The forest soils of the Quetico-Superior are relatively infertile, with the majority of nutrients tied up in the biomass of living and un-decomposed plants.
(The forest soils of the Quetico-Superior; are; relatively infertile) (nutrients; tied up; L:in the biomass of living and un-decomposed plants)
The forest soils of the Quetico-Superior nutrients
are tied up
relatively infertile
L:in the biomass of living and un-decomposed plants