Method and system for determining a measurement region

A computer-implemented method for determining at least one measurement region for carrying out at least one measurement with a crop nutrient measurement device in said measurement region for providing a fertilizer recommendation to a crop, comprising the steps of:

• determining an agricultural field or a part thereof, wherein the agricultural field comprises the crop for which the recommendation is intended;
• receiving position dependent yield data of the agricultural field, wherein the position dependent yield data comprises yield data from at least one prior crop season;
• determining the at least one measurement region comprising:
• determining at least one area within the agricultural field wherein the area's yield is comprised within a predetermined yield range;
• determining the at least one measurement region within the at least one determined area within the predetermined yield range further comprises:
• receiving remote spectral data from at least a plurality of wavelengths of the agricultural field;
• processing the remote spectral data to determine at least one coefficient indicative of a crop status;
• determining at least one first measurement region and at least one second measurement region within the determined area further based on the at least one coefficient or a combination thereof for carrying out the at least one measurement with the crop nutrient measurement device,
• wherein the at least one first measurement region is selected such that the at least one coefficient in the at least one first measurement region is within a first predetermined threshold from a first predetermined value of the coefficient in the determined area;
• wherein the at least one second measurement region is selected such that the at least one coefficient in the at least one second measurement region is within a second predetermined threshold from a second predetermined value of the coefficient in the determined area.