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  • 1985-1989  (4)
  • 1975-1979  (5)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Studies on the mineral nutrition of tea (1975)
    Springer
    Plant and soil 43 (1975), S. 259-278 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phosphate fertilizer incorporated in the soil placed around tea plants when planted in the field produced a large improvement in the rate of growth of the plants, thus indicating that tea in acid soils had a demand for phosphate. Yield responses to phosphate fertilizer applied to mature tea were uncommon and the pattern of these confused. This work showed that mature tea will absorb phosphate and give positive yield responses when there is an undisturbed mulch layer on the soil surface. Within this layer phosphate is maintained in a more available form and many highly active roots are formed. These conditions are destroyed by manual weeding; the mulch forms naturally from tea leaves and prunings where no-cultivation herbicidal weed control is practised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928491
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Studies on the mineral nutrition of tea (1975)
    Springer
    Plant and soil 43 (1975), S. 259-278 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phosphate fertilizer incorporated in the soil placed around tea plants when planted in the field produced a large improvement in the rate of growth of the plants, thus indicating that tea in acid soils had a demand for phosphate. Yield responses to phosphate fertilizer applied to mature tea were uncommon and the pattern of these confused. This work showed that mature tea will absorb phosphate and give positive yield responses when there is an undisturbed mulch layer on the soil surface. Within this layer phosphate is maintained in a more available form and many highly active roots are formed. These conditions are destroyed by manual weeding; the mulch forms naturally from tea leaves and prunings where no-cultivation herbicidal weed control is practised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928491
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Studies on the mineral nutrition of tea (1975)
    Springer
    Details
    Publication Date: 1975-08-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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    PAPER CURRENT
  • 4
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    Numerical simulation of hypersonic, axisymmetric flowfields (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Flow conditions corresponding to those of three previously conducted hypersonic axisymmetric flow experiments are presently treated by numerical solutions of the axisymmetric, thin layer Navier-Stokes equations with the Chemistry and Gasdynamic Implicit computer code's Version 2. While simulation and experimental results agree for ideal gas flows, the simulation for the case of a real gas flow reveals that the particular coupling of the gasdynamics and the chemistry used in the code degrades the convergence level obtainable, by comparison with ideal gas cases. The computed stagnation point heating is 60 percent lower than for the experiment.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 86-1285
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Aerothermodynamic environment for a Titan probe with deployable decelerator (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: It is pointed out that further exploration of Titan, Saturn's largest moon, is of current interest to the scientific community, particularly from the standpoint of the organic chemical evolution of its atmosphere. For a suitable study of this Saturnian satellite, a mission involving a Titan atmospheric entry probe is to be conducted. The probe is to employ a deployable decelerator with the aim to allow scientific measurements in the haze layer. The present investigation is concerned with an assessment of the aerothermodynamic environment for the considered probe during its hypervelocity, low-Reynolds-number entry. Attention is given to the employed computational method, the Titan probe configuration, the Titan probe trajectory, the viscous-layer regime of the aerothermodynamic environment, and the incipient merged-layer regime.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 85-1063
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Radiative viscous-shock-layer analysis of Fire, Apollo, and PAET flight data (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Equilibrium, radiating viscous-shock-layer solutions are obtained for a number of trajectory points of the Fire II, Apollo 4, and PAET experimental flight vehicles. Convective heating rates calculated by a benchmark code agree well, except at high altitudes corresponding to low densities, with two engineering correlations. Calculated radiation intensities are compared with the flight radiometer data and with inviscid flow results. Differences as great as 70 percent are observed between measured data and the viscous calculations. Viscous effects reduce the intensity toward the wall, because of boundary-layer absorption, by as much as 30 percent, compared with inviscid intensities. Preliminary chemical and thermal nonequilibrium flow calculations along a stagnation streamline for a PAET trajectory predict enhancement of radiation owing to chemical relaxation. Stagnation point solutions are also presented for future air-assisted orbital transfer vehicle geometries with nose radii ranging from 0.3 to 15 m.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 85-1064
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    CAG12 - A CSCM based procedure for flow of an equilibrium chemically reacting gas (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Conservative Supra Characteristic Method (CSCM), an implicit upwind Navier-Stokes algorithm, is extended to the numerical simulation of flows in chemical equilibrium. The resulting computer code known as Chemistry and Gasdynamics Implicit - Version 2 (CAG12) is described. First-order accurate results are presented for inviscid and viscous Mach 20 flows of air past a hemisphere-cylinder. The solution procedure captures the bow shock in a chemically reacting gas, a technique that is needed for simulating high altitude, rarefied flows. In an initial effort to validate the code, the inviscid results are compared with published gasdynamic and chemistry solutions and satisfactorily agreement is obtained.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 85-0927
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Numerical simulation of experiments in the Giant Planet Facility (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Utilizing a series of existing computer codes, ablation experiments in the Giant Planet Facility are numerically simulated. Of primary importance is the simulation of the low Mach number shock layer that envelops the test model. The RASLE shock-layer code, used in the Jupiter entry probe heat-shield design, is adapted to the experimental conditions. RASLE predictions for radiative and convective heat fluxes are in good agreement with calorimeter measurements. In simulating carbonaceous ablation experiments, the RASLE code is coupled directly with the CMA material response code. For the graphite models, predicted and measured recessions agree very well. Predicted recession for the carbon phenolic models is 50% higher than that measured. This is the first time codes used for the Jupiter probe design have been compared with experiments.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Type: AIAA PAPER 79-1102 , American Institute of Aeronautics and Astronautics, Thermophysics Conference; Jun 04, 1979 - Jun 06, 1979; Orlando, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Aerothermodynamic environment for Jovian entry with silica heat shield (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Solutions are presented for the stagnation-region shock-layer equations, including radiative transfer with spectral lines and silica ablation during Jovian entry. Results for variations of entry angle, sphere-cone configuration, and atmospheric model are given. The effect of silica ablation on the radiative and convective surface heating is correlated with the ratio of the wall to free-stream mass flux. Correlations are also given for spectral distributions. The effect of newly obtained SiO radiation properties on the surface heating is examined.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 78-186 , Aerospace Sciences Meeting; Jan 16, 1978 - Jan 18, 1978; Huntsville, AL
    Format: text
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    NASA TECHNICAL REPORTS
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