An agricultural communications network including a master system which polls lower level systems for digital maps, each map comprising field character information indicative of a feature at each location of a farmer's field. An agronomist can correlate the data of the digital maps to ascertain common conditions which realize maximum yields. Farmers and their regional dealers participate in the system through subscription. Anonymity is maintained through hierarchy such that the farmers will participate in the network, thus expanding the data base for use by the agronomist. Thus, the participating subscribers facilitate expansion of the field of agronomy for the benefit of all.