Document Type

Research

Abstract

Miscible displacement experiments were conducted to determine the influence of soil type on the movement of chloride and nitrate. The movement of NO" - is important in plant nutrition; Cl^-, in soil salinity. In these experiments, 100 ml of an aqueous solution containing 0.55 g of CaC1₂ and 0.35 g of Ca(NO₃)₂4H₂O was displaced through 30-cm long soil columns with 0.01N CaSO₄. Breakthrough curves, plots of the chloride or nitrate concentrations found in the effluent against the volume of effluent collected, were made. Breakthrough curves from columns of Webster, Ida, and Edina surface soils and a muck soil indicated that the velocity of chloride was greater than that of nitrate during displacement through these soils. On the other hand, breakthrough curves obtained from columns of Webster, Ida, Edina, and Clarion subsoils showed no separation of chloride and nitrate. The breakthrough curves for all soils studied differed in shape. The dispersion coefficient for chloride, calculated from the breakthrough curves, varied from 1.533 cm²/hr for the muck soil to 0.094 cm²/hr for the Ida, C horizon, soil. The experimentally determined dispersion coefficients were used to calculate theoretical chloride distributions for the muck, Ida, and Webster soils.

Publication Date

1967

Journal Title

Proceedings of the Iowa Academy of Science

Volume

Issue

First Page

130

Last Page

141

Copyright

Language

File Format

application/pdf

Recommended Citation

Corey, John C.; Kirkham, Don; and Nielsen, Donald R. (1967) "The Movement of Chloride and Nitrate through Certain Iowa Soils," Proceedings of the Iowa Academy of Science, 74(1), 130-141.
Available at: https://scholarworks.uni.edu/pias/vol74/iss1/23

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The Movement of Chloride and Nitrate through Certain Iowa Soils

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