SPATIAL VARIABILITY OF SOIL TEST VALUES IN A TYPIC USTOCHREPT

被引：14

作者：

DHILLON, NS

SAMRA, JS

SADANA, US

NIELSEN, DR

机构：

[1] Department of Soils, Punjab Agricultural University, Ludhiana

[2] Central Soil and Water Conservation Research, Training Institute, Research Centre, Chandigarh

[3] Department of Land, Air and Water Resources, University of California, Davis

来源：

SOIL TECHNOLOGY | 1994年 / 7卷 / 02期

关键词：

SOIL TEST VALUES; SPATIAL VARIABILITY; TYPIC USTROCHREPT; SPATIAL VARIABILITY OF SOIL TEST VALUES;

D O I：

10.1016/0933-3630(94)90018-3

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Knowledge of ordered heterogeneity is useful for mapping, optimizing resource use, designing of field trials and most appropriate data interpretations. Eighty-one samples collected from 0 to 0.15 m soil depth on a 2 X 2 m grid pattern were analyzed for pH, EC, OC, available P, K, Fe, Mn, Zn and Cu in a 16 X 16 m plot. The coefficient of variation for the various soil test values varied from 11.1% to 66.4%. Two way simple trend variation ranged from 8% to 63% of variance depending upon the soil property. The random (nugget) component was as small as 15% for pH and as large as 65% of OC variance. The range parameter varied from 5.7 for Zn to 15.2 m in case of EC. Interrelationships of pH with Fe, Zn, P and OC were negative with the structural component ranging from 53.8% to 96.2% of the sill variance. Depending on soil analysis, the kriging (prediction) standard deviation was of the order of 0.72% to 10.0% of mean. Several applications of spatial variability concept for resource management are briefly discussed.

引用

页码：163 / 171

页数：9

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