The price of fertilizer is continuing to climb. With the price of commodities it will be difficult for many to apply less fertilizer fearing a loss of yield. With proper management and knowledge of your soils you may just be able to apply less fertilizer and increase yields. In this memo from Midwest Labs for soil with higher magnesium and higher CEC here are some options to increase Potassium availability;
Potassium availability, and/or rate of exchange, can be enhanced by one or more of the following:
1. Optimum potassium soil test levels per C.E.C. range and percent magnesium values.
2. K2O fertilizer applied in bands.
b. Surface band
c. Subsurface band
d. Combination of (a) + (b) or (a) + (c).
3. Improve soil aeration
4. Adequate exchangeable soil calcium.
a. Calcium increases potassium adsorption into the plant (2).
b. Use calcitic lime on acid soils excess in magnesium.
c. Use gypsum where soil pH is greater than 6.4 on soils with excess magnesium.
d. Calcium additions can help alleviate soil compaction zones and promotes good soil structure
See more information from Midwest Labs
The Blogronomist is maintained by Craig Dick, head blogronomist and VP of Sales and Marketing. Here you will find a wide array of blog articles from Craig and expert guests on topics related to soil and crop health, farming, and so much more. If it’s not here, ask us!