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Land use and management influences on surface soil organic carbon in Tasmania

Citation

Cotching, WE and Oliver, G and Downie, M and Corkrey, R and Doyle, RB, Land use and management influences on surface soil organic carbon in Tasmania, Soil Research, 51, (8) pp. 615-630. ISSN 1838-675X (2013) [Refereed Article]

Copyright Statement

Copyright 2013 CSIRO

DOI: doi:10.1071/SR12251

Abstract

The effects of environmental parameters, land-use history, and management practices on soil organic carbon (SOC) concentrations, nitrogen, and bulk density were determined in agricultural soils of four soil types in Tasmania. The sites sampled were Dermosols, Vertosols, Ferrosols, and a group of texture-contrast soils (Chromosol and Sodosol) each with a 10-year management history ranging from permanent perennial pasture to continuous cropping. Rainfall, Soil Order, and land use were all strong explanatory variables for differences in SOC, soil carbon stock, total nitrogen, and bulk density. Cropping sites had 2935% less SOC in surface soils (00.1 m) than pasture sites as well as greater bulk densities. Clay-rich soils contained the greatest carbon stocks to 0.3m depth under pasture, with Ferrosols containing a mean of 158MgC ha1, Vertosols 112MgC ha1, and Dermosols 107MgC ha1. Texture-contrast soils with sandier textured topsoils under pasture had a mean of 69MgC ha1. The range of values in soil carbon stocks indicates considerable uncertainty in baseline values for use in soil carbon accounting. Farmers can influence SOC more by their choice of land use than their day-to-day soil management. Although the influence of management is not as great as other inherent site variables, farmers can still select practices for their ability to retain more SOC.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Soil Sciences
Research Field:Carbon Sequestration Science
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate Change Mitigation Strategies
Author:Cotching, WE (Dr Bill Cotching)
Author:Oliver, G (Mr Garth Oliver)
Author:Downie, M (Mr Mark Downie)
Author:Corkrey, R (Dr Ross Corkrey)
Author:Doyle, RB (Dr Richard Doyle)
ID Code:78708
Year Published:2013
Web of Science® Times Cited:7
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2012-07-22
Last Modified:2017-10-31
Downloads:0

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