This app assists in calculating a liquid or dry fertilizer blend that meets fertility goals. The user enters the desired N-P-K-S fertility for a field, and selects from available fertilizer products. The app calculates the blend requirements (tonnes of each product), the rate of application, the resulting N-P-K-S fertility, and the cost. For liquid, the app allows blend calculation by the truckload batch based on tank capacity and volume remaining at fill-up. The user can enter soil test information and target recommendations to obtain the necessary fertilizer additions.