Burn or Defficiency

I have a question, what are the main differneces between a burn and a defficiency? as the bottom leaves on my plants go yellow and then get a brown crisp, then eventually wither and fall off. been giving nutes once every 2 days. low levels of 8.0-2.0-6.0 1ml per litter. need some advise fast as problem is getting worse. many thanks

I think you are feeding to much. I feed only once a week if that. Leafs are suppose to yellow and fall off at some point but that don't seem right.

i got some pics up here

http://boards.cannabis.com/showthread.php?t=74474