Soil CarbonDoes Soil Carbon Saturate? What the Ceiling Is, Where It Sits, and What Happens If You Keep Adding
"Soils will saturate" is used to end arguments, and it carries four separate claims: that a field has stopped gaining, that it has reached equilibrium, that its mineral capacity is exhausted, or that further gain is uneconomic. Only one is saturation. A working guide to which fraction actually fills up, why the most famous plateau in soil science cannot test saturation at all, why published capacity equations disagree by close to a factor of two on the same soil, and where the carbon goes when you keep adding anyway. Four interactive tools.
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