The dairy industry in Wisconsin produces the equivalent of 12 Billion gallons of liquid dairy manure annually. That’s enough to cover Lambeau field (including the endzones) to a depth of just over 5 miles. Wisconsin’s 134 for-hire manure applicators apply ~ 6 billion gallons of liquid manure and ~800,000 tons annually. This is a 50% increase in liquid manure application by for-hire applicators since 2006, and >300% increase in solid manure handling.
Soil Science Extension
University of Wisconsin Madison