. Soils, their properties and management. Soils. SOME FHTSICAL PROPSRTmS OF THE SOIL 109 to two different arrangements: (1) in columnar order, with each particle touched in four points by its neighbors; and (2) the oblique, in which each particle is in contact with six of its neighbors. The possible pore space in the first case is per cent, while that in the second case is per cent. The amount of this pore space is uninfluenced by the size of the particles, provided they are round and all of the same volume. L jL 3 3 LdL ^ \m Ml 3 J L A. .J ^. IP •#® ®#^ ^'iP mfmmfmm > Fig 17 —
. Soils, their properties and management. Soils. SOME FHTSICAL PROPSRTmS OF THE SOIL 109 to two different arrangements: (1) in columnar order, with each particle touched in four points by its neighbors; and (2) the oblique, in which each particle is in contact with six of its neighbors. The possible pore space in the first case is per cent, while that in the second case is per cent. The amount of this pore space is uninfluenced by the size of the particles, provided they are round and all of the same volume. L jL 3 3 LdL ^ \m Ml 3 J L A. .J ^. IP •#® ®#^ ^'iP mfmmfmm > Fig 17 — Ideal arrangements of spherical particleb, showing, from left to right, columnar, oblique, compact, and granular orders. To any one of practical experience it is a well-known fact that the soil particles are not homogeneous as to size, and neither do all the particles function as simple grains, being gathered together in groups called granules, or crumbs. A small particle of soil may be made up of a number of very small grains. This will modify the ideal condition as described above, giving two additional conditions — first, a mixture of spherical grains of differ- ent sizes, and, secondly, a condition in which the large grains are complexes made up of numerous small particles. A mixture such as is presented by the first of these con- ditions, in which the small grains fit in between the larger ones, will result in a reduction of pore space. The pore space will fall below per cent and approach zero. A real soil having such restricted pore space is. 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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