SURENDRA ST, SHARANAPPA S. Integrated management of nitrogen and phosphorus in maize (Zea mays) and their residual effect on cowpea (Vigna unguiculata). Indian J Agri Sci [Internet]. 2013 Mar. 4 [cited 2025 Oct. 26];70(2). Available from: https://epubs.icar.org.in/index.php/IJAgS/article/view/28053