Economics play as big a role as agronomics in the selection of crops grown under any cropping system. Government farm programs and market conditions must be considered in cropping decisions. Unfortunately, these decisions sometimes run contrary to good crop rotation practices.

If choices about rotations are being made on the basis of good crop production practices alone - usually the decisions will be the same regardless of whether it's zero tillage or conventional tillage. No matter what system is used, crops grown in the rotation should be chosen with disease, weed and insect control in mind. It is important to establish a rotation which minimizes the effects of these problems or which allows a wide range of control options.