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Soil Degradation Miscellany
Soil Degradation through 2015
Documents:
global warming releases more carbon from soil
web
ScienceDaily
2014-09-03
debating the soil quality of the southern Gill Tract
why healthy soil is important (overview)
web
Renee Cho
Columbia Climate School
2012-04-12
conquest of the land over 7000 years
web
W. C. Lowdermilk
USDA
1953-08-01