The Effects of Different N and K Fertilizer Ratio and Planting Density on Yield and Dry Matter Accumulation of Sweetpotato
JIA Zhao-dong, MA Pei-yong, BIAN Xiao-feng, GUO Xiao-ding, XIE Yi-zhi
ACTA AGRICULTURAE BOREALI-SINICA . 2012, (S1): 320 -327 .  DOI: 10.3969/j.issn.1000-7091.2012.z1.063