surplus mature wheat variety

例句：

1. 1. The surplus mature wheat varieties are being tested for their yield potential.
   正在测试这些过剩的成熟小麦品种的产量潜力。
2. 2. The surplus mature wheat varieties have been planted in the fields to increase crop yields.
   已经种植了这些过剩的成熟小麦品种，以增加作物产量。
3. 3. The surplus mature wheat varieties are being used as a source of food for livestock.
   这些过剩的成熟小麦品种正被用作牲畜的食物来源。