How much nutrients needed per plant

[mindoverflow]

Hi,

I would like to know approximately how much nutrients are consumed per plant per day. Or should I say a 1 liter of nutrients diluted in enough water feeding a 100 plants, how many days would it hold before requiring extra nutrients?

I would appreciate to get any example plants (lettuce, tomato ..) on any hydroponic system. I'm planing to start a hydroponic greenhouse, but I can't get the nutrients from here then I should bring it from abroad (have to pay border taxes) then I will have to buy enough at once, I would also like to get an idea about the total cost.

Thanks.