Gypsum
Issue Date
1916Keywords
Arizona Geological Survey BulletinsRecent
Arizona
United States of America
minning
commercial interests
anhydrite
massive gypsum
satin spar gypsum
selenite gypsumcrystallized gypsumplastermineralsgypsum
Metadata
Show full item recordPublisher
University of Arizona Bureau of MinesDescription
The gypsum industry is a growing one, and will apparently continue to grow for some time. Producers report better trade conditions for 1913 than for 1912. In ten years the production has jumped from 1,000,000 tons of crude gypsum in 1903 to more than 2,500,000 tons in 1913. Gypsum was produced in eighteen states and in Alaska. Eighty-two quarries or mines were worked, while the total number of mills reported in 1913 was 67. New York was the largest producer of raw gypsum; Iowa ranked second and Michigan third. 8 p.Additional Links
http://repository.azgs.az.gov/uri_gin/azgs/dlio/1143Language
enSeries/Report no.
Bulletin No. 19Mineral Technology Series No. 10
Rights
Public Domain: This material has been identified as being free of known restrictions under U.S. copyright law, including all related and neighboring rights.Collection Information
Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.North Bounding Coordinate
48.9967South Bounding Coordinate
24.7897West Bounding Coordinate
-124.629East Bounding Coordinate
-67.6758Collections
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Effects of soil amendments on crusting, seedling emergence and yield of onion, tomatoes and peppers.The effects of sulfur-containing amendments (H₂SO₄,Al₂(SO₄)₃ and gypsum) or crust formation, soil chemical properties, seedling emergence and yields of onions (Allium cepa), tomatoes (Lycopersicum esculentum) and chili peppers (Capsicum sp.) were studied on a Pima clay loam soil. Treatments were surface applied on a strip above the seeds. The chemicals influenced the penetrometer index, soil-pH, electrical conductivity, DPTA-extractable soil Fe, Cu, Zn, Mu and seedling emergence in two greenhouse experiments. Gypsum and H₂SO₄ increased seedling emergence while Al₂(SO₄)₃ reduced the soil-pH and EC more than H₂SO₄ and gypsum. Based upon penetrometer readings, H₂SO₄ was the best anti-crusting agent tested followed by gypsum and Al₂(SO₄)₃. At the end of the study, all soil samples were very low in KCl extractable Al, showing that Al toxicity was not responsible for seedling damage. Gypsum decreased levels of Mn and Zn but did not affect Fe and Cu. Al₂(SO₄)₃ increased Fe and Zn, decreased Cu but did not affect Mn. H₂SO₄ did not affect extractable Mn, Cu, Zn and Fe levels. In a field study using two water qualities at Safford, gypsum produced the most tomato seedlings whereas Al₂(SO₄)₃ and H₂SO₄ produced the least. Onion stand counts were not affected by the chemicals with either water. Gypsum, H₂SO₄ and Al₂(SO₄)₃ polymer produced the highest pepper stand counts with the saltier water but there were no differences with lower salt water. Tomatoes produced the highest yield with gypsum and lowest with H₂SO₄ and Al₂(SO₄)₃ with saltier water. With lower salt water, gypsum produced highest yield, followed by the H₂SO₄. Both H₂SO₄ treatments produce low yields. Onions showed no treatment response under lower salt water, while with saltier water, gypsum and H₂SO₄ produced the highest yields. Pepper yields were not affected by amendments with the lower salt water. Al₂(SO₄)₃ polymer, H₂SO₄ and gypsum increased yields with the saltier water. Varieties of peppers and tomatoes produced different yields in response to water quality in a supplementary field study.
