Fertilizer calculator for Commercial Sod Farms developed for the Extension Soil Testing Laboratory, Institute of Food and Agricultural Sciences, University of Florida, Gainsville, FL. The app takes the soil analysis results which could either be entered manually or directly retrieved from the lab, provided the user credentials, and the sample lab number are known as inputs. Based on the Crop, and County nutrient recommendations are made. The nutrient recommendations include recommendations for Lime, Nitrogen, Phosphorus, Potassium, and Magnesium. In addition based on the acreage, and the N, P, K products of a fertilizer selected by the user, total quantity of the fertilizer to be applied is provided as output of the application.