food supply
Friday, March 23rd, 2012Agriculture is, locally, the epicenter of many rural economies.The main source of food supply in the world is agriculture, including crops, livestock, fisheries and forestry. With agriculture is achieved uncontrolled feed some 500 million people, hence, to feed the current world population of 6 billion people isnecessary to resort to systematic agriculture.On the other hand, agriculture is, locally, the epicenter of many rural economies. Forthe 2,800 calories per person per day which requires proper nutrition, it takes an average of 1,000 cubic meters (m3) of water.Most of agriculture depends on rainfall, but irrigated land accounts for about one fifth of the total arable area in developing countries. Irrigation consumes about 15% ofagricultural water, amounting to about 2000-2500 cubic kilometers (km3) annually. Indeveloping countries, irrigated land occurred in 1998, two fifths of all crops and three fifths of the grain. food supply These are the most important crop, providing 56% of calories consumed. Oilseedsare in order of importance.Developed countries account for about 25% of the irrigated areas of the world.Since the population of these countries is growing slowly, most of the development in irrigation be carried out in the developing world, where population growth is high.The United Nations Report on the Development of Water Resources in the World(WWDR) provides a breakdown by country, key indicators of national food supply.