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Persistent improvements in the structure and hydraulic conductivity of a Ferrosol due to liming


Kirkham, JM and Rowe, BA and Doyle, RB, Persistent improvements in the structure and hydraulic conductivity of a Ferrosol due to liming, Australian Journal of Soil Research, 45, (3) pp. 218-233. ISSN 0004-9573 (2007) [Refereed Article]

DOI: doi:10.1071/SR06169


Changes in the soil structure and hydraulic conductivity of an Acidic Red Ferrosol were measured in a long-term (1968-2003) fertiliser experiment on pasture in north-western Tasmania, Australia. Studies were initiated following observations of both softer soil surface and cracking on plots that had received 15 t/ha of ground agricultural limestone. Liming decreased penetration resistance and increased hydraulic conductivity. These structural improvements were associated with increased mean dry aggregate size, a small increase in wet aggregate stability, higher exchangeable calcium levels, and increased plant growth, but a 9% decrease in total soil organic carbon in the surface 50 mm. This decrease in organic carbon was not associated with deterioration in soil structure, as may have been anticipated. This was probably because total organic C was still 82 g/kg on unlimed plots. Decreases in soil penetration resistance due to liming increased the likelihood of pugging from livestock but may improve ease of tillage. This research demonstrates that liming can improve the structure of a well-aggregated Ferrosol as well as its previously reported effects of increasing soil pH and yields of pasture and barley despite decreasing organic C. © CSIRO 2007.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Soil sciences
Research Field:Soil physics
Objective Division:Animal Production and Animal Primary Products
Objective Group:Pasture, browse and fodder crops
Objective Field:Sown pastures (excl. lucerne)
UTAS Author:Kirkham, JM (Mr James Kirkham)
UTAS Author:Rowe, BA (Mr Barry Rowe)
UTAS Author:Doyle, RB (Associate Professor Richard Doyle)
ID Code:40770
Year Published:2007
Web of Science® Times Cited:12
Deposited By:Agricultural Science
Deposited On:2007-08-01
Last Modified:2011-09-26

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