Using Co-Kriging in variability studies to predict physical land qualities of a level river terrace

On a level river terrace with only limited physiographic features in the Limagne area in France, physical measurements were conducted at 62 sample locations, focusing on the spatial variability of soil-available water. Some 280 observations on a logarithmic sample grid were taken as well to measure basic soil properties. Pedo-transfer-functions were used to estimate soil physical characteristics which are usually difficult to measure in the field. Variability is studied with emphasis on anisotropy and the nugget effect.