What form of potassium is commonly included in fertilizers?

Potassium nitrate is commonly included in fertilizers because it provides both nitrogen and potassium, two essential nutrients for plant growth. Nitrogen is crucial for the development of plant leaves and overall growth, while potassium is vital for various physiological functions, including water regulation, enzyme activation, and photosynthesis. The combination of these elements in potassium nitrate makes it especially effective in promoting robust plant development.

Other forms of potassium mentioned, like potassium oxide and potassium sulfate, can also be used in fertilizers but typically serve different specific purposes or provide different nutrient ratios. Sodium potassium is not a recognized form of potassium used in fertilizers, which makes potassium nitrate the most commonly utilized form in standard fertilizer formulas.