RETRACTED: Activities of functional enzymes involved in C, N, and P conversion and their stoichiometry during agricultural waste composting with biochar and biogas residue amendments

Nanyi Wang, Liheng Ren, Jiachao Zhang, Mukesh Kumar Awasthi, Binghua Yan, Lihua Zhang, Fachun Wan, Lin Luo, Hongli Huang, Keqi Zhao