Calculating Cation Exchange in a Salt Transport Model

Robbins, C.W. and Jurinak, J.J. and Wagenet, R.J. (1980) Calculating Cation Exchange in a Salt Transport Model. Soil Science Society of America Journal. 44:1195-1200.

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Abstract

A cation exchange subroutine that can be expanded to
include any number of cations was developed and interfaced
with a water flow-salt transport model that also contained a
lime and gypsum precipitation-dissolution chemistry subroutine.
The exchange subroutine was required by the complete model
to satisfactorily predict EC, SAR, and specific ion concentration
changes with time and depth for a gypsiferous and a nongypsiferous
soil irrigated with waters containing three different
CaSO₄ concentrations at two leaching fractions. In his sudy,
exchangeable Ca, Mg, Na, and K were considered. Exchangeable
K was included for me with high exchangeable and soluble K
soils and high K irrigation waters. The additional cation exchange
coefficient values needed for K exchange and a method
for their calculation is given.

Item Type:	Article
NWISRL Publication Number:	0458
Subjects:	Research methodology Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:52
Last Modified:	26 Jan 2017 17:39
Item ID:	373
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/373