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  • 1
    Electronic Resource
    Electronic Resource
    Database tools for enhanced analysis of TMX-U data (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 1929-1931 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A commercial database software package has been used to create several databases and tools that assist and enhance the ability of experimental physicists to analyze data from the Tandem Mirror Experiment-Upgrade (TMX-U) experiment. This software runs on a DEC-20 computer in M-Divisions's User Service Center at Lawrence Livermore National Laboratory (LLNL), where data can be analyzed off line from the main TMX-U acquisition computers. When combined with interactive data analysis programs, these tools provide the capability to do batch-style processing or interactive data analysis on the computers in the USC or the supercomputers of the National Magnetic Fusion Energy Computer Center (NMFECC) in addition to the normal processing done by the TMX-U acquisition system. One database tool provides highly reduced data for searching and correlation analysis of several diagnostic signals within a single shot or over many shots. A second database tool provides retrieval and storage of unreduced data for use in detailed analysis of one or more diagnostic signals. We will show how these database tools form the core of an evolving off-line data analysis environment on the USC computers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138799
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of gypsum on growth and mineral content of Brussels sprouts, and soil properties of Orthic Podzols (1990)
    Springer
    Nutrient cycling in agroecosystems 24 (1990), S. 77-84 
    Details
    ISSN: 1573-0867
    Keywords: Brussels sprouts ; calcium ; calcite ; elemental sulphur ; gypsum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Studies of crop response to Ca fertilizers are generally few as well as information concerning the Ca nutrition of Brussels sprouts (Brassica oleracea var.gemmifera). Six field studies were conducted, over three years, to determine yield response of Brussels sprouts to soil applied gypsum (CaSO4.2H2O), lime (calcite), and elemental S on sandy loam to loamy sand Orthic Podzols in Prince Edward Island. Relative yield of marketable (0–32mm) Brussels sprouts were related to soil ammonium acetate extractable Ca (r = 0.71). The highest yields (11 to 13 t ha−1) were associated with an extractable Ca of above 400µg g−1 soil, while a Ca level below 400µg reduced yield by 20%. Highest marketable yields were associated with a Ca level in the leaf tissue (in upper mature leaves at sprout formation) of above 2.2% (w/w) (r = 0.55), this in turn was associated (r = 0.87) with an extractable soil Ca above 400µg g−1 soil. Calcite and elemental S did not influence yield or mineral content. Gypsum, as expected increased leaf S content, but leaf tissue S levels were not related to marketable yield. Slight decreases in soil pH due to increasing gypsum rate (0.5–4.3 t ha−1) were associated with changing accumulations of B, Mn, Fe, Ca, and Zn in the leaf tissue. Gypsum had little effect on soil porosity and structure indices, but changing pH (in both gypsum and lime treatments) significantly influenced soil microbial biomass.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01073225
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  • 3
    Electronic Resource
    Electronic Resource
    The influence of tillage on the proportion of organic carbon and nitrogen in the microbial biomass of medium-textured soils in a humid climate (1991)
    Springer
    Biology and fertility of soils 11 (1991), S. 135-139 
    Details
    ISSN: 1432-0789
    Keywords: Microbial biomass ; Organic matter dynamics ; Reduced tillage ; Podzolic soils ; Chloroform fumigation method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Microbial biomass C and N respond rapidly to changes in tillage and soil management. The ratio of biomass C to total organic C and the ratio of mineral N flush to total N were determined in the surface layer (0–5 cm) of low-clay (8–10%), fine sandy loam, Podzolic soils subjected to a range of reduced tillage (direct drilling, chisel ploughing, shallow tillage) experiments of 3–5 years' duration. Organic matter dynamics in the tillage experiments were compared to long-term conditions in several grassland sites established on the same soil type for 10–40 years. Microbial biomass C levels in the grassland soils, reduced tillage, and mouldboard ploughing treatments were 561, 250, and 155 μg g-1 soil, respectively. In all the systems, microbial biomass C was related to organic C (r=0.86), while the mineral N flush was related to total N (r=0.84). The average proportion of organic C in the biomass of the reduced tillage soils (1.2) was higher than in the ploughed soils (0.8) but similar to that in the grassland soils (1.3). Reduced tillage increased the average ratio of mineral N flush to total soil N to 1.9, compared to 1.3 in the ploughed soils. The same ratio was 1.8 in the grassland soils. Regression analysis of microbial biomass C and percent organic C in the microbial biomass showed a steeper slope for the tillage soils than the grassland sites, indicating that reduced tillage increased the microbial biomass level per unit soil organic C. The proportion of organic matter in the microbial biomass suggests a shift in organic matter equilibrium in the reduced tillage soils towards a rapid, tillage-induced, accumulation of organic matter in the surface layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336378
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamics of soil microbial biomass N under zero and shallow tillage for spring wheat, using15N urea (1984)
    Springer
    Plant and soil 76 (1984), S. 157-164 
    Details
    ISSN: 1573-5036
