amount of potassium applied

例句：

1. 1.The soil test showed a significant amount of potassium in the plant roots.
   土壤测试显示植物根部有大量的钾。
2. 2. The fertilizer application was crucial to increasing the plant's potassium content.
   施肥对增加植物的钾含量至关重要。
3. 3. To maintain healthy growth, it is important to monitor the amount of potassium applied to the plants.
   为了保持健康生长，监测施加到植物上的钾量是很重要的。