@article{knoepp_long-term_1997,
	title = {Long-term effects of commercial sawlog harvest on soil cation concentrations.},
	volume = {93},
	url = {http://cwt33.ecology.uga.edu/publications/230.pdf},
	abstract = {There is increasing concern about the effects of nutrient removal associated with various forest harvesting practices on long-term site productivity.  We measured exchangeable soil cation concentration responses to a commercial clearcut sawlog harvest in mixed hardwoods on a 59-ha watershed in the southern Appalachians.  Soils were sampled 17 months prior to, and periodically for 17 years after, harvest.  Concentrations of Ca, Mg, and K, increased significantly in the 0-10 cm soil layer for 3 years following harvest compared to pre- treatment levels.  Concentrations of Mg and K were still significantly above pre-treatment levels 17-20 years following harvest.  Calcium concentrations did not change significantly at the 10-30 cm depth, but both Mg and K showed significantly higher concentrations in some post- treatment years.  Soils in the adjacent reference watershed showed no significant changes in soil cation concentrations over the same 17-year period.  Results indicate that sawlog harvest using cable- yarding techniques on these sites does not adversely impact soil cation concentrations.},
	journal = {Forest Ecology and Management},
	author = {Knoepp, Jennifer D. and Swank, W.T.},
	year = {1997},
	keywords = {CWT}
}

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