rate of fertilizer application

例句：

1. 1.The rate of fertilizer application is crucial for crop growth.
   肥料施用率对于作物生长至关重要。
2. 2. The soil test showed a high rate of organic matter in the top layer.
   土壤测试显示顶层有机物质含量很高。
3. 3. The farmers need to adjust their fertilizer application rates according to the soil condition.
   农民们需要根据土壤状况调整他们的肥料施用率。