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Zanne-Lab / communityVchemistry

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does initial density include the bark? #1

Closed marissalee closed 7 years ago

marissalee commented 7 years ago

What's the best way to calculate wood density from this data table? -- @oberleb

communityVchemistry/data/covariates_smallStems.csv

wcornwell commented 7 years ago

Link to file: https://github.com/Zanne-Lab/communityVchemistry/blob/master/data/covariates_smallStems.csv

wcornwell commented 7 years ago

I guess the question is how the column "dry mass wood (g)" and the column "dry mass bark (g)" relate to the column "volume (g)"?

oberleb commented 7 years ago

Hi all; I just circulated an email with a response.

marissalee commented 7 years ago

We have initial volume under the bark for small samples (covariates_smallStems.csv $ Volume (g)).

To calculate initial density for those samples, we’d use Volume (g) and wood mass without bark (Dry mass wood (g)). Then we’ve got our initial estimates of wood density without bark…

Be careful because for each harvest we have measurements that include bark, specifically volume (ex. samp1data_201402.csv $ volMass) and $ wetWeight, $ drilledWeight, and $dryMass.