PRODUCTIVITY AND ECONOMICS OF RICE BASED CROPPING SYSTEM AS INFLUENCED BY DIFFERENT ORGANIC NUTRIENTS

A field experiment was conducted at TamilNadu Agricultural University, Coimbatore during
the year 2005-07. The experiment was laid out in randomized block design with three replications.
The treatments imposed were, enriched compost alone (T1), vermicompost alone (T2), FYM +
non edible oil cake (1/2 each) (T3), Enriched compost + Vermicompost + Farmyard manure (1/
3 each) (T4) and Control (T5). The rice variety ADT 46 was transplanted in November 2005 and
2006 and blackgram CO 5 was sown in February 2006 and 2007, respectively. The results revealed
that the combination of farmyard manure and non edible oil cake each supplied at 50 % of
nutrient sources recorded the highest yield of rice followed by application enriched compost +
vermicompost + farmyard manure each at one third proportion and application of vermicompost
alone. Yield of blackgram was favorably influenced by application of farmyard manure and non
edible oil cake each supplied at 50 % of nutrient and followed by application of enriched compost
+ vermicompost + farmyard manure each at one third proportion and application of
vermicompost alone.