Study on Soil Nitrogen Mineralization in Protected Vegetable Fields of Beijing Suburb
HU Dao-long, CUI Xiao-yong, WANG Yan-jie, FU Hua, ZOU Guo-yuan
ACTA AGRICULTURAE BOREALI-SINICA . 2008, (5): 214 -218 .  DOI: 10.7668/hbnxb.2008.05.046