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Show 5 Titles and Abstracts found the exact location of the nests; Dr. R. V., the Biology Department of the University of of head Chamberlin, of Buildings and Grounds Utah; and Kent Evans, Superintendent was made possible by the The of Utah. trip the of also University Utah. of authorities of the University we would not have 'Oreohelix howardi, new species David T. Jones University of Utah, Salt Lake City, Utah Lake City, This species, living in Mill Creek Canyon, Salt from (Cockerell) by depresse be can readily distinguished Utah, also have a markings on the nuclear whorls. Fresh specimens color pattern, characterized by the narrowness very characteristic bands set on of the two sharply-marqined, chocolate-brown color The ground color and, to a lesser a deep brown background. to light. The species extent, the color bands fade when exposed head of. the Zoology is named for Dr. Orson Howard, former Department of the University of Utah. Fire As A Tool In Handling Native Vegetation George Stewart U. S. Forest Service, Ogden, Utah Some Relations Between Ferrous and Ferric Iron and High-Lime Chlorosis D. W. Thorne and Arthur WaJlace Utah Agricultural Experiment Station Logan, Utah or Hiqh-lime chlorosis is due to a deficinecy of either factors have been reported and soil of number A plant manganese. Soil factors reported as related as correlated with the disease. moisture content, to chlorosis include pH, lime content, texture, characteristics re Plant characteristics. and profile organic matter, total iron, low ported as associated with chlorosis include low and high calcium content, low high potassium manganese content, The present study indi nitrogen contents and low internal pH. iron in calcareous cates that ferrous iron is the most active form of iron and that a deficiency of it is closely related to soils and in plants chlorosis. Soils deficient in available iron contain less iron that than do soils producing can be readily reduced to the ferrous form tissues contain less soluble ferrous leaf Chlorotic green plants. ferric iron to the ferrous iron and have less capacity to reduce form than do green leaf tissues. As a result of this study it is soils and pointed out that the oxidation-reduction potential of tissues deserves more attention in relation to hiqh-lime plant chlorosis than has been previously given it. |
