. Elementary principles of agriculture : a text book for the common schools . Fig. 13. Diagram of a portion of soil penetrated bv root hairs, h, h', arising from root, e. At z, s, s' the hair has grown into contact with some of the soil particles, T, which are surrounded by water films (shaded by parallel lines). After Sachs. but bends to and fro in a sort of circle, taking advantage of the small openings between the soil par- ticles. It is covered with a delicate root-cap. As the root lengthens, the cells of the cap are rubbed off, but new ones are formed to take their place. Only the region
. Elementary principles of agriculture : a text book for the common schools . Fig. 13. Diagram of a portion of soil penetrated bv root hairs, h, h', arising from root, e. At z, s, s' the hair has grown into contact with some of the soil particles, T, which are surrounded by water films (shaded by parallel lines). After Sachs. but bends to and fro in a sort of circle, taking advantage of the small openings between the soil par- ticles. It is covered with a delicate root-cap. As the root lengthens, the cells of the cap are rubbed off, but new ones are formed to take their place. Only the region in front of the root-hairs has the power of lengthening. (Fig. 14.) 24. Absorption of Water by Seeds. Seeds absorb water from the soil particles. When dry seeds are placed in a bed of moist sand or loam, the littie film of moisture that covers the soil particles is absorbed by the seeds.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
