Changing manure through nutrition When the phrase nutrient management is used in agriculture, thoughts often go directly to the farm fields where crops are grown. However, Chanhee Lee of The Ohio State University reminded the audience at the virtual Tri-State Dairy Nutrition Conference that on dairy farms, nutrient management refers to both the nutrients fed to the cows and the nutrients that are released through manure. As for feed, he said dairy producers want to provide the right nutrients, and the right amount of nutrients, to maximize production and improve efficiency. Then, farmers must manage the nutrients that come out the back end as manure.