Effect of Irrigation and Nitrogen Fertilizer on NO3--N Content and Distribution in Soil
LIU Wei, ZHAO Tong-ke, WANG Li-ying
ACTA AGRICULTURAE BOREALI-SINICA . 2006, (3): 27 -30 .  DOI: 10.3321/j.issn:1000-7091.2006.03.008