Soil potassium is crucial for plant growth, but there is a shortage of potassium in many areas. Researchers are exploring ways to address this issue, such as using substitutes for potassium fertilizer. The balance of potassium in the soil directly affects how much plants can absorb. Studies show a decrease in available soil potassium over time. Scientists are looking into different forms of soil potassium and how plants interact with it to improve crop growth.