Dont piss in your plants, there is no way of you telling how much N is in your piss without doing test and if you can afford to test the chemical balances in your piss then you can afford to just go out and buy some nice nutes for you plants, plus why would anyone want to piss on something they love. Not to mention if you do other drugs or eat different things this all will effect how your piss is, so even in that sense you will never have a completely same dose of piss every time you piss. I know going from drinking one night and not drinking the next my piss will go from like coffee color to clear color and i will promise you anyone will not want my 18 pack 4am next morning thick dehydrated coffee piss for their plants.