Abstract
The relation between nine soil variables: soil nitrate, % sand, silt and clay, pH, electrical conductivity (ECe), sodium, potassium, and phosphorus plus petiole nitrate were analyzed by geostatistics and cluster analysis. The samples were collected from 49 sites in a 360 by 360m plot in a commercial cotton (Gossypium hirsutum) field. An intensive soils map of the plot was compared to distributions of the soil variables. Models developed from variograms of highly correlated variables were tested using a “jack-knifing” technique and then the data was block kriged. Soil nitrates were highly correlated with ECe, which has a similar spatial dependence and spatial structure. Percent clay and petiole nitrate were moderately well correlated and had similar spatial structure to each other.
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