钾的

例句：

1. 1.Potassium is an essential mineral for plant growth.
   钾是植物生长所必需的矿物质。
2. 2.The soil test showed that the potassium levels were low in the field.
   土壤测试显示田地里的钾水平很低。
3. 3.Potassium helps to improve crop yields by increasing plant health and reducing disease.
   钾通过提高植物健康和减少疾病来提高作物产量。