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The paper gives a preliminary analysis of intensively sampled soil and wheat plant tissue in the field in order to determine spatial properties of some selected heavy metals in a sludge-applied agricultural soil in northern Tunisia. A preliminary geostatistical analysis shows that both soil and plant metal contents have a spatial structure with a range of less than about 10 m. The sludge application has affected mainly Cu contents of both soil and plant tissue.

SPATIAL VARIABILITY OF SOME HEAVY METALS IN SOILS AND CROPS DUE TO SLUDGE-AMENDMENT