. The principles of plant culture; a text for beginners in agriculture and horticulture. Gardening; Botany. 70 PRINCIPLES OF PLANT CULTURE ten inches below the surface, while that of crops making large development of stem and foliage during summer, as Indian corn, sorghum, tobacco and the Cucurbitae, appeared to be shallower than in slower-growing crops. A part of the roots of many crops grow very near the surface of the ground. Branches from the main horizontal roots often grow upward as well as in other direc- tions. At the Geneva Experiment Station, nu- merous roots of sweet corn were found
. The principles of plant culture; a text for beginners in agriculture and horticulture. Gardening; Botany. 70 PRINCIPLES OF PLANT CULTURE ten inches below the surface, while that of crops making large development of stem and foliage during summer, as Indian corn, sorghum, tobacco and the Cucurbitae, appeared to be shallower than in slower-growing crops. A part of the roots of many crops grow very near the surface of the ground. Branches from the main horizontal roots often grow upward as well as in other direc- tions. At the Geneva Experiment Station, nu- merous roots of sweet corn were found within an inch of the surface, and in a tall-growing southern corn, roots of considerable size started at a depth of only half an inch. The main root of a Hubbard squash vine was traced a distance of ten feet, in which its depth varied from two to five inches. In tobacco fields, the rootlets sometimes literally protrude from .ab^eS:n;:oS!'"'"'"' ^^' '"^'^^'^ ^^ t^e Soil in warm, wet weather (231). 110. The rate of root growth in rapidly developing plants is often extremely fast. President Clark, formerly of the Massachusetts Agricultural College, concluded from very careful examinations and measurements of the roots of a squash vine grown under glass, that rootlets must have been produced at the rate of at least one thou-. Fio. 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; Moore, J. G. (James Garfield); Jones, L. R. (Lewis Ralph), 1864-1945. New York, Macmillan
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Keywords: ., bookcentury1900, bookdec, booksubjectbotany, booksubjectgardening
