The effects of lime, gypsum and lime/gypsum combinations, after 2.5 years, on two sodic soils under dryland cropping conditions in the Macquarie Valley, NSW

Bennett, J. McL. and Cattle, S. R. and Singh, B. (2012) The effects of lime, gypsum and lime/gypsum combinations, after 2.5 years, on two sodic soils under dryland cropping conditions in the Macquarie Valley, NSW. In: 5th Joint Australian and New Zealand Soil Science Conference: Soil Solutions for Diverse Landscapes (SSA 2012), 2-7 Dec 2012, Hobart, Australia.

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Abstract

While gypsum, and to a lesser extent lime, are reported as ameliorants for soil sodicity, there is relatively little information concerning the use of these ameliorants in combination. This study investigates the use of lime and gypsum combinations on selected soil properties relating to sodicity on two different soils used for dryland cropping in the Macquarie Valley of New South Wales (NSW). Lime and gypsum treatments were applied to two soils (lime [L] and/or gypsum [G], applied at t/ha rates: L0G0 [control], L2.5G0, L0G2.5, L2.5G2.5, L2.5G5, L5G2.5, and L5G5) that were sampled after 2.5 years and analysed for soil pH, EC and aggregate stability. Changes in pH and EC, as well as correlations, suggest that lime has dissolved more readily in the presence of gypsum. While aggregate stability was not significantly enhanced, significant relationships between soil EC and aggregate stability were found.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: Yes
Item Status: Live Archive
Additional Information: No evidence of copyright restrictions preventing deposit.
Depositing User: Mr John Bennett
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 30 Nov 2012 04:41
Last Modified: 29 Oct 2014 03:56
Uncontrolled Keywords: acidic soils; lime; gypsum; dryland soils
Fields of Research (FOR2008): 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
05 Environmental Sciences > 0503 Soil Sciences > 050305 Soil Physics
05 Environmental Sciences > 0503 Soil Sciences > 050302 Land Capability and Soil Degradation
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
URI: http://eprints.usq.edu.au/id/eprint/22155

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