Effect of N Application Rate and Time on Grain Yield of Winter Wheat and Soil NO3--N Content
ZHANG Xia, LUO Yan-qing, ZHANG Sheng-quan, ZHENG Qiang, FENG Han-yu, WANG Min, WANG Zhi-min
ACTA AGRICULTURAE BOREALI-SINICA . 2007, (3): 163 -167 .  DOI: 10.3321/j.issn:1000-7091.2007.03.038