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A field of alfalfa with text 'From the Agronomy Team'
Cristie Preston, Ph.D.

In the Midwest, it is time for fall alfalfa seeding. Many farmers take advantage of fall seeding due to decreased weed pressure compared to spring. To achieve high yields and high protein for the next three to five years, nutrient management for alfalfa needs extensive attention even before seeding.

A recent article from Kansas State Research and Extension stresses that the first step is to soil sample and correct soil acidity before seeding. The optimum pH for alfalfa production is between 6.2 and 6.8 due to the symbiotic relationship with rhizobia.

Kansas State recommends phosphorus fertilizer applied if soil test levels are below 25ppm and potassium fertilizer if soil test levels are below 130ppm. Even if soil test levels are above these critical levels, additional fertilizer may be required. Starter nitrogen at 15-20 pounds per acre applied this fall could aid in germination and establishment.

Double check your nutrient uptake and removal with site specific yields using the eKonomics Nutrient Removal Calculator to ensure adequate nutrient availability and maximize yields.

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