Several Soviet T-26 knocked-out, summer 1941.

Tank graveyard

I've found a series of photos taken in Russia during WW2.They have no captions and no known authors.Some of them may be of the journalists Vladimir Lupejko and Dmitri Baltermants.So I need some help from all of you in here to maybe place a name,date or whereabouts on the photos.
Thx,brummbar
This is my interpretation of this photo:
Political commisars checking on the quality of the grain harvest.What could be the meaning of the sign'Brandenburg'?