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Shrinkage Curve Indices to Quantify Cultivation Effects on Soil Structure of a Vertisol
Author(s) -
McGarry D.,
Daniells I. G.
Publication year - 1987
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1987.03615995005100060031x
Subject(s) - shrinkage , vertisol , water content , soil science , porosity , volume (thermodynamics) , environmental science , soil structure , bulk density , geology , mineralogy , soil water , materials science , geotechnical engineering , composite material , physics , quantum mechanics
Differences in selected parameters and derived variables of models fitted to soil shrinkage curves were used to investigate soil structural degradation of an irrigated Pellustert in northern New South Wales, Australia. Significant differences between clods taken from the same depths in land prepared for cotton ( Gossypium hirsutum L.) when “dry” and “wet” were found in specific clod volume at zero water content, the slope of the line in the normal shrinkage zone, the airfilled specific pore volume throughout normal shrinkage, and the range in water content in the structural shrinkage zone. These indicators showed that this soil prepared wet exhibited increased bulk density, decreased porosity, loss of structural pores, and tended to have weak structural development.