Ammonia-Salt Systems as Nitrogenous Fertilizers1
- M. F. Zimmerman,
- F. W. Smith and
- 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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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