Acta Agrestia Sinica
Study on Effects of N,P and K Fertilizers on Alfalfa Hay and Recommended Fertilizer Rate in Huang-Huai-Hai Area
ZHANG Tie-jun, ZHAO Zhong-xiang, LONG Rui-cai, LV Hui-gang, YANG Qing-chuan, KANG Jun-mei
Acta Agrestia Sinica . 2019, (1): 243 -249 .  DOI: 10.11733/j.issn.1007-0435.2019.01.031