. Soil physics and management. iuj. H7 —AciKft blade Fig. 14S.—The isolid dwk. on soils that are deficient in organic matter. It is a ver} good imple-ment to in the cultivation of alfalfa. The Acme or blade harrow (Fig. 147) is used to some extent,and is an excellent implement to pulverize and compact the soil. 534 SOIL PHYSICS AND MANAGEMENT. The bar in front, if properly adjusted, crnslies clods, while thetwisted blades stir the soil and destroy any weeds that may hayestarted. For this purpose it is better than the spike-tooth harrow.

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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1917