Kranabetter [ 60 ] showed a slight trend of an increase in mineral soil C (until 50 cm depth) along a productivity gradient in Canadian boreal forests.
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Soil and Site Productivity Effects on Above- and Belowground Radiata Pine Carbon Pools at Harvesting Age.
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Since not all the studies found a significant trend between C stock in the mineral soil and site productivity, this study provides a significant linear model ( p < 0.05; r 2 = 0.88) and suggests that productivity could be used to estimate site and soil C stocks.