OnMRK (Ohio Nutrient Managemnt Record Keeper) allows fertilizer applicator(s) to enter the fertilizer type, rate, amount applied, total acres, soil conditions, application method, weather conditions when applied, using a tablet or smartphone. OnMRK allows applicator to enter Farms and Fields and their locations. OnMRK uses GEO location settings to provide weather information for the area providing feedback to identify appropriate conditions to apply fertilizer.