Abstract:
Out of the nine constraints identified in evolving and spreading improved rice
varieties, lack of facilities for evolving specific varieties suited to certain rice pockets of Kerala
ranked first as percieved by the research subsystem. Non-filling up of post of scientists, lack
of facilities to multiply seeds of improved varieties and for onfarm teaching of farmers were
other important constraints in the descending order. Susceptibility to pests and diseases,
requirement of heavy dose of fertilizers, poor cooking quality and low straw yield were the
most important constraints in spreading and adopting improved rice varieties as perceived
by extension, client and input subsystems.
