WU LF, OUYAN Z. Effect of long-term fertilization on soil fertility of wheat (Triticum aestivum )-corn (Zea mays ) double cropping system in China. Indian J Agri Sci. 2011;76(9). Accessed July 4, 2026. https://epubs.icar.org.in/index.php/IJAgS/article/view/3059