he ony thig about contradictions is we are working with living nature. and all living nature is different. no 2 thing alike period. you cant have 2 exactly same plants from seed only similar plants. so since no 2 plants are alike(unless cloning) they all take different amounts of everything.
get used to growing the same strain and youll perfect it. if i say i can feed my widow with x amount of nutes and you try that with your widow you might burn it cause she cant take much nutes.
get it.