. Elementary principles of agriculture; a text book for the common schools. Agriculture. 58 Elementary Princi])les of Agriculture 93. Size of Soil Particles. In recent studies on Ameri- can soils, much attention has been given to the deter- mination of the size of the particles in good agricul- tural soils. Fig. 34 shows how two soils may differ in this iyj. s r/f' ^J3 ml respect. In noting the size of the soil particles, we should distinguish between the actual size of the minute particles or fragments of rocks and the soil floccules, or granules formed by the sticking to- gether of a number
. Elementary principles of agriculture; a text book for the common schools. Agriculture. 58 Elementary Princi])les of Agriculture 93. Size of Soil Particles. In recent studies on Ameri- can soils, much attention has been given to the deter- mination of the size of the particles in good agricul- tural soils. Fig. 34 shows how two soils may differ in this iyj. s r/f' ^J3 ml respect. In noting the size of the soil particles, we should distinguish between the actual size of the minute particles or fragments of rocks and the soil floccules, or granules formed by the sticking to- gether of a number of very small particles. 93a. Examination to Observe the Size of the Soil Granules. Secure a half-dozen lumps of soil from the moist layers beneath the surface, and put into a fruit jar three- fourths full of water. Screw on the top and shake vigorously for some minutes, and allow to settle. Describe the layers formed after standing one hour or more. Note the differences in size of the granules of the soil. Apply the same treatment to a handful of garden soil; to a sample of stiff clay soil. 93b. Secure a good handful of soil and moisten and work till a very thin, even paste is formed. Place in a jar. as in H 92a, and shake. Allow to stand until the particles have all settled to the bot-. 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 Ferguson, A. M. (Alexander McGowen), 1874-; Lewis, Lowery Laymon, 1869- joint author. Sherman, Tex. , Ferguson Publishing Company
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