This calculation tool is a simple method used in various fields, particularly in agriculture and animal nutrition, to determine the proportions of two ingredients needed to achieve a desired nutrient concentration in a final mixture. The process involves creating a square, placing the desired concentration in the center, and the concentrations of the two ingredients at the left corners. Subtracting diagonally yields the relative amounts of each ingredient needed. For example, to create a feed mixture with 16% protein using one ingredient at 20% protein and another at 10%, the calculation would dictate the proportions of each ingredient required.
The technique provides a straightforward and visual way to balance feed rations, optimize fertilizer blends, and achieve specific target concentrations in mixtures. Its value lies in its simplicity, making it accessible to individuals without advanced mathematical training. Historically, methods like this have been crucial in optimizing resource utilization and reducing waste, especially in contexts like animal feeding where precision directly impacts animal health and productivity. This approach allows for cost-effective formulation by minimizing reliance on expensive ingredients and maximizing the utility of readily available resources.