about several parameters related to the methane model

[xiangyi-wang]

Hi, I am trying to do some simulation about paddy field with methane model recently. I see several parameters that may need calibration in MERES model papers(Using a crop/soil simulation model and GIS techniques to assess methane emissions from rice fields in Asia. II. Model validation and sensitivity analysis), two of which I didn't find the location in the code annotations.(the root death constant (δr), the specific root exudation rate (εr),. Can you help me locate it?