‎The basis for determining the suitable sowing date for winter wheat is ( ) and cultivars development characteristics.‍ A: Sowing amount B: Yield level C: Accumulated temperature before winter D: Rainfall

The basis for determining the suitable sowing date for winter wheat is ( ) and cultivars development characteristics. A: Sowing amount B: Yield level C: Accumulated temperature before winter D: Rainfall

Among the following alfalfa cultivars, which belong to the creeping-rooted type of grazing tolerance. A: Gannong No. 2 B: Gongnong No.3 C: Longmu No. 808 D: Xinmu No.4