. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. SOILS. 33 others in wet soils. At the opening of the spring many of the pegs which were driven in the wet soil will be found partly raised out of the ground, and some of them will be found lying upon the surface, as. shown in Fig. 2. Those driven into well-drained soil will be found to have been but slightly moved by the frost. The heaving of the soil has much to do with the un- settled condition of undrained dirt roads, for the reason that the soil grains becom
. Engineering for land drainage. A manual for laying out and constructing drains for the improvement of agricultural lands. Drainage. SOILS. 33 others in wet soils. At the opening of the spring many of the pegs which were driven in the wet soil will be found partly raised out of the ground, and some of them will be found lying upon the surface, as. shown in Fig. 2. Those driven into well-drained soil will be found to have been but slightly moved by the frost. The heaving of the soil has much to do with the un- settled condition of undrained dirt roads, for the reason that the soil grains become completely disarranged and thrown out of their natural position so that the com- pactness of the load-bearing surface of the road is de- stroyed. Conservatio7t of Soil Moisture, While the removal of surplus moisture from the soil is of first importance, the retention of a proper quantity is equally necessary. The object of underdrainage is to secure and maintain a golden mean between a dry and a wet soil. All observing and thorough cultivators are particular during the growing season to give the soil a thorough surface cultivation as soon after every rain as practicable. This pulverization of the surface —the finer the better—has been found to serve the pur- pose of a mulch in dry weather, and to be conducive to plant growth especially in underdrained 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 Elliott, Charles Gleason, 1850-1926. New York, J. Wiley
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