of 25 m between points, for two depths (0,00 0,10 and 0,10-0,20 m). The RP was analyzed up to the depth of 0,42 m. The RP did not correlate with any property in the first depth. Between 0.10-0.20 m depth, the RP were correlated with the lime and sand contents. The RP semivariograms indicates no spatial correlation in both depths, possibly due to soil tillage practices, which modifies the superficial spatial structure, gradually inducing to soil homogeneity. The properties adjusted mainly to exponential and spherical semivariograms models. For 0,10-0,20 m depth, the properties presented nugget effect, without spatial correlation, except for the bulk density.
机译:本工作的目的是确定抗渗透性(RP)、容重、土壤密度、总孔隙度和砂、石灰和粘土含量的空间变异性的行为,以及这些性质之间的关系。本研究在洛佩斯港(Meta-Colombia)进行。土壤样品收集在一个规则的网格中,该网格由42个点组成,点之间的间隔距离为25 m,两个深度(0,00,0,10和0,10-0,20 m)。RP被分析到0,42 m的深度。RP 与第一个深度的任何属性都不相关。在0.10-0.20 m深度范围内,RP与石灰和砂含量相关。RP半变异函数表明两个深度没有空间相关性,这可能是由于土壤耕作方式改变了表层空间结构,逐渐诱导土壤均匀性。这些性质主要针对指数和球面半变异函数模型进行了调整。对于0.10-0.20 m深度,除堆积密度外,各属性均呈现出块状效应,无空间相关性。

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