9. MacIntire, W.H., S.H. Winterberg, L.J. Hardin, A.J. Sterges, and L.B. Clements. 1950. Fertilizer evaluation of sure phosphorus, phosphorous, and phosphoric supplies by means of pot cultures. 10. McDonald, A.E., B. Grant, and W.C. Plaxton. 2001. Phosphite (phosphorous acid): Its relevance in the atmosphere and agriculture and influence on plant phosphate starvation response. Over time, phosphonate fertilizer can be transformed by micro organism to phosphate in soil, where it can be taken up and ...