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.