Acta Agrestia Sinica
Study on Soil Available Nitrogen Boundaries of Farmland-grassland Mosaic in Agro-pastoral Transition of North China
FU Yao, LIU Li, LIN Chang-cun
Acta Agrestia Sinica . 2014, (6): 1222 -1226 .  DOI: 10.11733/j.issn.1007-0435.2014.06.011