Department of Agronomy, Assam Agricultural University, Jorhat, 785013
1Present address: Regional Agricultural Research Station, Nagaon, Assam 782 002
In an experiment conducted during 1997–98 and 1998–99, incorporation of crop residues of either rice (Oryza sativa L.) straw or wheat (Triticum aestivum L emend. Firori & Paol.) straw increased the yield and yield components of rice and nutrient uptake and also improved the physico-chemical properties of the soil which provided better soil environment for crop growth. Increasing levels of NPK application increased the yield-attributing characters and nutrient uptake by both the crops which ultimately increased the grain and straw yields thus, 100% NPK levels gave the highest yield. There was no significant effect on physico-chemical properties of soil due to increasing levels of NPK application.
Crop residues, Chemical fertilizers, Rice-wheat sequence
