The effects of leaching and whole-tree harvesting on cation budgets of several forests. Johnson, D Journal of Environmental Quality, 1988. Paper abstract bibtex Coordinated studies of the effects of acid deposition, natural leaching, and whole-tree harvesting (WTH) on base cation export from forests in Maine, Tennessee, South Carolina, North Carolina, and Washington showed that base cation export via WTH would be nearly independent of soil exchangeable base cation supplies and base cation export via leaching would be strongly dependent on the exchangeable cation supplies as well as the input, production, and mobility of anions. Mixed deciduous sites in Tennessee had among the highest base cation (principally Ca) exports via WTH, yet the lowest soil exchangeable supplies, whereas the Washington sites had by far the highest base cation leaching and soil exchangeable supplies, yet only relatively moderate base cation exports via WTH. Sulfate was either the dominant or a major anion in soil solutions from the eastern sites, suggesting that atmospheric deposition was a major factor of these sites, but total leaching rates from these sites were much lower than at the Washington sites. Some of the eastern sites showed a net annual accumulation of one or more base cations from atmospheric deposition. Some of the southeastern sites with Ultisols showed the expected net retention of SO4, but the sites in the Tennessee Valley near Oak Ridge showed surprisingly little ecosystem SO4 retention.
@article{johnson_effects_1988-1,
title = {The effects of leaching and whole-tree harvesting on cation budgets of several forests.},
volume = {17},
url = {http://cwt33.ecology.uga.edu/publications/756.pdf},
abstract = {Coordinated studies of the effects of acid deposition, natural leaching, and whole-tree harvesting (WTH) on base cation export from forests in Maine, Tennessee, South Carolina, North Carolina, and Washington showed that base cation export via WTH would be nearly independent of soil exchangeable base cation supplies and base cation export via leaching would be strongly dependent on the exchangeable cation supplies as well as the input, production, and mobility of anions. Mixed deciduous sites in Tennessee had among the highest base cation (principally Ca) exports via WTH, yet the lowest soil exchangeable supplies, whereas the Washington sites had by far the highest base cation leaching and soil exchangeable supplies, yet only relatively moderate base cation exports via WTH. Sulfate was either the dominant or a major anion in soil solutions from the eastern sites, suggesting that atmospheric deposition was a major factor of these sites, but total leaching rates from these sites were much lower than at the Washington sites. Some of the eastern sites showed a net annual accumulation of one or more base cations from atmospheric deposition. Some of the southeastern sites with Ultisols showed the expected net retention of SO4, but the sites in the Tennessee Valley near Oak Ridge showed surprisingly little ecosystem SO4 retention.},
number = {3},
journal = {Journal of Environmental Quality},
author = {Johnson, D},
year = {1988},
keywords = {HBR, CWT}
}
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