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Titolo:
Coastal land scalding in NSW, Australia: Soil chemical characteristics andtheir implications for remediation of the scalded lands
Autore:
Lin, C; Rosicky, M; Mcconchie, D; Sullivan, LA; Lancaster, G;
Indirizzi:
So Cross Univ, Sch Resource Sci & Management, Lismore, NSW, Australia So Cross Univ Lismore NSW Australia Management, Lismore, NSW, Australia
Titolo Testata:
LAND DEGRADATION & DEVELOPMENT
fascicolo: 4, volume: 12, anno: 2001,
pagine: 293 - 303
SICI:
1085-3278(200107/08)12:4<293:CLSINA>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
ESTUARINE FLOODPLAIN;
Keywords:
land scalding; acid sulphate soil; land degradation; acidity; rehabilitation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Lin, C So Cross Univ, Sch Resource Sci & Management, Lismore, NSW, Australia So Cross Univ Lismore NSW Australia ment, Lismore, NSW, Australia
Citazione:
C. Lin et al., "Coastal land scalding in NSW, Australia: Soil chemical characteristics andtheir implications for remediation of the scalded lands", LAND DEGR D, 12(4), 2001, pp. 293-303

Abstract

Scalded lands are common in acid sulphate soil areas on the New South Wales coast, Australia. In this work, chemical characteristics of the scalded acid sulphate soils at nine sites along this coast were investigated. The investigated acid sulphate scalds are characterized by an extremely acidifiedtopsoil layer (0-0.6 m) although they derive from the sediments of varyingsalinity and the metal sulphides contained in the soils have experienced different degrees of oxidation. Almost all of the investigated scalds occur in the areas that have a lower surface elevation than the surrounding areas. These hollows may act as sinks for acid sulphate materials and salts thatare transported from the surrounding areas and the shallower watertables in such locations may enhance upward transport of acid and salt materials from the underlying oxidized sulphidic sediments. In general, the scalded acid sulphate soils have less organic matter and soluble phosphorus, and a greater salinity, soluble acidity, soluble Al, Mn and Zn concentrations, compared to the adjacent non-scalded acid sulphate soils. These are most likely soil constraints for revegetation of the scalded lands and treatment will need to involve acid neutralization (e.g. application of lime) and addition of P fertilizers to reduce the soluble acidity, immobilize soluble Al, Mn and Zn, and increase P availability. The evidence also shows that the highersoluble Al concentration in the scalded soils, relative to the non-scaldedsoils, is related to their lower organic matter content. Hence, rehabilitation of these scalded lands should involve the addition of organic matter to reduce soluble Al concentrations; it may also help reduce Mn and Zn toxicity, and salinity. Copyright (C) 2001 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 23:35:07