Dear John i wish you are right but novacrop measures the water in moles (milimole for macro and micromole for micronutrients).

well the frequency. it’s a long story , because i try it in more way.

i was mixing in to the irrigation water by injection when i irrigated from the well directly than it was a spike in the old leaf, after i started to pump the water from well to a big pool because i wanted to heat up that water and to cultivate some biology in it. so in the water i put in the zintrac+eddha iron in pretty big quantities and nothing happened the zinc and iron in plant did move down slowly maybe sometimes up but always deficient.so after i injected the zintrac+eddha iron in the irrigation water as i irrigated from the pool the new leaves got a lot of iron and zinc.it was maybe because the temperature different of the irrigation water or because of weather i don’t know. but i am keep moving and try out things.