Fertilizer, Soil, Nutrients, Field Crops, Row Crops
Jan 23, 2025
Have naturally very high potassium levels in our soils. Band about 4 gallons of kts (12.2lbs) with our corn for a little supplementation. Tissue levels seem adequate most of the year but just go back and forth on if adding more in form of 0-0-60 would gain us anything
Answers (5):
Feb 01, 2025
Check your Ca Mg ratio. I strive to get my K base saturation to at least 4 even if soil test shows I’m ok on ppm
Jan 25, 2025
Where your calcium and magnesium levels? Base saturation. High magnesium will tie up your potassium. If you have high potassium levels, I am told adding 8-10 oz of citric acid will break the bond of the magnesium and potassium and make the Pot available. Calcium is the driver of all nutrients. 65-70% calcium. 12-15% magnesium. 4-6% potassium base sat.
Jan 25, 2025
Corn is fairly efficient at utilizing available K.
If adequate potassium is available during kernel maturation, your current program is likely fine. If you are removing all your stover (silage) you should continue to monitor your soil levels.
Analysis of other cations (Mg &Ca, base saturation test will help determine if they are improper balance). If K is less than 4-5%, you MAY get some benefit of additional K2O.
Jan 23, 2025
What is your magnesium level?
Jan 23, 2025
My thinking is that you have this pretty much in order. However, without knowing more information, I would keep an eye on potassium to magnesium ratios. As magnesium in high PA soils could interfere with potassium uptake, and additional potassium might be of use
Potassium chloride would also provide some chloride for disease control again. You have to watch that with respect assault index. Placement is also an issue