Potassium (K) fertilization is important for high yields in forage crops such as alfalfa. While K fertilizer has historically been cheap compared to the other major macronutrients, supplying removal rates to alfalfa annually can result in a significant expense to alfalfa producers. Research from the University of Minnesota clarifies when it makes sense to apply K, when it doesn't, and what factors to keep in mind.

From the University of Minnesota, here's how to cut back on nutrient application to increase your profitability while maintaining the integrity of your crops.

Penn State Extension explains why soil potassium levels are critical to plant health, how to test for it and properly correct any deficiencies.