College of Agriculture, Jabalpur, M. P.
Three hundred eighty two surface soil samples covering six soil types of Madhya Pradesh were analysed for total and available copper, pH, calcium carbonate and organic carbon. Black soils were found to be richer in copper content, both total and available, whereas alluvial soils had the lowest amount of both. Available copper formed 8.0 per cent of total copper. A linear correlation coefficient between total and available copper was observed (r== +0.8147). Only 2.36 per cent of samples analysed had deficient supply of available copper (one ppm available copper is considered as critical limit). Generally negative correlation was observed between pH and available copper. No consistent relationship between available copper and calcium carbonate or organic matter was observed.
