A review on controlled release of nitrogen fertilizers through polymeric membrane devices

Consequent to the better understanding of various agrochemicals, their func tions during the growth cycles of plants and other aspects concerning econo mics, environment, and so forth, the controlled-release technology has emer ged in the areas of fertilizers, herbicides, and pesticides. The present re view discusses the technology and applications of controlled-release delive ry systems concerning agrochemicals and the related technological advances with some critical suggestions. Emphasis is placed on inexpensive materials , simpler technologies, and statistical evaluation in planning and developi ng newer system. The interrelationship between technologies for controlled- release and membrane applications is discussed.