2 questions: Germination and Supercropping

Lets try and get you some answers...
question 1: I personally have never heard this and I wouldn't try it with my expensive-ass TGA or Gage Green seeds... As far as I know, which I've read and heard, seedlings/sprouts get everything they need from water at that stage in their life... minerals included. I do not even think about feeding my seedlings until I see the second, sometimes third, set of "true" leaves (the serrated leaves we all know).
question 2: Sounds more like you are talking about tying down the plant or doing some LST, as its known by. Supercropping is where you actually snap the internal cell structure of the branch or main stem and bend it at a 90 degree angle. You need to be careful when doing this. I prefer to LST over supercropping, if for no other reason because I'm not comfortable when I hear the "snap" of the internal cell structure breaking and it makes me nervous that I'll just break off the top of my plant.

I can't imagine how 1 would be a good idea. I've planted directly in Happy Frog without pre-germinating, and the seedlings have still emerged with nute burn. Note the first true leaves on the picture below. I can only imagine that if that's what the taproot is first exposed to, it's not going to like it. I'm not even going to guess at 2, as I'm too new, but PersonalJesus seems to know what he's talking about, so I'd listen.


Cheers!

Low stress training by just tying down branches can be just as effective as super cropping and looks a hell of a lot better than a bunch of awkwardly bent branches. If you are inclined spending more time with your plants, tuck away fan leaves to expose as many new growth sites as possible after LSTing. There is no need to snap or cut anything, only move and tuck, move and tuck. here's a pic of some lst from my garden last year:

Snap that stem. Support it if necessary for 24 hours. After that it will not be necessary as a super strong callous will form. Your plant will not miss a beat. If you want to tie stuff up there are other forums. Search "B&D". Not saying twine doesn't work as it does obviously. It's just more time spent cracking rat turds open.