. Chemical investigations of the tobacco plant. Tobacco; Plants. 74 Connecticut Experiment Station Bulletin 442 their weight of water, those of the 90 percent ammonia plants with times, and again the intermediate plants lie along a very nearly straight line between these limits. The substitution of ammonium for nitrate ion in the culture solution, therefore, gave rise to plants characterized by progressively increasing degrees of hydration. This implies, in turn, a fundamental difference in chemical composition which extended to both leaf and stalk. As a consequence of the increase in hyd
. Chemical investigations of the tobacco plant. Tobacco; Plants. 74 Connecticut Experiment Station Bulletin 442 their weight of water, those of the 90 percent ammonia plants with times, and again the intermediate plants lie along a very nearly straight line between these limits. The substitution of ammonium for nitrate ion in the culture solution, therefore, gave rise to plants characterized by progressively increasing degrees of hydration. This implies, in turn, a fundamental difference in chemical composition which extended to both leaf and stalk. As a consequence of the increase in hydration of the tissues, it is clear that the organic solids, in terms of grams per kilo of fresh weight, decreased as the proportion of ammonia in the culture solu- tion was increased. Curves for these relationships are not plotted, but the data are given in Table 4; for the leaves the concentration dropped from gm. of organic solids per kilo of fresh tissue in the nitrate plants, along a nearly straight line, to gm. for the 90 percent ammonia plants. The data for the stalks give a less satisfactorily straight line, but there was a more or less steady drop from to gm. per kilo. 700 450 200 70 12 u <D -P P. c n p.* °2 Organic solids. 200 'Zi£.-_-2 VTater. 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 Vickery, Hubert Bradford, b. 1893. [New Haven] : Connecticut Agricultural Experiment Station
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