What is the best time to apply potassium to my corn?

2017 Multi-Location Corn Potassium Timing Study

2017 data across multiple Practical Farm Research (PFR) locations demonstrated that potassium application at planting showed a yield advantage whereas, applying potassium at V6 showed a minor yield increase. Applying 2 gal. Eezy™ K24 with FurrowJet Wings on either side of the furrow at planting resulted in an average +5.5 Bu./A. over the control of no potassium while waiting until V6 resulted in only +0.6 Bu./A. over the control.

The purpose of this study is to evaluate different application timings of potassium and their impact on yield and profitability.

Corn plants generally begin a rapid uptake of potassium (K) around the V6 growth stage. By applying liquid K through the FurrowJet™ at planting, a band of K was available at the start of its rapid uptake. On the other hand, the 360 Y-DROP® applications made on the surface at the V6 growth stage may have left the plant hungry for the nutrient when it was needed. Because K aids in many essential plant functions such as water, nutrient, and carbohydrate movement within the plant, enzyme activation, and regulation of stomata, having adequate K applied at the proper time could increase plant health and development, ultimately leading to higher yields.

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Potassium Timing Study

2017 Multi-location Corn Potassium Timing Study

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