. Grasses of North America [microform] : chapters on the physiology, composition, selection, improving and cultivation of grasses, management of grass lands, also chapters on clovers, injurious insects and fungi. Grasses; Forage plants; Graminées; Plantes fourragères. ROOT-HAIRS. Root-hairs are continuations of some of the outer cells of the younjjer roots and are brought into very close contact with the particles of soil. Their number depends much on the nature of the medium in which the roots are grown. Where the soil is rich, moist and porous, root-hairs are abundant. They are very short-li
. Grasses of North America [microform] : chapters on the physiology, composition, selection, improving and cultivation of grasses, management of grass lands, also chapters on clovers, injurious insects and fungi. Grasses; Forage plants; Graminées; Plantes fourragères. ROOT-HAIRS. Root-hairs are continuations of some of the outer cells of the younjjer roots and are brought into very close contact with the particles of soil. Their number depends much on the nature of the medium in which the roots are grown. Where the soil is rich, moist and porous, root-hairs are abundant. They are very short-lived, often lasting only for a few days, new hairs from other rootlets taking their places. The upper and older portions of the roots merely serve to hold the plant in position and act as conductors for the trans mission of matter to the leaves of the plant and some of it back again to the newer roots. The reader should consult fig- ure 2, representing a young wheat plant carefully lifted with the sand which is held fast by its close contact with the root-h airs. T h e tips of the roots have not put forth hairs and hence they are Fuj. 3.— Roots of young Fro. 3.—Plant a little older still naked, wheat plant lifted from the with soil clinging to the soil, holding soil by the root- younger parts, but not to FiffUre 3 rcprc- hairs excepting near the the older parts as there the ^ ^ apex where the hairs have root-hairs have perished. c,,„fci ^^ya v^nia f\f o not yet been produced. seuis lue rouib ui u. 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 Beal, W. J. (William James), 1833-1924. New York : H. Holt
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
