Response of rice varieties to forms of urea and levels of N in rice-zero till maize cropping system

A field experiment was conducted to evaluate the performance of rice varieties of different duration in relation to levels of N and forms of urea during wet seasons of 2006–07 and 2007–08 on sandy clay loam soils of Rajedranagar, Hyderabad. Results indicated that the long duration variety BPT-5204 out yielded other two varieties, M-7 (medium) and Tellahamsa (short) in terms of growth, dry matter production, per day productivity, grain yield and straw yield. Increasing levels of nitrogen from 75% recommended dose of nitrogen (RDN) i.e. 100kg N ha−1 to 125% RDN brought significant improvement in growth parameters, yield attributes and grain yields irrespective of the rice varieties.