Precision Agriculture (PA) improves agricultural output sustainability by watching, quantifying, and responding to temporal and spatial variability. Precision agriculture (PA) use 5Rs’ with aiming applying the Right Inputs, at the Right Amount, to the Right Place, at the Right Time, and in the Right manner. Regarding precision agriculture (PA), an integrated nutrient management (INM) system based on the STCR (Soil Test Crop Response) technique was used in a field experiment on loamy soil at Survey No. 97/3 of Sarkhej village, Kheda district, Gujarat, India during winter season of 2023. This allowed us to construct an equation for recommended dose of fertilizer used for wheat crop. Soil test data, wheat grain yield and NPK uptake by wheat crop were used for achieving four important basic parameters viz., nutrients required to produce one quintal of wheat grain (NR), contribution of nutrients from fertilizers (%CF), contribution of nutrients from soil (%CS) and contribution of nutrients from organic matter-FYM (%C-FYM). It was found that 4.43, 1.02 and 2.87 kg N, P2O5 and K2O, respectively were required for producing one quintal of wheat grain yield. The percent contribution of nutrients from soil, fertilizer and FYM were 36.2, 133.7 and 12.6 for N, 51.7, 24.8 and 3.04 for P2O5 and 23.0, 71.4 and 10.0 for K2O, respectively. With these fundamental characteristics, a fertilizer dose calculator was created for different soil test values and wheat grain production targets for NPK with and without FYM.