Why do the leaves of my smoke trees/shrubs have brown edges in places and why...
Are the chlorotic (yellowing) leaves mostly the newer leaves? Those on the ends of the branches? How long has this been happening? Did the damage progress slowly or happen all at once?
The interveinal chlorosis that is pictured looks to be the result of an iron or manganese deficiency. This will, however, be somewhat uniform across all of the new growth of the plant. If not, look at the shoot below the chlorotic leaves for some damage. There may be damage to the shoot which is limiting the uptake and translocation of water the accompanying nutrients.