Prioritizing Potassium: Why We Should Start Calling It “NKP”, not NPK
Traditionally, agriculture’s top three macro-nutrients have been referred to as “NPK”. So it comes as no surprise that many growers place the value of each in the same order. However, leading soil fertility expert Dr. Carrie Laboski is challenging that thinking. Her game-changing research at UW-Madison suggests that if P and K levels are both testing low, prioritizing potassium ahead of phosphorus is the better financial choice, for better net returns.
No-till corn yield response to K and P fertilizer application
Research indicates that on soils testing low in K and P, potassium application was more effective in boosting yields than phosphorus.
Compare K and P results:
