Do Pine Needles Make Soil More Acidic? Truth or Gardening Myth?

Описание: Pine needles make a great mulch, but do they make soil acidic, or is this a gardening myth? I ask Stephen Legaree to share his thoughts on the topic. Also, please see the links to sources on this topic below:

Links provided by MrChipGardener:

Forest Industry Council - http://www.forestindustrycouncil.com....

Washington State University - http://spokane-county.wsu.edu/spokane...

Links to additional sources:

Colorado State University Extension http://csuturf.colostate.edu/Powerpoi...

GardenMyths.com
http://www.gardenmyths.com/pine-needl...

"Decoding Gardening Advice", p. 49
http://www.amazon.com/Decoding-Garden...

Stephen also used these references:

Wood Chip Mulch: Landscape Boon or Bane?
http://puyallup.wsu.edu/~linda%20chal...
Woodchips.pdf

BorealForest.org
http://www.borealforest.org/index.php...

Acid Rain Effects - Soils http://www.elmhurst.edu/~chm/vchemboo...

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