Abstract
Field experiments were conducted on a sandy clay loam soil during kharif and rabi 2006-07 and 2007-08 at Agriculture College Farm, Rajendranagar, Hyderabad to evaluate diversified rice ( Oryza sativa L.) based cropping system with rice varieties and legume crops. The experiment was laid out in split plot design with three rice variet- ies of different durations, viz., Samba Mahsuri ( BPT-5204), Early Samba ( M-7) and Tellahamsa as main plot treatments in kharif and sub-plot treatments of maize ( Zea mays L.) with and without herbicides, greengram ( Vigna mungo L.) and blackgram [ Vigna radiata (L.) Wilczek] were super imposed on the rice varieties during rabi season in three replicates. Samba Mahsuri long duration rice produced 0.9 and 1.9 t/ha higher yield and ` 7,891 and 16,074/ha higher net return over Early Samba and Tellahamsa. The performance of rabi crops was not in- fluenced by the rice varieties of kharif season. In terms of rice equivalent yield and net returns, ricezero tillage maize, irrespective of herbicides supplementation, was 103-197 percent superior over existing rice-pulse se- quence. Soil fertility status and microbial population of the rice maize system was lower than rice legume sys- tem.
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