Dynamics of organic carbon and nitrogen in deep soil profile and crop yields under long-term fertilization in wheat-maize cropping system by Muhammad QASWAR, Dong-chu LI, Jing HUANG, Tian-fu HAN, Waqas AHMED, Sehrish ALI, Muhammad Numan KHAN, Zulqarnain Haider KHAN, Yong-mei XU, Qian LI, Hui-min ZHANG, Bo-ren WANG, Ahmad TAUQEER

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