Abstract
The application of the most important branch of economic theory because it helps to identify the factors that explain consumer preference for purchases of various goods and services within the country and what are the factors affecting the demand such as changes in prices and wages, and is one of the most important sources of food in the world that existed since the dawn of history, and is considered crop of wheat and rice of the most important grain crops that consume large quantities in the world as a result of their nutritional value high and contains vital energy to the human body so it has Dipt countries of the world to work Gahd to meet human needs of these Asalatan through the empowerment of the planned economic forecasting future demand and thus the ability to secure the corresponding display this on the one hand and the other hand, the expansion of development projects horizontally and vertically to achieve the well-being of the highest level of society.
