A computer-implemented method for optimal production of a selected crop to be grown on a field having one or more geospatial zones, the method comprising: collecting and storing a set of parameters of the one or more geospatial zones; automatically producing a set of nutrient requirements of one or more nutrients; obtaining a fertilizer product set comprising one or more fertilizer products for applying to the one or more geospatial zones; and determining a first agronomic prescription for applying the fertilizer product set to the one or more geospatial zones at a fertilizer rate for growing the selected crop; wherein the computer-implemented method is characterized in that: said collecting and storing a set of parameters comprises: collecting and storing into one or more cloud-based databases the set of parameters comprising at least soil testing data, predefined agronomic crop needs, and yield goals of the one or more geospatial zones; said automatically producing the set of nutrient requirements of the one or more nutrients comprises: collecting and storing into the one or more cloud-based databases satellite imagery of the one or more geospatial zones, automatically obtaining geospatial zone delineation of the one or more geospatial zones from the satellite imagery, and automatically producing the set of nutrient requirements of the one or more nutrients at least based on the soil testing data, the geospatial zone delineation, the predefined agronomic crop needs, and the yield goals; and the computer-implemented method further comprises: receiving a first user input indicating a first fertilizer product from the fertilizer product set as a driver fertilizer product, and calculating the fertilizer rate of the fertilizer product set based on the driver fertilizer product and the set of nutrient requirements. collecting and storing a set of parameters of the one or more geospatial zones; automatically producing a set of nutrient requirements of one or more nutrients; obtaining a fertilizer product set comprising one or more fertilizer products for applying to the one or more geospatial zones; and determining a first agronomic prescription for applying the fertilizer product set to the one or more geospatial zones at a fertilizer rate for growing the selected crop; wherein the computer-implemented method is characterized in that: said collecting and storing a set of parameters comprises: collecting and storing into one or more cloud-based databases the set of parameters comprising at least soil testing data, predefined agronomic crop needs, and yield goals of the one or more geospatial zones; said automatically producing the set of nutrient requirements of the one or more nutrients comprises: collecting and storing into the one or more cloud-based databases satellite imagery of the one or more geospatial zones, automatically obtaining geospatial zone delineation of the one or more geospatial zones from the satellite imagery, and automatically producing the set of nutrient requirements of the one or more nutrients at least based on the soil testing data, the geospatial zone delineation, the predefined agronomic crop needs, and the yield goals; and the computer-implemented method further comprises: receiving a first user input indicating a first fertilizer product from the fertilizer product set as a driver fertilizer product, and calculating the fertilizer rate of the fertilizer product set based on the driver fertilizer product and the set of nutrient requirements. said collecting and storing a set of parameters comprises: collecting and storing into one or more cloud-based databases the set of parameters comprising at least soil testing data, predefined agronomic crop needs, and yield goals of the one or more geospatial zones; said automatically producing the set of nutrient requirements of the one or more nutrients comprises: collecting and storing into the one or more cloud-based databases satellite imagery of the one or more geospatial zones, automatically obtaining geospatial zone delineation of the one or more geospatial zones from the satellite imagery, and automatically producing the set of nutrient requirements of the one or more nutrients at least based on the soil testing data, the geospatial zone delineation, the predefined agronomic crop needs, and the yield goals; and collecting and storing into the one or more cloud-based databases satellite imagery of the one or more geospatial zones, automatically obtaining geospatial zone delineation of the one or more geospatial zones from the satellite imagery, and automatically producing the set of nutrient requirements of the one or more nutrients at least based on the soil testing data, the geospatial zone delineation, the predefined agronomic crop needs, and the yield goals; and the computer-implemented method further comprises: receiving a first user input indicating a first fertilizer product from the fertilizer product set as a driver fertilizer product, and calculating the fertilizer rate of the fertilizer product set based on the driver fertilizer product and the set of nutrient requirements. receiving a first user input indicating a first fertilizer product from the fertilizer product set as a driver fertilizer product, and calculating the fertilizer rate of the fertilizer product set based on the driver fertilizer product and the set of nutrient requirements.