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femiguez / apsimx

R package for APSIM-X
https://femiguez.github.io/apsimx-docs/
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Improve documentation for 'apsimx_soil_profile' #177

Open femiguez opened 1 month ago

femiguez commented 1 month ago

Some things that I can add

The values for FBiom, FInert and FOM are actually site specific and in the apsimx R package they are defaults in the function 'apsimx_soil_profile'. The default values are adapted from ( https://doi.org/10.2134/agronj2013.0421).

FOM is the Fresh Organic Matter. Think of this as the root biomass, so they are not soil properties per se, but a result of the crops grown in the field.

However, these are initial values. For your simulations, what I suggest is to run APSIM for at least 10 years so that these values stabilize (but I would check that they actually do - run it for longer if they don't). The need to run 'warm-up' simulation is also true for water dynamics.

LenLon commented 1 month ago

Should the spin-up sims include the crop to be simulated in the "real" run or be fallow?

femiguez commented 3 days ago

@LenLon Sorry I missed this, but the spin-up should match the cropping history of a given site if performing specific simulations. Otherwise, you could include 'typical' crops, but this affects the water, C, N in soil so you want it to match similar to 'real' conditions