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If you are not in the position of following the steps suggested in Ash's answer, I'd suggest you to rely on existing data, as the ISRIC dataset "WISE derived soil properties on a 30 by 30 arc-seconds global grid", developed at Wageningen university and available here. This dataset is originally based on the FAO-Unesco Soil Map of the World (DSMW). ...


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All weight percentages are calculated using the same formula: Mass Fraction/Total Sample Mass There are two different values for organic material in a soil and they're derived by different techniques: If you want to know how much bioavailable organic material is in the soil I was taught to use a chemical reagent to oxidise and strip organic carbon from the ...


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