A weathering score for sandy soil materials based on the intensity of etching of quartz grains
作者:
V. MARCELINO,
G. STOOPS,
期刊:
European Journal of Soil Science
(WILEY Available online 1996)
卷期:
Volume 47,
issue 1
页码: 7-12
ISSN:1351-0754
年代: 1996
DOI:10.1111/j.1365-2389.1996.tb01366.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
SummaryA semi‐quantitative method is developed to assess the relative weathering of tropical sandy soils. Individual quartz sand grains are classified on the frequency and the size of dissolution etch pits in their surfaces, using scanning electron microscopy (SEM). A scale with five grain‐type classes reflecting increasing intensity of etching is defined, and the relative frequency of each of these classes in horizons of selected soil profiles is determined. To summarize the information contained in the frequency distribution a weighted score, the weathering score, is calculated. This score assesses the relative weathering of individual horizons, and it makes it easy to compare them with other horizons within the same or from other profiles. It is useful in detecting weathering trends and differences between horizons of tropical sandy so
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