Research Article
The Effect of Early Season Drought on Chlorophyll a Fluorescence in Sugar Beet (Beta vulgaris L.)
Khorasan Agriculture Research Center, Mashhad, Iran, Pox: 91735
H. Rahimian
Faculty of Agriculture, Ferdosi University, Mashhad, Iran
M. Moghaddam
Faculty of Agriculture, Tabriz University, Tabriz, Iran
S. Y. Sadeghian
S.B.S.L, Karaj, Iran