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Journal article
Soil characteristics and fertility of the unique Jarrah Forest of Southwestern Australia, with particular consideration of plant nutrition and land rehabilitation
Land (Basel), Vol.12(6), 1236
2023
Abstract
The jarrah forest is a natural ecosystem with significant endemism in the flora and fauna. The forest stands on the western edge of the ancient Great Plateau of Western Australia on the granitic shield of the Yilgarn craton (2.5 Gya). The long-term migration of soluble iron and aluminium led to the formation of bauxite ore. The regolith ore is bound by surficial topsoil and deep pallid zone kaolinite clays, primarily used in land rehabilitation. We investigated the chemical fertility of the substrates, along with key physical properties. We found the capacity of these soils to provide a stable growth medium differed considerably in their ability to retain and supply nutrients. These substrates are deficient in nitrogen, phosphorus, and micronutrients. In the topsoil, 15% of total P is plant-available, while in the pallid zone layer, only 1% of total P is available. 31P-NMR showed no organic P in the pallid zone, whereas the topsoil had significant organic P and, consequently, a supply of phosphate ions. This shows the importance of organic P in the topsoil for ecosystem nutrition when inorganic fertilisers are not applied in state-of-the-art restoration schemes.
Details
- Title
- Soil characteristics and fertility of the unique Jarrah Forest of Southwestern Australia, with particular consideration of plant nutrition and land rehabilitation
- Authors/Creators
- Amin Soltangheisi - University of ReadingSuman GeorgeMark Tibbett - University of Reading
- Publication Details
- Land (Basel), Vol.12(6), 1236
- Publisher
- MDPI
- Identifiers
- 991005591967907891
- Copyright
- © 2023 by the authors.
- Murdoch Affiliation
- Food Futures Institute
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.473 Soil Phosphorus Dynamics
- Web Of Science research areas
- Environmental Studies
- ESI research areas
- Social Sciences, general