I’ll try to avoid the subtext and snarkiness about if they are good or bad, but here is what I know about one program, the Conservation Reserve Program (CRP)
One reason for CRP is that, historically, farmers would try to plow and plant as much land as they could, including ‘marginal’ land. THis practice destroyed much of the land through erosion that has yet to recover. There are likely other reasons for CRP, like reducing production but I don’t know how truly important that is. Most of the time the boots on the ground people manage CRP to protect the soil and water by reducing farmers motivation to cultivate marginal ground.
The rules change all the time, so what I know may not be how things are this year or next.
Essentially, a farmer would have a field that has been in crop production for 3 of the last 5 years. They can ‘offer’ the government to accept it as CRP ground. If the county NRCS/FSA office accepts that this ground is suitable for the program, they will negotiate a contract with the farmer. The number of years in the contract can be quite long…10, 15, 20 years. The Federal government agency will negotiate a price per acre, type of ground cover to keep the field in, and prescribed care required to maintain the contract.
So they may agree to something like $80/acre for the farmer to keep cool season grasses, and require a light disking, burn, or chemical weed treatment halfway through the contract period. Also the farmer may need to mow 1/3 of the field every year and remove noxious weeds and any trees sprouting…but not during ground bird nesting season.
Or they may agree to $140/acre for the farmer to sow in polinators (wildflowers to help the bees/butterflies), with similar care. Planting these are much more expensive and require more care, so to motivate a farmer to do this requires more financial incentive.
The price negotiated is nearly always less than what the farmer would make on it if they had it in production, but enough to provide motivation to not farm it and care for the property properly. The farmer CANNOT make any agriculture money from the CRP land…no growing crops, no running cattle on it, no haying and bailing it (on rare drought years, haying may be allowed to feed cattle and reduce fire risk).
Every October during the contract the feds send a check to the farmer. THe farmer is supposed to maintain the land properly and if not, the contract could be canceled and the farmer would have to return any funds disbursed to that point.
At the end of the contract, both parties can negotiate again depending on if there is any money available and if the field has been properly maintained and is presumably still ‘marginal’.
I don’t think rich flat Illinois land is suitable for CRP, but hilly rutted, or strips along streams are good candidates.