A spreadsheet to help compare the long-term costs of ownership for tower silos, bunker silos and silage bags is available from the Crop Storage Institute, Green Bay, WI.
The easy-to-use Microsoft Excel spreadsheet considers all ownership costs, including initial costs, costs of operating tractors, depreciation costs, etc. The inputs can be modified to analyze each situation individually.
For a limited time, the program is free. Call 630-258-7206 or send an e-mail to cropstorage@cs.com .