K Removal
The Need for Potassium
Potatoes typically remove up to 56 lbs. of potassium (K2O) from the soil per 100 cwt of yield. That means a 500 cwt crop will remove about 280 lbs. of potassium per acre per year. If those nutrients aren't replenished, future crops can suffer in quality and uniformity of yield, specific gravity and storage capability, and have increased risks of external defects.