The Ontario Phosphorus and Potassium Database
![corn field with blue sky in background](https://fieldcropnews.com/wp-content/uploads/2022/03/IMG_20190626_1535309-1024x683.jpg)
Did you know that a review of Ontario phosphorus (P) and potassium (K) fertilizer guidelines was undertaken? The work looked at crop responses to P and K for corn, soybeans, winter wheat and alfalfa from 368 trials conducted over the last several decades. It compared most economic rates to current Ontario fertilizer guidelines as found […]