In which position is potassium most likely to be released to soil solution?

Potassium is most likely to be released to the soil solution from the para position. This position refers to potassium ions that are held by clay or organic matter in a way that they are not tightly bound and can be exchanged with other ions in the soil solution. When potassium is in the para position, it is available for plant uptake because it can readily move into the soil solution where roots can access it.

In contrast, potassium in the internal position is more tightly bound within the clay structure, making it less available for plants. The edge position may also have potassium, but it typically represents a transient state and is not the primary source for potassium availability. Understanding these positions helps in managing soil fertility and ensuring that plants have access to the essential nutrients they require for growth.