What is Fibrists?

Fibrists meaning in Soil Science terminology / glossary / dictionary is:
Histosols that have a high content of undecomposed plant fibers and a bulk density less than about 0.1 g cm-3. Fibrists are saturated with water for periods long enough to limit their use for most crops unless they are artificially drained. (A suborder in the U.S. system of soil taxonomy.)


reference: Soil Science Society of America