The "Corn Silage: Hay Economics Calculator" is a spreadsheet developed by experts at the University of Wisconsin. It is intended to help dairy producers who grow their own forages make the decision of what proportion of the forage ration of hay: corn silage dry matter is economical.
The worksheet was produced by Ken Bolton, Bruce Jones and Randy Shaver.
Click here to access the calculator.
Source: Center for Dairy Profitability, Dept. of Agricultural Economics, and Dept. of Dairy Science - UW-Madison