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Measurement of soil water tension in single aggregates with use of the filter paper method
Author(s) -
Bohne Heike,
Savage Michael J.
Publication year - 1991
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19911540212
Subject(s) - loam , filter paper , aggregate (composite) , materials science , filter (signal processing) , tube (container) , wax , composite material , conical surface , geotechnical engineering , soil water , environmental science , chemistry , soil science , geology , chromatography , computer science , computer vision
The filter paper method was used to establish the retentivity curves of single aggregates. Aggregates (diameter 3‐4 cm) from an Alfisol (sandy loam) and a Mollisol (sandy clay) were used. The aggregates had different water contents. Whatman No. 42 filter paper, attached to a conical plastic tube on the end of a rod, was inserted into a hole made in the aggregate. The hole was made using a small corer. The aggregates were sealed in wax, put into a plastic bag and stored in a thermo‐constant room to equilibrate. After seven days the water content of the aggregates and of the filter papers were determined at 105°C. Retentivity curves for the aggregates are presented and sources of error are discussed.