. Elementary lessons in the physics of agriculture . Fig. 62. 203. The Harrow.— As implements of tillage, harrows are used to secure several quite distinct ends: 1. To produce a shallow seed-bed. 2. To dry the soil preparatory to seeding. 3. To render the surface of the ground more even. 4. To pulverize the soil and secure a more even texture. 5. To cover seed. 6. To destroy young weeds. 7. To work manure into the surface soil. 8. To aerate the soil. 9. To check evaporation by developing a soil mulch. According as one or another of these ends is to be secured, uhe character of the harrow shoul

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. Elementary lessons in the physics of agriculture . Fig. 62. 203. The Harrow.— As implements of tillage, harrows are used to secure several quite distinct ends: 1. To produce a shallow seed-bed. 2. To dry the soil preparatory to seeding. 3. To render the surface of the ground more even. 4. To pulverize the soil and secure a more even texture. 5. To cover seed. 6. To destroy young weeds. 7. To work manure into the surface soil. 8. To aerate the soil. 9. To check evaporation by developing a soil mulch. According as one or another of these ends is to be secured, uhe character of the harrow should be different. In Figs. 63, G-i and 65 are represented three of the strongly marked types of harrows. 204. The Disc Harrow.— This harrow, Fig. 63, is dis- tmctly a seed-bed-preparing and soil-drying tool and, in its adjustable ty])es, may be made to work to a remarkable depth in fall plowing and in corn ground in the spring. An immense

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Keywords: ., bookcentury1800, bookdecade1890, bookpublishermadis, bookyear1894