fifteen-atmosphere percentage

What is fifteen-atmosphere percentage?

fifteen-atmosphere percentage meaning in Soil Science terminology / glossary / dictionary is:
(no longer used in SSSA publications) The percentage of water contained in a soil that has been saturated, subjected to, and is in equilibrium with, an applied pressure of 15 atm. Approximately the same as fifteen-bar percentage. See also soil water.


reference: Soil Science Society of America