Image Source: Missouri Extension
Image Source: Missouri ExtensionPhosphorus and Potassium Application

At this time of year, growers are looking to add nitrogen to their fields. Phosphorus (P) and Potassium (K) should also be taken into consideration.  Wet fall conditions and colder than normal winter conditions have made it tough for soil sampling in some parts of the country, especially Illinois.  I came across a very informative article from the University of Illinois Extenstion that really brings out some good points regarding (P) and (K) application.  In summary the article states:

1) Soil Testing  – Time to Collect Samples, Compare Recommendations, Interpret Data Results

2) Application Rates  – Fall or Spring is not the issue, Determining requirements is the key