. An introduction to vegetable physiology. Plant physiology. THE CONSTITUENTS OF THE ASH OP PLANTS 173 the plants injuriously. Too great a quantity of salts, however, becomes deleterious. The effect of omitting any particular constituent can be examined by making up the culture-fluid as -Plants of Buckwheat cultivated in various Nutmtive Solutions. 1, normal solution containing all necessary salts; 2, solution containing the same salts as 1, except potassium compounds ; .3, solution of same composi- tion as 1, except that sodium salts have been substituted for potassium compounds; 4
. An introduction to vegetable physiology. Plant physiology. THE CONSTITUENTS OF THE ASH OP PLANTS 173 the plants injuriously. Too great a quantity of salts, however, becomes deleterious. The effect of omitting any particular constituent can be examined by making up the culture-fluid as -Plants of Buckwheat cultivated in various Nutmtive Solutions. 1, normal solution containing all necessary salts; 2, solution containing the same salts as 1, except potassium compounds ; .3, solution of same composi- tion as 1, except that sodium salts have been substituted for potassium compounds; 4, solution of same composition as 1, except that no calcium salts are present; 5, solution containing no compounds of nitrogen. Fig. 89 shows in (1) a plant growing in such a fluid as is described above ; (2) shows a similar plant cultivated in a. 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. Philadelphia, P. Blakiston
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