Hi Homero,

Could you change your fix for calc_root_fraction.c as follows:
1. restore line 99 to its previous form (using Zstep)
2. add the following line after zone is incremented on lines 84 and 88:
Zstep = (double)veg_con[veg].zone_depth[zone];

Once this is done, we will happily merge this into the code.
Thanks,
Ted