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THE RED EARTHS AND THE COLLOIDS OF THE RED EARTHS
Author(s) -
LISANTI LUIGI ENRICO
Publication year - 1960
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.1365-2389.1960.tb02204.x
Subject(s) - soil water , colloid , organic matter , environmental chemistry , peninsula , mineralogy , chemical composition , range (aeronautics) , environmental science , chemistry , geology , soil science , geography , archaeology , materials science , organic chemistry , composite material
Summary The chemical composition of the soils and of the colloidal separates of twelve red earths from three widely differing locations in Italy has been determined. The red earths of southern Italy are characterized by low organic matter, little if any CaCO 3 , and appreciable quantities of soluble salts. Those of northern Italy have opposite characteristics. The SiO 2 /R 2 O 3 ratios of the colloids range from 1.60 to 2.09 and bear no relationship to location or climatic factors. It is concluded that similar pedogenetic processes have occurred throughout the Italian peninsula and are independent of geographical position or climatic conditions. In particular the SiO 2 /R 2 O 3 ratio of the colloids of the southern soils is not unusually low as has been suggested by other workers.