Greenhouse and laboratory experiments with nitrogen-bearing aluminum dross as a fertilizer
1945
Rader, L.F. Jr | Reynolds, D.S. | Jacob, K.D.
Dross from the melting and refining of aluminum and aluminum alloys contains nitrogen in the form of nitrides. The nitrogen content of 21 samples of the material from plants throughout the United States ranged from 0.43 to 10.35% and averaged 5.05%. In greenhouse pot experiments with millet and tomatoes on Sassafras fine sandy loam and Sassafras sandy loam, respectively, the dross was only 1 to 33% as effective in increasing the dry-weight yields as was the same quantity of nitrogen in the form of ammonium sulfate. There were indications that some samples of dross contain substances which may have a small depressive effect on plant growth. The effect of dross on plant growth was directly related, in general, to the rate and extent of conservation of the nitrogen to ammonia in aqueous medium and to its nitrification in a Chester silty clay loam.
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