GCO 2601 - Materials Calculations Add to Personal Catalog GCO 2601 - Materials Calculations College Calculation of materials used in golf course and landscape operations, including pesticides, fertilizers, irrigation, grasses, plant materials and soil amendments, determination of areas and volumes, weights and measures, and calibration of equipment for materials application. Click here for the Summer 2026 Class Schedule Click here for the Fall 2026 Class Schedule