The procedure recommended by QUANTEC in the case of fertilisers, insecticides, herbicides and fungicides is to start with 80% of the previous quantity, and then reduce the dosage annually in 10% steps.
Under no circumstances should all such agents be replaced only by QUANTEC in the very first year. Nature is in a very unstable balance on every intensively managed farm, and simply needs time to recover, with the aid of QUANTEC.