Kick starting the World.

[bigpaul]

fields do not recover naturally, they will be overgrown very quickly, all land needs to be managed or it will revert to nature, with 99% of the population dead there will be no land management.
for seeds, you will need a stock of heirloom or heritage seeds, non F1 or Hybrid, without seeds you wont be growing anything.
as for opening the power breakers you've been watching too many episodes of "survivors".