. Soils, their properties and management. Soils. 632 SOILS: PROPWBTIES AMD MANAGEMENT renewed and the excess water is permitted to pass away quickly in the drainage channels. .V,-35( J 5-'. Wet area ^ """"* *â. Fig. 63âArea of land ncaily level, but having compact subsoil witli undulating subbuiface, thereby caubing wet pockets that force plants to foim short roots. Weeds are abundant m such areas. Drainage removes the water and permits deeper penetration of the plant loots, thus enlarging their feeding zone. 7. The improved ventilation and higher temperature due to drainag
. Soils, their properties and management. Soils. 632 SOILS: PROPWBTIES AMD MANAGEMENT renewed and the excess water is permitted to pass away quickly in the drainage channels. .V,-35( J 5-'. Wet area ^ """"* *â. Fig. 63âArea of land ncaily level, but having compact subsoil witli undulating subbuiface, thereby caubing wet pockets that force plants to foim short roots. Weeds are abundant m such areas. Drainage removes the water and permits deeper penetration of the plant loots, thus enlarging their feeding zone. 7. The improved ventilation and higher temperature due to drainage promote the activity of decay organisms, by which fresh organic matter is changed into forms that may be used as food by crops. This aids in the formation of humus, with its beneficial physical effects on the soil 8. The higher temperature, better ventilation, better distribution of moisture and of decayed organic matter, together with the deeper penetration of roots, make avail- able a larger amount of mineral elements from the soil particles. 9. It may now be recognized that there is a distinct sanitary aspect to soil management. The accumulation of materials of a toxic nature is promoted by poor drain- age, and their destruction is hastened, and perhaps in part their formation is prevented, by the conditions that accompany good soil drainage. 10. Drainage reduces heaving. Heaving, or the lifting of crops by frost action in the soil, indicates the presence. 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 Lyon, T. L. (Thomas Lyttleton), 1869-1938; Fippin, Elmer O. (Elmer Otterbein), 1879-1949; Buckman, Harry Oliver, 1883-. New York, Macmillan
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Keywords: ., bookauthorlyontlth, bookcentury1900, bookdecade1910, bookyear1915
