100-5 A Comparison of Calcium Chloride and Potassium Chloride as Remedial Treatments for Two Sodic Soils.

Poster Number 923

See more from this Division: S02 Soil Chemistry
See more from this Session: General Soil Chemistry
Monday, November 1, 2010
Long Beach Convention Center, Exhibit Hall BC, Lower Level
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Daniel Ferreira, 1376 Storrs Road, Unit 4067, University of Connecticut, Storrs, CT and Cristian Schulthess, University of Connecticut, Storrs, CT

Soil Science Society of America Annual Meeting: October 31 November 4, 2010, Long Beach, CA

Abstract

A Comparison of Calcium Chloride and Potassium Chloride as Remedial Treatments for Two Sodic Soils

(1) Daniel R. Ferreira, Department of Plant Science, University of Connecticut

daniel.ferreira@uconn.edu

(2) Cristian P. Schulthess, Department of Plant Science, University of Connecticut

c.schulthess@uconn.edu

The Nanopore Inner-Sphere Enhancement (NISE) effect can cause Na to adsorb strongly within the small nanopore channels of zeolite minerals. In those cases where Na is being retained strongly due to NISE, K can outperform Ca in desorbing Na. The interlayers of certain clay minerals can also create nanoporous spaces and may, therefore, induce a NISE effect that causes Na to adsorb strongly. Using K and Ca, a series of Na desorption experiments were conducted on two clay-rich sodic soils, one collected in North Dakota and the other collected in Utah. The effectiveness of K and Ca at desorbing native Na from these soils was compared. Whereas Ca is generally added as gypsum (CaSO4) to remediate sodic soils, this study looks at the usefulness of potash as an complementary remedial treatment for sodic soils.

See more from this Division: S02 Soil Chemistry
See more from this Session: General Soil Chemistry