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OBSERVATIONS ON THE PEDOLOGY AND FERTILITY OF SOME KRASNOZEMS IN NORTHERN NEW SOUTH WALES
Author(s) -
COLWELL J. D.
Publication year - 1958
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1958.tb01896.x
Subject(s) - organic matter , soil water , total organic carbon , pedology , cation exchange capacity , environmental chemistry , nitrogen , soil organic matter , manganese , phosphorus , carbon fibers , chemistry , potassium , soil fertility , environmental science , soil science , materials science , organic chemistry , composite number , composite material
Summary Eight krasnozem (red‐earth) profiles representing a wide range of environments have been studied. Contrasting features of the soils can be explained by differences in parent material, climate, vegetation, and land use. The main effects corresponding to these variations are seen in the relative contents of total and readily soluble aluminium, organic carbon, nitrogen, organic phosphorus, and of exchangeable metal cations. Land utilization appears to have led to losses in organic carbon, nitrogen, organic phosphorus, exchangeable cations, and ‘available’ manganese. These losses suggest the possibility of a potassium deficiency and are in agreement with observed nitrogen deficiencies. The cation‐exchange capacity of the organic matter is much greater than that of the inorganic matter, and in some soils extrapolation suggests that losses of organic matter threaten the capacity of the soils to retain cations.