I am testing plants and am assuming the below are botanical expressions. Ph level was NV % of Ca0, N, P2, 05, K20, Mgo N = Nitrogen Mgo and the others I am not sure of nor NV
Horticulture training touches briefly on the science, so I'm sorry but I can't answer your questions. I was never interested in anything more than to grow the plants so they are healthy - I didn't need to know why.
Mgo is Magnesium Oxide, which I found by doing a web search on that exact thing, NV not so much. There are lots of things using that abbreviation, like Nevada, or an artificial neuron.
So the science end of things is not my forte. Sorry I couldn't help you!