fall-and-spring-applied nitrogen fertilizers

例句：

1. 1. The farmers applied the fall-and-spring-applied nitrogen fertilizers to their crops, hoping for a bumper harvest.
   农民们给庄稼施加了秋施氮肥，希望能有一个丰收的收成。
2. 2. The plant nursery used the fall-and-spring-applied nitrogen fertilizers to promote the growth of youngplants.
   植物苗圃使用秋施氮肥来促进幼苗的生长。
3. 3. The soil test showed that the application of fall-and-spring-applied nitrogen fertilizers could significantly increase the yield of the crops.
   土壤测试显示，秋施氮肥的应用可以显著提高作物的产量。