Success in Brazil with Citrus and Ornamentals

In 1992, as a young citrus consultant and agronomist, I observed in an orchard that was doing very poorly in Dourado (SP), Brazil that on a particular parcel the orange trees developed more quickly and had more fruit than the other trees on the property. In the area where the citrus trees were thriving, the ground was very flat with splintery "rusted" rocks that had a dark, almost black color. On researching further I did mineral analyses and began to do practical experiments in the field. I began to research various rock deposits in the region and studied variations in their mineral constituents. (more…)