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International-Soil-Radiocarbon-Database / ISRaD

Repository for the development and release of ISRaD data and tools
https://international-soil-radiocarbon-database.github.io/ISRaD/
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Roots and litter incubations #249

Closed agathadrk closed 3 years ago

agathadrk commented 3 years ago

Hi All,

I have a doubt about entering roots and litter incubations. For roots, would the path be: Layer (for more details on lyr_top and lyr_bot) -> Fraction (frc_property: roots) -> Incubation (referring back to the corresponding layer and fraction)?

For litter I suppose it would be similar, but there is no "frc_property" referring to it. Should the path be: Layer -> Fraction -> Incubation or only Layer -> Incubation?

jb388 commented 3 years ago

Hi Ágatha, Your intuition about roots is correct: Layer (for more details on lyr_top and lyr_bot) -> Fraction (frc_property: roots) -> Incubation (referring back to the corresponding layer and fraction).

We have treated litter conceptually as its own layer, not a fraction. So you would enter the litter lyr_top, lyr_bot in the layer table (using negative values for lyr_top/lyr_bot), and then reference the layer record in the incubation table, i.e. Layer -> Incubation.

Hope that helps clarify.

agathadrk commented 3 years ago

Great! Thanks a lot Jeff.

This clarifies all my questions. I used for litter depth -5(lyr_top) and 0(lyr_bot).