Study on the Spatial Distribution of Leaf N Content and SPAD Value in Cotton
LUOXin-Ning, CHEN Bing, ZHANGJu-Song, JIANGPing-An, LOUShan-Wei, PENGXiao-Feng, HEJia-Lin
Cotton Science . 2009, (5): 427 -430 .  DOI: 10.11963/cs090517