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Soils in dry desert environments often are relatively fertile because:

Mollisol soils with a good A-horizon(topsoil) and relatively high fertility can likely be found in:

As water percolates down through the soil profile, it has a tendency, over time, to wash (translocate) clay particles, organic matter, and other materials from the ________ horizon (by eluviation – removal) to the _______ horizon (by illuviation and subsequent accumulation) in a process called podzoliztion.

The general long-term effects of fire on prairie plant communities is:

As soils get older, there is generally more time for their:

Coniferous forest (needleleaf evergreen) (boreal forest) can be found primarily:

Coniferous forest (needleleaf evergreen) (boreal forest) can be found primarily:

The general long-term effects of fire on prairie plant communities is:

The deciduous character of woody plants is most important in climatic environments that have:

The mixed tropical forests is different from a true tropical rainforest because, being a little farther from the equator, it includes deciduous trees which shed their leaves because of a short but pronounced: