In 1987, seed samples from three cotton fields in Avra Valley, Arizona, grown with liquid sewage sludge and inorganic nitrogen fertilizer, were analyzed for five heavy metals. Concentrations of cadmium, copper, lead, nickel, and zinc were similar in cotton seeds fertilized with either sewage sludge or inorganic nitrogen fertilizer. The levels of all five metals were well below the allowable EPA limits.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/204508 |
| Date | 03 1900 |
| Creators | Day, A. D., Taylor, B. B., Pepper, I. L., Minnich, M. M. |
| Publisher | College of Agriculture, University of Arizona (Tucson, AZ) |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Article |
| Relation | 370072, Series P-72 |
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