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1. Represents revenue from loan deficiency and marketing loan programs.
2. Crop revenue equals yield per acre time price per bu.
3. Revenue from the loan deficiency program. LDP revenue is yield per acre times LDP per bu.
4. Includes revenue from direct and counter-cyclical programs.
5. Represents a return to pay for land and provide the operator a return.
6. Land costs are represented by a cash rent.
7. Operator return provides the farmer a return for invested equity capital and labor.
8. Positive net return indicate economic profits while negative values indicate economic loses. In equilibrium profits are expected to average zero over time.
9. The regions and counties in Illinois are classified as:
- Northern: Boone, Bureau, Carroll, Cook, DeKalb, Dupage, Grundy, Jo Davies, Kane, Kankakee, Kendall, Lake, LaSalle, Lee, Marshall, McHenry, Ogle, Putnam, Stephenson, Whiteside, Will, Winnebago.
- Central: Adams, Brown, Calhoun, Cass, Champaign, Christian, Clark, Coles, DeWitt, Douglas, Edgar, Ford, Fulton, Greene, Hancock, Henderson, Henry, Iroquois, Jersey, Knox, Livingston, Logan, Macon, Macoupin, Mason, McDonough, McLean, Menard, Mercer, Montogomery, Morgan, Moultrie, Peoria, Piatt, Pike, Rock Island, Sangamon, Schuyler, Scott, Shelby, Stark, Tazwell, Vermillion, Warren, Woodford.
- Southern: Alexander, Bond, Clay, Clinton, Crawford, Cumberland, Edwards, Effingham, Fayette, Franklin, Gallatin, Hamilton, Hardin, Jackson, Jasper, Jefferson, Johnson, Lawrence, Madison, Marion, Massac, Monroe, Perry, Pope, Pulaski, Randolph, Richland, Saline, St. Clair, Union, Wabash, Washington, Wayne, White, Williamson.
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