1. A METHOD OF MANUFACTURING AMMONIUM NITROHUMATE WHICH COMPRISES REACTING AT A TEMPERATURE WITHIN THE RANGE OF ABOUT -33.6*C. TO 100*C. NITROHUMIC ACID IN POWDERED STATE WITH DILUTE AMMONIA GAS IN A FLUIDIZED BED, SAID DILUTE AMMONIA GAS CONTAINING AMMONIA IN AN AMOUNT LESS THAN 70% BY WEIGHT, SAID DILUTE AMMONIA GAS BEING PREPARED BY DILUTING THE AMMONIA WITH A DILUENT GAS SELECTED FROM THE GROUP CONSISTING OF AIR, NITROGEN, NATURAL GAS AND COMBUSTION WASTE GASES FROM WHICH CARBON DIOXIDE GAS HAS BEEN REMOVED.