Sodium Adsorption Ratio-Exchangeable Sodium Percentage Relationships in a High Potassium Saline-Sodic Soil

Robbins, Charles W. (1984) Sodium Adsorption Ratio-Exchangeable Sodium Percentage Relationships in a High Potassium Saline-Sodic Soil. Irrigation Science. 5:173-179.

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Abstract

Exchangeable sodium percentage (ESP) and sodium absorption ratio
(SAR) values were obtained from 692 soil samples and their saturation extract
solutions. All samples were from a Declo silt loam (coarse, loamy, mixed, mesic,
Xerollic Calciorthids) phase that was saline-sodic and very high in potassium
(K). Some samples contained as much as 80 meq K/l in the saturation paste
extract. In those samples where the Na : K ratio was less than 4 : 1 the
measured ESP was considerably lower at a given SAR than is usually observed
in high Na soils. As the soluble salts were leached from this soil in lysimeters
and under field conditions, with or without Ca amendments, the soil did not
become sodic nor have decreased infiltration rates when irrigated with low salt
water (200 µmhos /cm). The exchangeable K was more tightly held on the
exchange sites than were Ca, Mg, or Na, thus reducing the high Na effects.

Item Type:	Article
NWISRL Publication Number:	0532
Subjects:	Soil > Chemistry > Potassium Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:52
Last Modified:	13 Jan 2017 23:12
Item ID:	422
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/422