INFLUENCE OF THREE CARBAMATE PESTICIDES ON TRACE ELEMENT STATUS (BORON, COPPER AND COBALT) OF ALIGARH SOIL

摘要

The effect of different doses of three car hamate pesticides on the change in concentration of water soluble boron, available copper, total copper and total cobalt over a period of 90 days is studied on saline sodic soil of Aligarh. Results revealed an optimum effect on the concentrations of B, Cu and Co with 0.25 g of pesticide 1, 0.2 g of pesticide II and 0.3 g of pesticide III per kg of soil at an interval of 30 days of application. The trace element status then declined. In presence of pesticides, the pH decreases while Eh and EC increases with time upto 30 days of application. The results are explained on the basis of chemical and microbial activity of pesticides in soil. The activity of pesticides was in order II>I> III. The correlation coefficient data suggest similar mechanism of the variation of trace elements in soil.