The uses for linear programming in solving problems in farming are numerous. It is used in cropping policy, fertilizer blending for maximum efficiency and minimum cost, farm expansion by land purchase and use, and daily harvest operations. Dairy cattle and pig feed formula for optimum weight gain and minimum cost, the types of cattle to be raised, and integrating beef and crop production are just a few of the areas where computer programs have assisted farmers. The National Research Council (US) and the Agricultural Research Council (United Kingdom) have used linear programming to aid the farmers and saved them time and expense.