Effect of Nitrogen Application Rate on Crop Yield and the Soil Nitrate Nitrogen Content in Taihang Piedmont Area
RU Shu-hua, GENG Nuan, ZHANG Guo-yin, WANG Ling, SUN Shi-you
ACTA AGRICULTURAE BOREALI-SINICA . 2015, (5): 161 -166 .  DOI: 10.7668/hbnxb.2015.05.027