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Root Air Space Measurements by a Pycnometer Method 1
Author(s) -
Jensen C. R.,
Luxmoore R. J.,
VanGundy S. D.,
Stolzy L. H.
Publication year - 1969
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1969.00021962006100030045x
Subject(s) - porosity , bottle , gas pycnometer , aeration , fraction (chemistry) , ball (mathematics) , materials science , mathematics , chemistry , composite material , chromatography , geometry , organic chemistry
The air space fraction, or porosity, of plant roots is important to their internal aeration. Root porosity can be calculated from the following measurements: the weight of a sample of the roots in a pycnometer bottle filled with water; the weight of the root sample alone; the weight of the homogenate after ball milling the sample; and the weight of the bottle filled with water only. Results are variable and a mean of 10 samples must be obtained.