. Effective farming; a text-book for American schools. Agriculture. Soils • 41 21. Control of soil-water by cropping methods. — As may be inferred from the foregoing statements, the control of water is an important factor in keeping soil in the best condition for profitable crop production. The farmer can increase water for crops by reducing the loss due to run-off and to percolation, by reducing the quantity evaporated from the surface, and by improving the structure of the soil, thus making it possible for the soil to retain more water. Reducing run-off losses. — When land is rather impervio
. Effective farming; a text-book for American schools. Agriculture. Soils • 41 21. Control of soil-water by cropping methods. — As may be inferred from the foregoing statements, the control of water is an important factor in keeping soil in the best condition for profitable crop production. The farmer can increase water for crops by reducing the loss due to run-off and to percolation, by reducing the quantity evaporated from the surface, and by improving the structure of the soil, thus making it possible for the soil to retain more water. Reducing run-off losses. — When land is rather impervious to water and in regions of hesivy rainfall, the amount of water lost by run-off from the surface may be excessive, if proper. Fig. 16. — A badly washed field. precautions are not taken to reduce it. The loss is occasioned largely by the water not entering the soil. One remedy is proper cultivation. If the surface of the soil is hard and com- pact and all tillage operations are shallow, there is less oppor- tunity for water to enter than if the surface is loose and the soil has been cultivated to a good depth. On hilly land the quantity of water retained can be influenced by lajdng the furrows to encircle the hill, thus making it possible for the water to be retained on the surface until much of it has time to soak into the soil. This is known as contour plowing. In sections in which the soil washes readily, terraces, which are low ridges of earth encircling the slope at nearly a perfect level, are made on the slopes. Along these terraces. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sampson, Harry Oscar, 1879-. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
