Glossary – A

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Acre – An area of land that contains 43,560 square feet.

Advance regeneration (reproduction) – Seedling-size trees present in a stand before a harvest aimed at regenerating the stand.

Age class – A year or defined period of years within the life of a tree stand.

All-aged stand – A stand that contains trees of all, or almost all, age classes. Also called “uneven-aged” stand. Contrast with an “even-aged” stand.

Alluvial soil – Soil deposited when flowing water slows down and suspended sediment drops to the bottom.

Artificial regeneration (reproduction) – See regeneration.

Aspect – The compass direction toward which a slope faces.

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