McNay Research and Demonstration Farm
Cover crops are an important component of the Iowa Nutrient Reduction Strategy to improve Iowa’s water quality. To meet the goal of a 45 percent reduction in the total nitrogen and phosphorus loads, it is estimated the total number of acres planted to cover crops will need to be at a minimum of four million acres or equivalent to about 20 percent of Iowa’s row crop acres. This implies millions of acres may be seasonally available for grazing.
Lundy, Erika; Vittetoe, Rebecca; DeJong, Joel; Doran, Beth; Kassel, Paul; Loy, Dan; Sellers, Joe; and Witt, Mike
"Enhancing the Value of Cover Crops through Utilization by Beef Stocker Cattle: Progress Report (Year 2),"
Farm Progress Reports: Vol. 2017
, Article 155.
Available at: https://lib.dr.iastate.edu/farmprogressreports/vol2017/iss1/155