Temperature modification link to TAV

[chporter]

Should temperature sensitivity analysis (environmental modification) for TMAX and TMIN include a change to the TAV used in soil temperature calculations? This would be important for soil organic matter, automatic planting, emergence, plant N and soil N processes. We should at least look at the impact.

[chporter]

After discussion with Jeff White, it seems there are cases where you would not want to change TAV with TMAX and TMIN, for example an experiment with field heaters for climate change study. It might be best to add a separate input in Environmental Modifications for TAV so the user can control it.