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This article in SSSAJ

  1. Vol. 22 No. 5, p. 414-418
    Received: Jan 11, 1958



Ammonia-Salt Systems as Nitrogenous Fertilizers1

  1. M. F. Zimmerman,
  2. F. W. Smith and
  3. G. W. Leonard2



“Divers' solution” (an NH4NO3-NH3 system); similar systems of NaI-NH3, NH4I-NH3, NaSCN-NH3, NH4SCN-NH3, NH4Br-NH3; and three solid nitrogenous fertilizers (NH4NO3, CO(NH2)2, and urea-form) were compared in the greenhouse as sources of nitrogen for wheat and millet plants.

The systems of NaSCN-NH3, NH4SCN-NH3, NH4I-NH3, and NaI-NH3 were very toxic for the first crop of plants. Lethal effects of NaSCN-NH3 and NH4SCN-NH3 disappeared in about 5 months. Both systems, NH4I-NH3 and NaI-NH3, were toxic for a longer period. Applications of NH4Br-NH3 caused considerable wilting at first but no lethal effects occurred.

The greatest nitrogen percentage in wheat plants occurred from use of NH4Br-NH3 but the greatest total accumulation in plants resulted from use of NH4NO3-NH3. Urea-form was ineffective as a source of nitrogen for the first crop. Solid ammonium nitrate and urea were of about the same effectiveness.

Herbicidal possibilities for some of the systems were suggested.

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