Let me ask you where those minerals came from in the first place? Are you or your nieghbors spending less on inputs that ten or twenty years ago? If your program is working, then the use of inputs should go down, shouldn't it?
Brent. You have certainly stimulated a good, educational, discussion. Hope you don`t mind that our points of view differ a bit.
Those Minerals, either came about from the decomposition of parent rock, were transported there by water...as in floodplain/delta soil, were deposited by volcanic ash, windblown loess or ground up and made available by glacial activity.
Our ancestors learned that if they farmed soil for too long without returning manure minerals to the soil, that sooner or later (depending on its natural fertility status) it lost fertility.
The Egyptions relied on yearly flooding of the Nile, to lay down fresh nutrients (carried from Volcanic upland areas) onto their land, so that they could continue farming it.
Volcanic ash, from eruptions, occasionally renewed others land.
and the last Ice age renewed much of , Europe and North Americas` soil.
What about the significant areas of the world, that have soils that have decomposed from parent rock lacking in minerals e.g. granite, or sand and are relatively infertile, OR the many areas of the world that have soils in a climate too dry for micro-organisms to function effectively enough to be of much use ...how would YOU make these soils productive, without adding nutrients in some form?
I`m guessing that if you are going to remove nutrients from the soil on your farm, but not replace them by adding nutrients in some form, that you intend to decompose parent rock (which is a relatively slow process), by microbial activity/plant root exudates at a rate that keeps up with the rate at which you remove nutrients.... Be good if it worked.
If you are on a really good, deep, fertile, virgin soil, in a moist climate, which you probably are, you will be o.k. for quite some years. In that rotation, of course, you will need your legumes to fix N, brassicas for disease break and grasses for soil structural integrity.
However, you will still be mining your soil, and one day it will be "exhausted".