File:Absorption and excretion of salts by roots, as influenced by concentration and composition of culture solutions (1912) (16768237202).jpg

Title: Absorption and excretion of salts by roots, as influenced by concentration and composition of culture solutions
Identifier: absorptionexcret231true (find matches)
Year: 1912 (1910s)
Authors: True, Rodney H. (Rodney Howard), 1866-1940; Bartlett, Harley Harris, 1886-1960; United States. Bureau of Plant Industry
Subjects: Roots (Botany); Peas
Publisher: Washington, D. C. : Government Printing Office
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
24 ABSORPTION" AND EXCRETION OF SALTS BY BOOTS. These results indicate (1) that in solutions (Nos. 2-12) 10 times as concentrated as solutions near equilibrium concentration (Nos. 1 9 . and 13), a magnesium to calcium ratio of r is as favorable to absorp- tion as calcium alone; and (2) that the most efficient absorption takes place from solutions with magnesium and calcium present in approxi- 5 mately equivalent concentrations, i. e., in the ratio p. Since in this
Text Appearing After Image:
Fig. 12.—Seedlings of culture 3, experiment 3. experiment the solutions of equivalent concentration were 10 times as dilute as in experiments A and B, it is interesting to note that the same ratio of magnesium to calcium as in those experiments sufficed to bring about perfect root development. In the figures illustrating the more significant cultures of this series note especially the contrast between the effects of 10 M Mg and 9M 50,000 Mg + M 50,000"to -"* 50,000"* ' 50,000 and 12; cf. figs. 1 and 8); the general similarity of cultures in Ca (figs. 11 9M 50,000 231

Note About Images