Precision grading of a field provides a positive method of improving surface drainage as well as making furrow irrigation possible. If a field is being considered for precision grading, the soil should be evaluated to determine what problems might occur if deep cuts are made in some areas. The cut areas may expose soil with reduced production capability. County soil survey reports, published by the Natural Resources Conservation Service (NRCS, formerly SCS), can help identify soils with unproductive subsoils. Taking several deep (more than 6 inch depth) soil cores or samples may be beneficial if a problem soil is suspected. Poultry litter application may improve the productivity of cut soils. An Extension publication, Soil and Fertilizer Informa tion Article 2-90, Poultry Litter as an Amendment for Precision Graded Soils, reports on results of litter application studies.