Zoner is a precision agriculture web-based software to analyze the productivity of fields for farmers. Its services include organization and storage of raster and vector data for agricultural enterprises and farmers; assessment of land resources (determination of field fertility and field area); analysis of field variability and the delineation of areas within the field for variable rate (VR) fertilization, VR seeding and site-specific application of pesticides using multiple sources of data; assessment of current crop conditions; current weather monitoring and forecast of crop disease.