Effects of biochar application on total nitrogen and alkali-hydrolyzable nitrogen content in the topsoil of the high-yield cropland in north China Plain
GUO Wei, CHEN Hongxia, ZHANG Qingzhong, WANG Yiding
Ecology and Environmental Sciences . 2011, (3): 425 -428 .  DOI: 10.16258/j.cnki.1674-5906(2011)03-0425-04

Copyright © 2021 Editorial Office of ACTA PETROLEI SINICA

Address:No. 6 Liupukang Street, Xicheng District, Beijing, P.R.China, 510650

Tel: 86-010-62067128, 86-010-62067137, 86-010-62067139

Fax: 86-10-62067130

Email: syxb@cnpc.com.cn

Support byBeijing Magtech Co.ltd, E-mail:support@magtech.com.cn