Manure and the Environment

Growth in the livestock sector has a lot of potential to benefit Nebraska economically, however it can also have negative impacts on our natural resources. To address some of these environmental impacts, the sector has been working hard to improve livestock water productivity. Recently, scientists at the Daugherty Water for Food Global Institute and the Department of Animal Science of the University of Nebraska, together with colleagues from the University of Twente, and the National University of Singapore worked together to estimate the changes in water productivity of animal products from 1960 to 2016.

Manure application on frozen or snow-covered soil poses a higher risk of nutrient loss through runoff.

Manure produced in animal feeding operations is a source of fertilizer that can be used to reduce our dependency on commercial fertilizers. Manure contains several essential nutrients that crops that crops rely on to grow, most notably nitrogen and phosphorus. Proper management of manure before, during, and after land application helps to slow down the contamination of our streams and reservoirs.

Most people alive today have never known a world without antibiotics. Antibiotics became widely used to treat bacterial infections in the 1930s and ‘40s, and were quickly labeled a “miracle drug”. But, as widespread use of antibiotics evolved, so did the discovery of antibiotic resistant bacteria. And we have now entered an era where antibiotic resistance is considered one of the biggest worldwide public health challenges of our time.

There are many challenges associated with variable rate manure applications such as variable nutrient content within the manure source and nutrient availability, application equipment, and prescription methodology. However, in many cases, these challenges are outweighed by environmental and economic benefits from variable rate manure applications.

This is a summary of the webinar “The Role of the Odor Footprint Tool in Livestock Nuisance Litigation” given on Jan. 21, 2021, as part of the University of Nebraska-Lincoln’s Department of Agricultural Economics Extension Farm and Ranch Management team’s weekly webinar series.

This year’s Land Application Recertification sessions, called Applying Manure Management Concepts On-Farm, are scheduled to be in-person at many locations across the state in June, with one taking place in May in Lexington. Manure trainings earlier this year were held virtually, but we’re making progress, and that means we’re looking forward to seeing everyone in-person for the next manure event.

When talking about manure's value, one needs to think about a variety of factors. Most folks think of fertilizer nutrients as manure’s primary value or MVP, but it takes more than one or two star players to make a great team. As such, manure wouldn't be as great as it is without other characteristics like the added organic matter that you get when applying manure, or the microbial community that is added to your field with that application.

The prices of synthetic fertilizers have increased significantly over the last year leaving growers and even homeowners facing the decision of finding alternative sources of nutrients. One great option is the use of manure or compost from a local farm or from your own operation. The use of manure in gardening can loosen compacted soil, increase carbon in the soil, and reduce surface runoff and leaching all while providing nutrients that your plants need. While this option is great, it is important to be aware of the potential carry over of herbicides in manure from grazing animals.

Every month the UNL Animal Manure Management Team produces graphics on the benefits of manure application and manure best practices and we want your help sharing them. The graphics are for educational purposes and for use by the public. Oftentimes the graphics we create include a link to an article featured on the UNL manure website, manure.unl.edu.