Dear authors
Thanks for submitting a revised version of your paper. As you point out in your cover letter for the revised version, most of the comments by the reviewers were due to a misunderstanding about the scope of the manuscript. The previous title was misleading, and the new title better represents the scope of the paper. However, I think you can still improve the title and the abstract further explicitly mentioning that this contribution addresses only numerical aspects related with the incorporation of reaction transfer code into a land-surface models. One possibility would be 'Numerical challenges in introducing reaction transfer codes in a land surface model: A proof of concept with CLM-PFLOTRAN 1.0'.
Also, you should mention in the abstract that you are actually not running simulations with advection-difussion processes, but rather running the model in a 'batch' mode as a proof of concept. This will help the reader understand the scope of the paper and have clear expectation of what to expect in the manuscript.
Regards,
Carlos