These are simple rules, but the practice of them is opening up the great semi-arid regions, not of the United States only, but of the whole earth. Western Canada, a large part of Australia, the Kalahari Desert of Africa, and many parts of Asia, which are all semi-arid, will in time become productive instead of barren.
It must be remarked that the grains of the East could not withstand the severe winters in a large part of the Northwest, so the Department of Agriculture sent men all over the world to find drought-and-cold-resisting grains. They found a hard winter wheat, the most nutritious in existence, which is now growing all the way from the Dakotas to the Pacific Ocean, producing crops far above the yield of the eastern states. 50,000,000 bushels of this wheat was raised in 1907.
The soil is the natural disintegrated rock, rich in the mineral elements, but lacking in decayed vegetable matter. The crops soon exhaust the nitrogen, and as clover and the common alfalfas can not grow there, the problem of finding legumes has been the most serious one facing this new region; but in Siberia the Agricultural Department has recently found a new clover and three varieties of alfalfa that will stand the cold, and Secretary Wilson believes that these will solve the problem.
Every acre brought under cultivation adds to the world's food supply. Can we even dream of what it will mean when 200,000,000 acres are added to the farm lands of this continent? It means prosperity for the farmers themselves, homes for those who are now crowded in cities, work for the idle, and food for the hungry. It means wealth and happiness for thousands now living and millions yet to come.
REFERENCES
Lands. Report National Conservation Commission.
Soil Wastage. Chamberlain. Report White House Conference of Governors.
Conservation of Soils. Van Hise. (Same.)
Commercial Fertilizers. Dept. of Agriculture Bulletin, 44.[A]
The Liming of Soils. Dept. of Agriculture Bulletin, 57.