The effect of gypsum on cation exchange in two red duplex soils
- 1 January 1985
- journal article
- research article
- Published by CSIRO Publishing in Soil Research
- Vol. 23 (1), 61-74
- https://doi.org/10.1071/sr9850061
Abstract
Gypsum at rates of up to 15 t ha-1 was applied to the surface 10 cm of two red duplex soils in northern Victoria. At both sites, approximately five years after application, the following changes in soil properties were established: 1. Only when 15 t ha-1 of gypsum was applied was exchangeable sodium in the upper 25 cm significantly decreased. 2. Exchangeable magnesium was not decreased at depths greater than 15 cm. After five years only the 15 t ha-1 treatments still contained some undissolved gypsum in the A horizon. Of the gypsum that had dissolved, 53% had been involved in exchange. This represented an efficiency of exchange of 26-34%, based on the ratio of sodium replaced to calcium dissolved. At both sites over this five-year period, the mean solubility of gypsum from the 15 t ha-1 treatment was 120-130 mm of rainfall per t of gypsum.Keywords
This publication has 9 references indexed in Scilit:
- Drainage and desalinization of heavy clay soil in PortugalAgricultural Water Management, 1982
- Gypsum Dissolution and Sodic Soil Reclamation as Affected by Water Flow VelocitySoil Science Society of America Journal, 1982
- Irrigation Water Requirement for Dissolution of Gypsum in Sodic SoilSoil Science Society of America Journal, 1980
- THE INFLUENCE OF MAGNESIUM AND OF EASILY WEATHERED MINERALS ON HYDRAULIC CONDUCTIVITY CHANGES IN A SODIC SOILEuropean Journal of Soil Science, 1979
- THE INFLUENCE OF MAGNESIUM IN SALINE AND SODIC SOILS: A SPECIFIC EFFECT OR A PROBLEM OF CATION EXCHANGE?European Journal of Soil Science, 1979
- Effects of Clay Type and Content, Exchangeable Sodium Percentage, and Electrolyte Concentration on Clay Dispersion and Soil Hydraulic ConductivitySoil Science Society of America Journal, 1978
- The determination of ammonium and chloride by an auto‐analyser for the measurement of cation exchange capacity of soilsCommunications in Soil Science and Plant Analysis, 1976
- Relative significance of electrolyte and cation exchange effects when gypsum Is applied to a sodic clay soilSoil Research, 1976
- STUDIES ON EXCHANGE OF SODIUM FROM SOILS BY LEACHING WITH CALCIUM SULFATESoil Science, 1968