A method of harvesting a crop material includes gathering the crop material with a harvesting implement as the harvesting implement moves along an initial path through a field. A location and a value of a characteristic of the gathered crop material is sensed at a plurality of intervals. A set of estimated values of the characteristic throughout the field is generated based on the sensed location and characteristic of the crop material at each of interval. A value of the characteristic of the crop material ahead of the harvesting implement is predicted as the harvesting implement moves along a harvest path, based on the set of estimated values of the characteristic of the crop material throughout the field. A function of the harvesting implement may be controlled based on the predicted value of the characteristic ahead of the pick-up.