Acta Agrestia Sinica
Nitrogen Status Diagnosis of Fertilized Alfalfa during Budding Stage Using Digital Photography Analysis
CHEN Ji-shan, ZHU Rui-fen, GAO Chao, DI Gui-li, ZHANG Yue-xue
. 2013, (3): 576 -580 .  DOI: 10.11733/j.issn.1007-0435.2013.03.025