Spreading Dry Fertilizer

See more at In fall, it s common practice to apply dry fertilizer after harvest for the following crop. The bulk of this fertilizer will be Potassium and Phosphorous. Lime may also be spread to maintain proper soil pH. We spread fertilizer with variable rate mapping based on soil tests. Variable rate means a GPS map tells the spreader where to apply differing rates across a field, and sometimes no fertilizer at all.