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Show REDUCING EFFECTS OF WIND Flnt Prlnclp'e Is to Keep 6urface of Ground Corrugated Uneven-nets Uneven-nets Impede. A dry land country Is always a land with much wind, and the dryer the season the steadier and the harder the wind blows. The first principle for reducing the damaging effect of the wind Is to the surface of the ground corrugated. Engineers, In measuring dsop mountain moun-tain streams, often find that whero the water Is moving bo swiftly on the surface that a man cannot stand against It, there la almost no current at the bottom, where the velocity Is checked by stones. It la on the same principle that the surface of dry land Bhould bo kept corrugated; the tin- j evenness Impedes the motion of the wind. When freshly plowed dry land soils are rolled with a smooth roller, the wind moves as fast along the surfaco of the soli as It does at the height of a man above It, and will often sweep the soil off the field as deeply as It , has been plowed. The subsurface packer leaves the ) ground more deeply corrugated than . tho grain drill. The packer wheels have Iron spokes, and while the rim fines and packs the soil, making a good seed bed, the spokes bring small clods to the surface, and packed ground has both the corrugations and the clods to retard the wind. The writer has many times seen a high wind blowing across a field that had Just been treated with a subsurface packer, and a little fine dust only would be sifting around the clods and across the low ridges, while from adjoining ad-joining fields, left smooth, the dubt was rising In cIouiIh. All grain should bo drilled In with the furrows running at right angles to tho prevailing winds. Colorado Experiment Ex-periment Station, Bulletin 143. |