The corrosive effect of liquid mixed fertilizers on mild steel, stainless steel, and aluminum alloys was determined. Both mild steel and stainless steel were satisfactorily resistant with practically all combinations of variables tested. Aluminum resistivity ranged from unsatisfactory to satisfactory; conditions which had a significantly adverse effect were high phosphate content, high temperature, and aeration of sample. Beneficial conditions were presence of potash and use of inhibitor. There were some differences in resistivity of the aluminum alloys, but the effects of solution variables were much more important.
flat. Five sprigs of Coastal Bermudagrass were planted per flat on July 31, 1961, and the grass was allowed to spread for two months, during which time it was clipped four times and the clippings discarded. On October 4, the following materials and rates of nitrogen were applied uniformly on the soil surface (mg. of N per flat): ammonium nitrate--200, 400, 800, and 1600; urea-•260 and 1050; urea pyrolyzate, cyanuric acid, ammelide and ammeline-200 and 800; urea formaldehyde and melamine-800. Four clippings were made as follows: October 25, November 22, January 23, and April 9.
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