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Supertopics:
Soil Degradation (Peak Soil)

Topsoil Erosion / Depletion

Subtopics:
Plant Nutrient Defficiencies
Phosphorus Depletion (Peak Phosphorus)
organic versus petrochemical fertilizer
webGrowAnything.com2015-12-04
Trees Preventing Erosion
deforestation releases mercury via erosion
webJayme Poisson and David BruserThe Star2016-09-14
trees reviving farmland in Niger
webLydia PolgreenNew York Times2007-02-11
planting legumes to counter soil erosion
webAlex WhitingReuters
a third of arable land has been lost in 40 years
webOliver MilmanThe Guardian2015-12-02
an overview of soil erosion
webChris RhodesEnergy Balance Blog2014-05-30
preserving the soil in your garden
webThe Guardian2014-04-04
no-till cover-crop famer David Brandt
webTom PhilpottMother Jones2013-09-09
the roots of soil health (conservation agriculture) (pdf)
webFrancis Shaxson, Amir KassamUN Food and Agriculture Organi...2008-07-01
vertical hillside planting can reduce erosion
webDeborah K. RichSan Francisco Chronicle2006-05-13