Dry farming in western Canada Dry farming in western Canada . dryfarminginwes00brac Year: 1921 THE PRINCIPLES OP TILLAGE Soil Firmers. 117 Among the implements that firm the soil and thus crush lumps or lessen the air spaces, or pack the soil about the seed, are the home-made planker or scrubber and the press attachment for drills. All of these are soil firmers or clod crushers of different degrees of ef- ficiency and of vastly different cost. One may fit certain specific soil conditions better than another. Each has a place in the economy of some particular farm and most

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