8 Things to Keep in Mind When Planning for Fall Manure Applications

Aug 17, 2018

By Melissa Wilson

With a potentially tight window for getting on fall manure in the coming months, the best policy is to be prepared. Now’s the right time to start thinking about fall applications. Here are eight key things to keep in mind as you plan.

Start prepping equipment to make sure everything’s looking good for fall application.
Plan ahead for which crops will receive manure applications. Remember MPCA regulations for maximum application rates.
Wait until soil temperatures are below 50 degrees Fahrenheit. At these cooler temperatures nitrogen is more likely to stay in the organic or ammonium forms. In warmer soil temperatures, nitrogen converts to nitrate, a form that can be lost more quickly.
If you want to apply 1-2 weeks earlier, studies have shown some indications that applying with a nitrification inhibitor may potentially help, but don’t expect that to last if you apply in September.
If you’re going to apply in late summer or early fall following sweet corn and canning crops, get a cover crop on the field to preserve some of the nitrogen.
Keep weather conditions in mind. If you’re surface applying, don’t put it on one or two days before a large rain event.
Incorporate whenever possible, especially within 24 hours.
Safety is key when handling manure since gases can build up and cause human health or combustion issues. Have an emergency action plan in place and avoid working alone near manure storages, especially if the manure has recently been moved or is being actively agitated.

Have questions about fall manure application? Leave them in the comments.

Source: umn.edu

Video: Dr. Emerson Nafziger: Nitrogen Fertilizer Rates for Corn

The Crop Science Podcast Show, Dr. Emerson Nafziger from the University of Illinois breaks down decades of nitrogen research. From the evolution of N rate guidelines to how soil health and hybrid genetics influence nitrogen use efficiency, this conversation unpacks the science behind smarter fertilization. Improving how we set nitrogen fertilizer rates for rainfed corn is a key focus. Discover why the MRTN model matters more than ever, and how shifting mindsets and better data can boost yields and environmental outcomes. Tune in now on all major platforms!

"The nitrogen that comes from soil mineralization is the first nitrogen the plant sees, and its role is underestimated."

Meet the guest:

Dr. Emerson Nafziger is Professor Emeritus of Crop Sciences at the University of Illinois at Urbana-Champaign, with degrees in agronomy from Ohio State, Purdue, and Illinois. His research has focused on nitrogen rate strategies and crop productivity. He co-developed the Maximum Return to Nitrogen (MRTN) model, which is widely used across the Midwest. His research spans N response trials, hybrid interactions, crop rotation effects, and yield stability.