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An evaluation of some techniques in agrometeorology (Methods relating to problems in cultivated plants)Wang, J. Y. January 1958 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1958. / Typescript. Abstracted in Dissertation abstracts, v. 18 (1958) no. 4, p. 1471. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 166-172).
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Contribution à l'étude de l'influence des éléments météorologiques sur l'accroissement des forêtsPrimault, Bernard, January 1900 (has links)
Thèse--Zurich. / Vita. "Extrait de la Revue geofisica pura e applicata, vol. 24 (1953)." Summary in French, German and English. Bibliography: p. 55-58.
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Water budget estmates from weather dataWang, Su Chiang. January 1962 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 53-54).
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Web-based teaching, learning and research using real-time data from field-based agrometeorological measurement systems.Savage, Michael J. 21 July 2014 (has links)
Abstract available in print version only. / Thesis (M.Sc.Agric.)-University of KwaZulu-Natal, Pietermaritzburg, 2014.
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Integrating real-time weather data with dynamic crop development modelsDonaldson, William S. 14 November 1991 (has links)
Crop development models are commonly used in research.
However, their use as crop management tools for growers is
rare. Decision support systems (DSS), which combine crop
models with expert systems, are being developed to provide
management assistance to growers. Researchers at Oregon
State University are in the process of developing a DSS.
Research was conducted to develop a computer program to
provide current and generated weather data for use by the
DSS. The objectives of this research were to obtain a
weather station, develop a set of quality control procedures
to check data from the station, obtain a weather generator
program, and create a weather data manager program to
implement the above objectives.
A weather station was obtained and was placed near two
existing weather stations for ten months. Data from the
weather station was compared with the other two stations for
values of monthly average maximum temperature, minimum
temperature, and daily total solar radiation and monthly
total precipitation. The weather station performed well.
Only measurements of total daily solar radiation were
consistently different from the other stations. Based on a
comparison of the weather station with an Eppley
pyranometer, a factor was calculated to correct the solar
radiation readings.
The quality control procedures used on the weather data
were adapted from automated procedures given in the
literature. When tested, the procedures performed as
desired. When used on actual data from the weather station,
values that failed the procedures were apparently legitimate
values. Options were added to the data manager program that
allow the user to quickly decide what to do with failed
values.
For a weather data generator, WGEN was chosen from the
generators presented in the literature. An input parameter
file was created for the Corvallis, Oregon area and thirty
years of data were generated. Monthly means from this data
were compared with thirty-year historical monthly means for
Corvallis. Precipitation data from WGEN compared well with
the historical data. The generated data for maximum and
minimum temperature and daily total solar radiation had
great differences from the historical data. It is believed
that the input parameters for the Corvallis area suggested
by the authors of WGEN are not appropriate.
The weather data manager program was written in the C
programming language, and occupies approximately 98
kilobytes of disk space, not including the eleven files
created directly and indirectly by the program. The main
functions of the program are: 1) retrieving data from the
weather station and performing quality control procedures on
the data (allowing the user to decide what to do with values
that failed QC); 2) viewing and editing of files by the
user; 3) weather data generation (creating a file of only
generated data or appending generated data to the file of
current data from the weather station to create a file
containing a full year of weather data); and 4)
miscellaneous functions (monitoring the weather station,
setting the calendar in the station's datalogger, and
changing information used by the data manager program).
It is hoped that this program will be a significant
contribution towards the development of a decision support
system. / Graduation date: 1992
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Modelling the impacts of increased air temperature on maize yields in selected areas of the South African highveld using the cropsyst model.Pasi, Jonathan M. 21 July 2014 (has links)
Abstract available in PDF file. / Thesis (M.Sc.Agric.)-University of KwaZulu-Natal, Pietermaritzburg, 2014.
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Spatial distribution and co-occurrence of surface-atmosphere exchange processesMitic, Constance M. (Constance Maria) January 1993 (has links)
Grid-type flight patterns at an altitude of 30 m were executed in the summer of 1991 by the Canadian Twin Otter flux research aircraft over a 15 km x 16.5 km agricultural area, as part of the San Joaquin Valley Air Quality Study/California Ozone Deposition Experiment (SJVAQS/CODE). Fast-response on board sensors for turbulence, temperature and gas concentrations permitted the spatial mapping of fluxes of momentum, sensible heat, moisture, CO$ sb2$ and ozone. Flux maps were produced in the form of GIS-interpolated 1 km averages, and in the discrete form of those coherent structures of the turbulent process, intermittent in time and space, which dominate the exchange of scalars between the ground and the atmosphere. The magnitude of surface-related mesoscale contributions to the flux was also quantified. Flux observations were compared against radiometrically observed surface temperatures and vegetation indices (NDVI), observed from aircraft and satellite (NOAA AVHRR), and surface characteristics from ground surveys. / Flux maps showed the expected correspondence between greenness, evapo(trans)ration (ET) and CO$ sb2$ exchange. Discrepancies between ozone flux maps and maps of greenness, ET or CO$ sb2$ were more pronounced than would be consistent with the hypothesis of stomatal control of ozone uptake. More insight into control mechanisms on ozone exchange is gained by an examination of the spatial coincidence between transporting structures for the various scalars (heat, moisture, CO$ sb2$ and ozone), through the Jaccard coefficient of co-location (J), which showed a lower value ($ rm0.3<J<0.6$) for coincidence in transfer between ozone and moisture than between moisture and CO$ sb2$ ($ rm0.5<J<0.8$). Analysis of J over the various land-use and crop-types in the test area, opens a door to a more differentiated understanding of the physical and physiological driving forces behind ozone uptake by soil and vegetation.
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Climatic water balance and agricultural production in the Northern Plains of West JavaResosudarmo, Sudjiran January 1977 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii at Manoa, 1977. / Bibliography: leaves [217]-251. / Microfiche. / xiv, 251 leaves ill., maps
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Dancing in the rain : farmers and agricultural scientists in a variable climate /Hayman, P. T. January 2001 (has links)
Thesis (Ph.D.)--University of Western Sydney, Hawkesbury, 2001. / A thesis submitted to the Faculty of Environmental Management and Agriculture, University of Western Sydney, in fulfilment of the rquirements for the degree of Doctor of Philosophy, 2001. Bibliography : p. 252-276.
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Spatial distribution and co-occurrence of surface-atmosphere exchange processesMitic, Constance M. (Constance Maria) January 1993 (has links)
No description available.
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