When it comes to Agri products-based Business, before you predict your demand, you really need to predict supply. Availability of raw materials. Grains, Milk, Corn, Potash. Your procurement strategies are the key here to keep the business viable. The parity of prices in domestic and international markets determine your production and distribution plan. Your sales and distribution, your production plans, your procurement plans need to be tuned accordingly. Your storage costs can be unpredictable too because of weather of surplus stocks.