EFFECT OF NITROGEN AND PHOSPHORUS LEVEL AND SOWING DATE ON DYNAMIC CHANGE IN GRAIN FALLING NUMBER IN SPRING WHEAT IN GRAIN FILLING
ZHAO Xiu_Lan, LI Wen_Xiong
Chin J Plant Ecol . 2006, (2): 344 -351 .  DOI: 10.17521/cjpe.2006.0046

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