. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 1.—Alfalfa roots from a plat clipped three times during the second season. Table 1.—Effect of frequency of clipping on the vitality of alfalfa plants at Redfield, S. Dak., in 1916 and 1917. Treatment during the season of 1916. Stand (per cent). 1916 1917 Mortality, winter or 1916-17 (per cent). CUpped 3 times during season CUpped when 6 inches tall, 7 times during season Clipped 18 times during season 100 100 100 1+ 17 92 98+ The data given in Table 1 show that the plants from the plats clipped 7 and 18 times were
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 1.—Alfalfa roots from a plat clipped three times during the second season. Table 1.—Effect of frequency of clipping on the vitality of alfalfa plants at Redfield, S. Dak., in 1916 and 1917. Treatment during the season of 1916. Stand (per cent). 1916 1917 Mortality, winter or 1916-17 (per cent). CUpped 3 times during season CUpped when 6 inches tall, 7 times during season Clipped 18 times during season 100 100 100 1+ 17 92 98+ The data given in Table 1 show that the plants from the plats clipped 7 and 18 times were so weakened in vitality by the frequent clippings that they suffered almost complete mortality the following winter. Although considerable winterkilling occurred in the plat harvested three times for hay, a satisfactory stand remained. In October, 1916, at the close of the period of treatment, 12 plants were removed from each of the plats and the root systems photo- graphed. The plants in each case were taken consecutively from representative areas. The plants from the plat harvested 3 times during the season showed a much larger and stronger root growth. 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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