. Dry land farming . THE DOUBLE DISC DRILL. Courtesy American Seeding Machine Co., Springfield, Ohio. 2 to 3 inches. It is usually composed of fine soil, but the ideal dust mulch is composed of soil that includes soil particles as fine as dust, intermingled with soil gran- ules. Soil granules means soil in which a number of soil particles adhere so as to form small lumps of soil. When the soil is destitute of these soil granules it is much liable to lift more or less with the wind and to run together and become im'pacted by rainfall so that it en- crusts. When composed wholly of soil granules,
. Dry land farming . THE DOUBLE DISC DRILL. Courtesy American Seeding Machine Co., Springfield, Ohio. 2 to 3 inches. It is usually composed of fine soil, but the ideal dust mulch is composed of soil that includes soil particles as fine as dust, intermingled with soil gran- ules. Soil granules means soil in which a number of soil particles adhere so as to form small lumps of soil. When the soil is destitute of these soil granules it is much liable to lift more or less with the wind and to run together and become im'pacted by rainfall so that it en- crusts. When composed wholly of soil granules, it does
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