L. F. WU and Z. OUYAN, “Effect of long-term fertilization on soil fertility of wheat (Triticum aestivum )-corn (Zea mays ) double cropping system in China”, Indian J Agri Sci, vol. 76, no. 9, Jan. 2011, Accessed: Jul. 04, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/3059