CHOUDHARY, R. L., and U. K. BEHERA. 2021. “Optimization of Conservation Agriculture and N Nutrition in maize–wheat Cropping System: Assessment on Productivity, Energy Indicator, Nutrient Apparent Balance and Economics”. Journal of Soil and Water Conservation 20 (1). https://epubs.icar.org.in/index.php/JSWC/article/view/114413.