    Keywords: Biomass ; Chernozemic soils ; Chloroform fumigation ; Microbial biomass N ; 15N-urea ; Spring wheat ; Urea ; Zero and shallow tillage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field studies to determine the effect of zero and shallow (10 cm) cultivation on microbial biomass were conducted on several Chernozemic soils in western Canada. Using the CHCl3 fumigation method, the distribution of microbial biomass N and the immobilization and subsequent release of added15N (15N-urea) from the microbial biomass were determined in the A horizon, at the 0 to 5 and 5 to 10 cm depth, during the growing season for spring wheat. Temporal variation in microbial biomass N, associated with the development of the rhizosphere, was characterized by an increase between Feekes stage 1 and 5 or 10 and decrease at Feekes stage 11.4. Over the long term, the variation in biomass N between tillage systems corresponded with crop residue distribution. Immobilization of fertilizer N was related to the increase in biomass N from Feekes stage 1, which in turn, was associated with the incorporation of recent crop residues or levels of labile organic matter in the surface soil. The study demonstrated the relatively rapid remineralization of immobilized fertilizer N under field conditions and emphasized the role of the microbial biomass N as both a sink and source of mineral N.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02205576
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  • 5
    Electronic Resource
    Electronic Resource
    Association of soil macroporosity and relative saturation with root rot severity of spring cereals (1989)
    Springer
    Plant and soil 120 (1989), S. 149-152 
    Details
    ISSN: 1573-5036
    Keywords: anaerobiosis ; humid soil moisture regime ; root disease ; soil compaction ; soil structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An empirical model was developed using multiple regression to describe the relationship between measured values of relative saturation, macropore volume, and soil moisture content in a Charlottetown fine sandy loam, an Orthic Humo-Ferric Podzol (Cryorthod). The model was used to characterize the incidence of root rot severity in spring cereals, under a mouldboard ploughed and direct drilled tillage system. As soil macropore volume decreased from 14.5 to 8.5% (v/v) root rot severity increased from 50 to 72%. This was associated with an increase in relative saturation from 60 to 74%. The results illustrate the interaction between soil structure and root disease under humid soil moisture regimes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370301
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  • 6
    Electronic Resource
    Electronic Resource
    Mineral composition and growth of Colorado spruce (Picea pungens) seedlings under calcareous soil conditions (1986)
    Springer
    Plant and soil 94 (1986), S. 341-348 
    Details
    ISSN: 1573-5036
    Keywords: Calcareous soil ; Foliar analysis ; Growth pattern ; Nitrogen nutrition ; Picea pungens Engeln ; Prairie ; Provenances
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field studies were conducted to assess the mineral nutrition and growth of Colorado spruce (Picea pungens Engln) seedlings (2–4 yr) from provenances selected for superior growth on calcareous prairie soils. Tissue nutrient concentrations and response to nitrogen were determined by use of foliar analysis and growth pattern studies. Soil conditions ranged from 7.6–7.8 for pH, 12–23% for total CaCO3, and 5–6% for active CaCO3. Foliage mineral composition showed relatively low phosphorus (0.09–0.15%) and high calcium (0.45–1.52%) assimilation. Seasonal growth and seedling response to added nitrogen was not adversely affected by the calcareous soil condition. Levels of nitrogen in the foliage required for optimum growth ranged from 1.5–2.0% and were similar to that of other conifer species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374328
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  • 7
    Electronic Resource
    Electronic Resource
    Growth and mineral composition of barley and wheat across sequences of Solonetzic soil (1983)
    Springer
    Plant and soil 74 (1983), S. 229-235 
    Details
    ISSN: 1573-5036
    Keywords: Barley ; Hordeum vulgare ; Mineral composition ; Na−K interaction ; Solonetzic soil ; Solonetz-Solod sequence ; Triticum aestivum ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The growth and mineral composition of barley and wheat was measured across sequences of Solonetz and Solod soils. Growth of both species, along with root penetration was reduced on the Solonetz compared to the Solod soil. Mineral composition of the foliage and roots indicated that a Na−K interaction was present for the barley across the Solonetz-Solod sequences. Such factors were considered to be characteristics of soil—plant relationships on Solonetzic soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02143613
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  • 8
    Electronic Resource
    Electronic Resource
    Association of cation and organic anion accumulation with iron chlorosis of Scots pine on prairie soils (1980)
    Springer
    Plant and soil 56 (1980), S. 293-300 
    Details
    ISSN: 1573-5036
    Keywords: Calcareous soils ; Calcium ; Cation-anion balance ; Induced-iron chlorosis ; Nitrate ; Organic anions ; Pinus sylvestris L ; Prairie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Iron chlorosis of 4 year old Scots pine (Pinus sylvestris L.) in comparison to areas of adjacent healthy growth on calcareous prairie soil, was associated with slight increases in the soluble ion content of the saturation paste extract. Such increases in soluble ions (mainly calcium sulphate) were associated with significant increases in ash, cation (including iron) and organic anion content of the chlorotic needles. Increasing levels of available soil nitrate were also related to increase in organic anions. Nitrogen and phosphorus assimilation was adversely affected under conditions of iron chlorosis. These observations support the theory of induced iron deficiency associated with elevated levels of organic anions or translocated cations and are applicable to plantings of conifers on prairie soils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02205858
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  • 9
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    Thermal-Barrier Production and Identification in a Tandem Mirror (1984)
    American Physical Society
    Details
    Publication Date: 1984-08-20
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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  • 10
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    Measurement of the spatial coherence of a soft-x-ray laser (1992)
    American Physical Society
    Details
    Publication Date: 1992-02-03
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society
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