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Effects of agricultural management on dermosols in northern Tasmania

Citation

Cotching, WE and Cooper, J and Sparrow, LA and McCorkell, BE and Rowley, W, Effects of agricultural management on dermosols in northern Tasmania, Australian Journal of Soil Research, 40 pp. 65-79. ISSN 0004-9573 (2002) [Refereed Article]

DOI: doi:10.1071/SR01006

Abstract

Attributes of 15 Tasmanian dermosols were assessed using field and laboratory techniques to determine changes associated with 3 typical forms of agricultural management: long-term pasture, cropping with shallow tillage using discs and tines, and cropping (including potatoes) with more rigorous and deeper tillage including deep ripping and powered implements. Soil organic carbon in the surface 75 mm was 7.0% under long-term pasture compared with 4.3% and 4.2% in cropped paddocks. Microbial biomass carbon concentrations were 217 mg/kg, 161 mg/kg, and 139 mg/kg, respectively. These differences were negatively correlated with the number of years cropped. Greater bulk densities were found in the surface layer of cropped paddocks but these were not associated with increased penetration resistance or decreased infiltration rate and are unlikely to impede root growth. Long-term pasture paddocks showed stronger structural development and had smaller clods than cropped paddocks. Vane shear strength and penetration resistance were lower in cropped paddocks than under long-term pasture. Many soil attributes showed no significant differences associated with management. Including potatoes in the rotation did not appear to affect these dermosols, which indicates a degree of robustness in these soils.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Soil Sciences
Research Field:Soil Sciences not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other Plant Production and Plant Primary Products
Objective Field:Plant Production and Plant Primary Products not elsewhere classified
Author:Cotching, WE (Dr Bill Cotching)
Author:Sparrow, LA (Dr Leigh Sparrow)
Author:Rowley, W (Mr William Rowley)
ID Code:24324
Year Published:2002
Web of Science® Times Cited:11
Deposited By:Agricultural Science
Deposited On:2002-08-01
Last Modified:2007-01-16
Downloads:0

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