Are they mowed off? How would this be cleaned off with artificial turf? What paint is used on natural turf and on artificial turf?

What Tunit studs should I use on Artificial turf for my new soccer shoes? I Bought F50+ tunit soccer shoes, what studs should I use for artificial turf because that is the turf i play on. http://www.newitts.com/images/products/2... or http://www.newitts.com/images/products/2... Which ones tell me?

I've been watching NFL Football for a long time now and i have always been curious to know why most stadiums, if the game is played on artificial turf instead of natural turf, choose to put a natural shade of green on the artifical turf? I heard it somewhere that it was due to some of the complaints from some NFL players that it injures them real bad when they play on that color grass, which looks like carpet. Is that true?

I have noticed the artificial turf on a sports ground being watered with big jet hoses prior to use. Why is this?