Journal ArticleDOI
Weathering and soil development on a sequence of river terraces
TLDR
In this article, five soil profiles on alluvial terraces in the Macleay River Valley, N.S. have been studied to determine changes in soil development with increasing age.Abstract:
Five soil profiles on alluvial terraces in the Macleay River Valley, N.S.W., have been studied to determine changes in soil development with increasing age. The criteria used were mainly macromorphology, micromorphology (basic fabric, evidence of weathering of lithorelicts and biotite, and depth functions of illuviated clay), depth functions of grain-size distributions, and clay mineralogy. The evidence suggests that the four youngest soil profiles represent successive stages of profile development by weathering for the most part and, to a lesser extent, formation of an horizon of illuviated clay; data for the oldest soil indicate a different history of profile development.read more
Citations
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Book ChapterDOI
The influence of soil structure on water movement, crop root growth, and water uptake
TL;DR: This chapter focuses on the role of the soil structure (the soil–pore system) through which both water and roots move, and evidence that loosening of zones of high strength improves crop–water relations.
Journal ArticleDOI
Mind the gap: an absence of valley-fill deposits identifying the Holocene hypsithermal period of enhanced flow regime in southeastern Australia:
Tim J Cohen,Gerald C. Nanson +1 more
TL;DR: The Holocene sedimentary record in southeastern Australia is present in a range of landscape settings, such as upland swamps (dells), internally drained lake basins, alluvial fans, and mid-catchmen.
Book ChapterDOI
Fine-grained Micas in Soils
TL;DR: In many soils, fine-grained micas are altered to vermiculite and sometimes to smectitelike minerals and, as such, significantly increase the cation exchange capacity and affect the relative selectivity by soils for various exchangeable cations as discussed by the authors.
Journal ArticleDOI
Topographically associated but chronologically disjunct late Quaternary floodplains and terraces in a partly confined valley, south-eastern Australia
Tim J Cohen,Gerald C. Nanson +1 more
TL;DR: The Bellinger River catchment in the New England Fold Belt on the mid-north coast of New South Wales is characterized by an assemblage of stepped late Quaternary alluvial units as discussed by the authors.
Journal ArticleDOI
Stratigraphic principles and practices as related to soil mantles
TL;DR: Soil stratigraphy concerns the chronological ordering of pedological episodes and therefore has important implications in the reconstruction of paleoenvironments and the interpretation of stratigraphic sequences where soils and weathering zones occur.
References
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Book
A Handbook of Australian Soils
H. C. T. Stace,G. D. Hubble,R. Brewer,K. H. Northcote,J. R. Sleeman,M. J. Mulcahy,E. G. Hallsworth +6 more
Journal ArticleDOI
Iron Oxide Removal from Soils and Clays1
N. H. Aguilera,M. L. Jackson +1 more
TL;DR: In this article, a procedure is presented which employs sodium dithionite (Na2S2O4, hyposulfite, or "hydrosulfite") as the reductor, and 0.3 molar citrate with or without Fe-3 specific Versene as the chelating reagent.
Book ChapterDOI
Chemical Weathering of Minerals in Soils
TL;DR: In this article, the authors examined the processes and products of chemical weathering of minerals in soils from the standpoint of each of these phases and highlighted the relative stability of minerals; weathering sequences and indexes.