Effects of the soil on the activity of pentachlorophenol

There is little doubt that pesticides have contributed in no small measure to modern agriculture. However, it is apparent that many pesticides pollute agricultural products, soils, and water, affecting ecosystems. Pesticides should be examined not only from the standpoint of expanding agricultural production but also the aspect of environmental pollution should be considered. The major fractions of the pesticides applied to crops are known to enter the soil eventually, where they follow various fates, such as; absorption by organisms including crop plants, adsorption by soil colloids, chemical and biological degradation and decomposition, leaching from soils with gravitational water, all according to the properties of the pesticide, the nature of the soil and climate.