Dry farming in western Canada Dry farming in western Canada dryfarminginwes00brac Year: 1921 28G DRY FARMING the older plains States between Kansas and Western Canada. 239A. The Value of Manure. What lias been1 said about the advantages of organic matter in Chapter 111 and in other places applies in a greater degree to manure. The value of this fertilizer is not chiefly in the food Fig. 95.—Cereal Test Plots at Beaver Lodg Northern Alberta. Grande Prairie District, material it carries but rather in its physical and biol- ogical effects on the soil. It not only adds sonic elements of plant
Dry farming in western Canada Dry farming in western Canada dryfarminginwes00brac Year: 1921 28G DRY FARMING the older plains States between Kansas and Western Canada. 239A. The Value of Manure. What lias been1 said about the advantages of organic matter in Chapter 111 and in other places applies in a greater degree to manure. The value of this fertilizer is not chiefly in the food Fig. 95.—Cereal Test Plots at Beaver Lodg Northern Alberta. Grande Prairie District, material it carries but rather in its physical and biol- ogical effects on the soil. It not only adds sonic elements of plant food but it improves the structure of the soil, increases its moisture-holding power, lessens the tend- ency 1(> blow and, perhaps most important of all. in- creases the activity and the number of the desirable soil bacteria, that perform the important function of making plant food available. According to Hopkins* 'a ton of fresh-mixed cattle and horse manure contains about 500 pounds of dry matter, 10 pounds of nitrogen. 2 pounds of phosphorus, and 8 pounds of potassium. . . . By Leaching and fer- mentation the dry matter, nitrogen, and potassium are lost in approximately the same proportion, but the phos- phorus is lost only about half as rapidly, so that one ton *In 'Soil Fertility and Permanent Agriculture.''
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