KUMAR, ANIL, and K S THAKUR. 2011. “Effect of Intercropping in-Situ Green Manures and Fertility Levels on Productivity and Soil Nitrogen Balance in Maize (Zea mays)–gobhi Sarson (Brassica Napus) Cropping System*”. The Indian Journal of Agricultural Sciences 79 (9). https://epubs.icar.org.in/index.php/IJAgS/article/view/2506.