. Principles of plant culture; an elementary treatise designed as a text-book for beginners in agriculture and horticulture. Horticulture; Botany. The Moot and the Soil. 71 Each root-hair consists of a single elongated cell (Fig. 30), and is filled with protoplasm, as are the cells in other living parts of the plant (13). As the ex- ti-cmity of the root advances through the soil by growth, new root-hairs are formed in front of the older ones, while those farthest back as J^ rapidly die off, so that only a short portion of ^1 a rootlet bears root-hairs at any one time. In Pig. 27 root-hairs are
. Principles of plant culture; an elementary treatise designed as a text-book for beginners in agriculture and horticulture. Horticulture; Botany. The Moot and the Soil. 71 Each root-hair consists of a single elongated cell (Fig. 30), and is filled with protoplasm, as are the cells in other living parts of the plant (13). As the ex- ti-cmity of the root advances through the soil by growth, new root-hairs are formed in front of the older ones, while those farthest back as J^ rapidly die off, so that only a short portion of ^1 a rootlet bears root-hairs at any one time. In Pig. 27 root-hairs are visible in the left glass, and in Pig. 6 they may be seen on the hypo- cotyl of some of the germinating corn grains. In Fig. 29A and in Fig. 28 the parts of the root bearing root-hairs are indicated by the sand which adheres to these parts. It is usually difficult to see the root-hairs of plants grow- ing in the natural soil, but they may some- Hngs of turnip times be discovered with the help of a pocket showing root- magnifying glass by carefully removing the Frank and soil particlcs about the younger roots, when Tschirch). ^j^g silky network of root-hairs may be seen filling the smaller pores of the soil or enveloping the soil particles. Pig. 30 shows a magnified root-hair Fie. 29. Seed-. FiG. 30. Magnified root-hair of wheat, in contact with soil particles. (After Sachs). of the wheat plant, closely attached to some particles of soil. The root-hairs are able to take up water freely, even from soil that does not appear very wet, because each soil particle is enveloped in a thin layer of water (91). Still more interesting is the fact, that root-hairs. 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 Goff, E. S. (Emmett Stull), 1852-1902. Madison, Wis. , The Author
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