Quote Originally Posted by Xondoure View Post
Reapers would have kept agriculture intact/improved it. Have to feed the herd after all.
It certainly does fit their MO to stop at a planet bomb the industry and the ability to get more supplies, then build up an agricultural sector that will keep the population fat and happy before they flew off into the wild yonder sure one day that they would return to harvest what they sowed that faithful day after the population fattened up nicely.

No more than likely they put the bodies of the dead into a blender and fed the resulting slurry to their prisoners. Which actually does fit with their MO of brutal disgusting practicality.