It is well recognized in the field of soil science that a knowledge of the amounts and relative proportions of the exchangeable cations in the soil is indispensable in studies dealing with the chemical and physical behavior of soil or with soil fertility. While the need for more rapid methods permitting analysis of large numbers of soil samples has resulted in the development of rapid microchemical methods (11, 12) and spectrochemical procedures (5, 6, 10), the analytical procedures are time-consuming and hampered by the wide range of concentrations among the constituents. The desirability of greater rapidity and simplicity of analysis without a corresponding impairment of accuracy and precision has led to this investigation of direct photoelectric measurements of spectral radiations as an analytical procedure for the determination of the exchangeable cations of soils.
Proceedings of the Iowa Academy of Science
©1946 Iowa Academy of Science, Inc.
Heidel, Robert H.
"Direct Photoelectric Spectrochemical Determination of Exchangeble Bases of Soil,"
Proceedings of the Iowa Academy of Science, 53(1), 211-223.
Available at: https://scholarworks.uni.edu/pias/vol53/iss1/26