The purpose of this study is to test different rates of potassium, applied through the wings of Precision Planting’s FurrowJet®, to evaluate their impact on yield and profitability.

Corn requires potassium (K) in large quantities, therefore K is a known macronutrient. There are many factors in this study that likely led to K not being a yield-limiting factor this year. First, our soil tests showed that the levels of K were very high, which meant that the roots could access the nutrient much more easily. We also utilized an in-furrow K product in 6-24-6 to provide a concentrated source of nutrients within close proximity to the root system. From the time of planting, our soils remained warm and the soil moisture was adequate. These factors promoted strong root proliferation as well as access to soluble K wit hin the soil profile. It’s worth noting that our return on investment was significantly affected because liquid potassium is a much more expensive form of K than the granular forms.

Fall: Disk-Rip, Spring: Field Cultivation | 

Pre: 2 lb. Atrazine, 5.6 oz. Corvus®, 1 qt. Roundup PowerMAX® Post: 3 oz. Laudis®, 1 qt. Roundup PowerMAX® | 

Escalate® | Starter 10 gal. 28-0-0 2x2, 5 gal. PureGrade® Diamond 6-24-6 In-Furrow | 

*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.