Effects of Snow Cover on Alfalfa Overwintering and Turning Green

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In order to investigate the effect of snow cover on alfalfa overwintering and turning green, 6 different alfalfa varieties (including Longmu 806, Gongnong No. 1, Aohan, Wega 7F , WL319 HQ, Caoyuan No. 3) were used as plant materials. There were 4 treatmen
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