Dry farming in western Canada Dry farming in western Canada . dryfarminginwes00brac Year: 1921 108 DRY FARMING turning their vegetative parts under the furrow slier. The roots are cut by the sharp share and the vegetation is turned under by the upward sloping, outward curv- 37a.—The Disc Plow. ing mouldboard (Fig 37). The covering is facilitated by having a straight-edged furrow which the coulter (Fig. 37C) makes. The effectiveness of the covering may be increased by the jointer or skim coulter, or by drag chains. The surface litter, of whatever form, is disposed of by thorough covering. T
Dry farming in western Canada Dry farming in western Canada . dryfarminginwes00brac Year: 1921 108 DRY FARMING turning their vegetative parts under the furrow slier. The roots are cut by the sharp share and the vegetation is turned under by the upward sloping, outward curv- 37a.—The Disc Plow. ing mouldboard (Fig 37). The covering is facilitated by having a straight-edged furrow which the coulter (Fig. 37C) makes. The effectiveness of the covering may be increased by the jointer or skim coulter, or by drag chains. The surface litter, of whatever form, is disposed of by thorough covering. The soil is pulverized least by a long sloping mould- hoard (breaker bottom) and most by an abrupt mould- hoard (stubble bottom). The former is used in sod plowing because it turns a sod furrow better and the draft is lighter. The Latter is used in stubble land be- cause it turns the stubble furrow belter and pulverizes more. (Fig. 37.). When it IS desired to loosen lip heavy subsoil deep plowing may be practised or a subsoil plow or subsoil attachment (Fig. 37B) may follow in the furrow of the ordinary plow. Kinds of Plows.—There are mouldboard and disc plows; and among the mouldboard types there are sod
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