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Nitrogenase activity (C2H2 reduction) was found to be associated with the following grasses in the field: Agropyron dasystachyum, Agropyron smi thi i , Aristida purpurea, Oryzopsis hymenoides and Stipa comata. Uptake of fixed nitrogen was also demonstrated for these grasses. Two unidentified nitrogen fixing bacteria were isolated, one from Stipa comata and one from Aristida purpurea. Cynodon dactyl on and Agropyron cristatum were successfully inoculated with the unknown isolate obtained from Stipa comata. The inoculated plants exhibited nitrogenase activity (C2 H2 reduction) whereas uninoculated controls gave negative results.
Tags: Nitrogren
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Eocene conglomerate resting unconformably on upturned edges of Marine Jurassic, Weber Canyon one mile above Croydon. The mountain on the right is composed of Triassic red beds. Utah. 1903.
Categories: Image; Tags: Eocene, Utah, photo print
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USGS office in Washington, D.C. 1917.
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Album caption: Vertical aerial view of construction site in the Lutes Run basin. Approximate scale 1:22,800. Montgomery County, Maryland. March 16, 1964. (Graphics on published photo only) Portion published as figure 22-A in U. S. Geological Survey. Professional paper 1003. 1978.
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Long Island, New York. Lake Surprise in a kettlehole of the Harbor Hill moraine 1 1/2 miles south of Manhassett. Oyster Bay quadrangle. Nassau County, New York. October 21, 1917.
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Album caption: Peter, and his family. July 10th. No index card available.
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Strata in lower part of San Joaquin formation and upper part of Etchegoin formation of North Dome: Blue sandstone of Cascajo conglomerate member of San Joaquin formation cutting across first blue sandstone of underlying Etchegoin formation at head of Arroyo Delgado on west side of Cerro Alto, sec. 28, T. 22 S., R. 18 E; Cascajo conglomerate to the left and first blue sandstone to right. Kings County, California. 1931. Plate 25-B, U.S.Geological Survey Professional Paper 195. 1940.
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Tidal bore Turnagain Arm, Cook Inlet Region, Alaska. The bore is moving from right to left, followed by the flood tide. Cook Inlet Region, Alaska. n.d. Portion published as Figure 1, in U.S. Geological Survey, Circular 1022. 1988.
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Contact of Jurassic and Cretaceous formations on branch of Henrieville Creek. Winsor formation (base), Dakota? sandstone. Garfield County, Utah. 1932. Published as figure 16 in U.S. Geological Survey Professional Paper 226. 1951.
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Guatemala Earthquake 1976. Typical appearance of the Motagua fault rupture that caused the destructive earthquake. Earthquake Information Bulletin, v. 8, no. 3., p. 7.
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Burma Earthquake July 8, 1975. Destroyed temples at Pagan. Earthquake Information Bulletin, v. 7, no. 5., p. 20.
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Yosemite National Park, California. Silhouette view of the gorge that separates Liberty Cap from the Nevada Fall platform. This gorge was, at one time, the channel of the Merced River and still carries off some of the flood waters in spring. The trail to the top of the Nevada Fall is laid through it. Circa 1913.
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Turkey Earthquake September 6, 1975. A high school building in Lice with structural damage after the earthquake. Photo by P.I. Yanev. Earthquake Information Bulletin, v. 8, no. 2, back cover.
map background search result map search result map Burma Earthquake. Destroyed temples at Pagan. Burma. 1975. Turkey Earthquake September 6, 1975. A high school building in Lice with structural damage after the earthquake. Guatemala Earthquake 1976. Typical appearance of the Motagua fault rupture that caused the destructive earthquake. Contact of Jurassic and Cretaceous formations on branch of Henrieville Creek. Garfield County, Utah. 1932. Peter and his family, Arctic Village. Alaska. 1926. Strata in lower part of San Joaquin formation and upper part of Etchegoin formation of North Dome. Kings County, California. 1931. Vertical aerial view of construction site in the Lutes Run basin. Montgomery County, Maryland. 1964. WMR 266 - Mercury Dome Mine, Camp Floyd District. Tooele County, Utah. 1944. WMR 286 - Rambler Mine. Albany County, Wyoming. 1944. WMR 294 - Semi-Pilot Plant Investigations of the Nitrogen Dioxide Process for Beneficiation of Manganese Ores. Mohave County, Arizona. 1944. WMR 296 - Nutt-Bailey Bauxite Deposit. Pulaski County, Arkansas. 1944. WMR 364 - Anson Betts Manganese Mine. West Cummington, Hampshire County, Massachusetts. 1945. WMR 375 - Penn Mine Slag Dump. Calaveras County, California. 1945. WMR 381 - Mon-Ark Mines. Christian County, Missouri. 1945. WMR 296 - Nutt-Bailey Bauxite Deposit. Pulaski County, Arkansas. 1944. Strata in lower part of San Joaquin formation and upper part of Etchegoin formation of North Dome. Kings County, California. 1931. WMR 375 - Penn Mine Slag Dump. Calaveras County, California. 1945. WMR 286 - Rambler Mine. Albany County, Wyoming. 1944. Contact of Jurassic and Cretaceous formations on branch of Henrieville Creek. Garfield County, Utah. 1932. WMR 266 - Mercury Dome Mine, Camp Floyd District. Tooele County, Utah. 1944. WMR 294 - Semi-Pilot Plant Investigations of the Nitrogen Dioxide Process for Beneficiation of Manganese Ores. Mohave County, Arizona. 1944. Guatemala Earthquake 1976. Typical appearance of the Motagua fault rupture that caused the destructive earthquake. Turkey Earthquake September 6, 1975. A high school building in Lice with structural damage after the earthquake. Burma Earthquake. Destroyed temples at Pagan. Burma. 1975. Peter and his family, Arctic Village. Alaska. 1926.