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AbstractAbstract
[en] We compared estimates of leaf area index obtained by the LAI-2000 plant canopy analyzer (LAIPCA) to direct estimates of LAI ('true' LAI) obtained through allometric relationships. This was done for two Scots pine (Pinus sylvestris L.) stands, where LAI was gradually reduced by removing branches and whole trees. LAI (defined on a hemisurface area basis) decreased from 2.24 to 0.50 in the branch removal experiment and from 1.58 to 0.29 in the tree removal experiment. The aim of the study was to analyse the variation in the ratio of the LAI-2000 estimate to the true LAI (LAIPCA/LAI) with changes in stand structure and total leaf area. In the tree removal plot, which had a smaller proportion of woody (branch) area, LAIPCA/LAI remained fairly stable (0.63-0.69) and was smaller than that in the branch removal plot, where LAIPCA/LAI increased from 0.76 to 1.16 along with the decrease in leaf area and a subsequent increase in woody (stem) area. The ratio of LAIPCA to the plant area index (PAI) differed less between plots but remained higher in the branch removal plot (increasing from 0.56 to 0.69) than in the tree removal plot, where it varied between 0.55 and 0.60. Results were analysed with the help of a theoretical canopy radiation model, which can be inverted to give LAI based on the gap fraction values measured by the LAI-2000 and stand structural parameters. Model-inverted LAI agreed well with directly measured LAI, suggesting that the model is a useful tool for correcting bias in the LAI-2000 estimates because of grouping of leaf area and the contribution of woody area. (author)
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14 refs., 3 tabs., 3 figs.
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Journal Article
Journal
Canadian Journal of Remote Sensing; ISSN 0703-8992;
; v. 29(3); p. 363-370

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Freeman, Eugene J; Khaleel, Raziuddin; Heller, Paula R
Pacific Northwest National Lab., Richland, WA (United States). Funding organisation: US Department of Energy (United States)2001
Pacific Northwest National Lab., Richland, WA (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
[en] The purpose of this catalog is to integrate all available soil physics data and information from vadose zone characterization and performance assessments into one usable, scientifically defensible document
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24 Sep 2001; [vp.]; AC06-76RLO1830; Available from Pacific Northwest National Lab., Richland, WA (US)
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Report
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ROBERTS, JESSE D.; JEPSEN, RICHARD A.; BRYAN, CHARLES R.; CHAPIN, D. MICHAEL JR.
Sandia National Labs., Albuquerque, NM (United States); Sandia National Labs., Livermore, CA (United States). Funding organisation: US Department of Energy (United States)2001
Sandia National Labs., Albuquerque, NM (United States); Sandia National Labs., Livermore, CA (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
No abstract available
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Source
1 Nov 2001; 45 p; AC04-94AL85000; Available from Sandia National Labs., Albuquerque, NM (US)
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Report
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AbstractAbstract
[en] The European Geosciences Union (EGU) General Assembly 2015 that took place at the Austria Center of Vienna, from 12-17 April 2015, was a big success with 4870 oral, 8489 poster, and 705 PICO (Presenting Interactive COntent™) presentations as well as 11837 scientists attending from 108 different countries. This year again, the activities of the SWMCN Laboratory were well represented with 3 PICO presentations during the SSS12.10 session (i.e. Soil and sediment tracing techniques for understanding environmental processes)
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Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Soil and Water Management and Crop Nutrition Section, Vienna (Austria); FAO/IAEA Agriculture and Biotechnology Laboratory, Seibersdorf (Austria); 40 p; ISSN 1011-2650;
; Feb 2016; p. 34-35; Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/Newsletters/SNL-38-2.pdf; Web sites: http://www-naweb.iaea.org/nafa/index.html; Photo

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Mitchell, R.M.
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)1997
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)1997
AbstractAbstract
[en] This document provides a detailed description of the environmental samples collected from the 216-A-29 Ditch in 1988. Tables summarizing the laboratory data for radionuclides, metals, and soil chemistry are included
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1 Mar 1997; 119 p; EW--3130010; AC06-6RL13200; Available from OSTI as DE00016879
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Miscellaneous
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AbstractAbstract
No abstract available
Original Title
Nevsehir Ili Topraklarinin Bitkiye Yarayisli Kuekuert Miktarlarinin Belirlenmesinde Uygulanacak Yoentemler
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Source
Turkish Atomic Energy Authority, Ankara (Turkey); Uludag University, Bursa (Turkey); 144 p; 1997; p. 77-83; 4. International Congress of Nuclear Agriculture and Animal Science; 4. Ulusal Nuekleer Tarim ve Hayvancilik Kongresi; Bursa (Turkey); 25-27 Sep 1996
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Miscellaneous
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Conference
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AbstractAbstract
[en] Aim of study: A field study was conducted to assess responses of soil organic C (SOC) and total N (TN) to film mulching and manure, which were important in identifying the changes of SOC and TN. Area of study: A semiarid area in northwestern China. Material and methods: The field (soil classified as CumuliUstic Isohumosol) has been planted with spring maize (Zea mays L.) for years. Three treatments were: 1) NPK fertilization and no film mulching (CK), 2) NPK fertilization and film mulching (PF) and 3) film mulching and NPK fertilization combined with cow manure (OMF). Main results: Compared with CK, OMF significantly increased SOC and TN, while no significant effect was observed under PF. The average increases of SOC storage in OMF were 39.2% in 0-10 cm layer and 34.3% in 10-20 cm layer. The average increases of TN storage were 37.6% in 0-10 cm layer and 31.3% in 10-20 cm layer, relative to CK. Compared with the initial SOC (8.86 g/kg) and TN (0.99 g/kg), CK and PF decreased 1.4% and 6.9% of SOC, and 9.1% and 17.2% of TN, whereas OMF increased SOC and TN. The SOC/TN was not affected by treatments but slight increase was observed since the beginning of experiment. Both PF and OMF significantly increased maize grain yields (on average 45.8% and 75.7%, respectively) compared with CK. Research highlights: Manure combined with film mulching significantly increased soil C and N, ameliorating harmful effects of plastic film mulching, improving soil fertility in the long term and increasing crop yields.
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Available from: http://revistas.inia.es/index.php/sjar/issue/view/159
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Journal Article
Journal
Spanish Journal of Agricultural Research (Online); ISSN 2171-9292;
; v. 17(3); 9 p

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Carey, Grant R., E-mail: gcarey@porewater.com
Proceedings of the 6th International Contaminated Site Remediation Conference2015
Proceedings of the 6th International Contaminated Site Remediation Conference2015
AbstractAbstract
[en] Delineation of the horizontal and vertical extent of NAPL source zones is required when insitu source treatment is to be implemented at a site. Estimation of NAPL mass may be helpful at some sites for evaluating remediation timeframe and tracking remedial progress. These two characterization goals are both challenging to implement at typical NAPL sites, particularly when NAPL is sparsely present or is not readily observed in soil cores. This review presents various methods available for NAPL source zone delineation and mass estimation, including several case studies to demonstrate the efficacy of these methods. (author)
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Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Newcastle University, Callaghan, NSW (Australia); 632 p; ISBN 978-1-921431-47-0;
; Sep 2015; p. 42-43; CleanUp 2015: 6. International Contaminated Site Remediation Conference; Melbourne, VIC (Australia); 13-16 Sep 2015; Also available from CRC CARE, C/- Newcastle University LPO, Callaghan, NSW 2308, Australia; Also available online from: http://www.cleanupconference.com/wp-content/uploads/2018/12/CLEANUP_2015_PROCEEDINGS-web.pdf; 2 figs.

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AbstractAbstract
[en] The problem associated with black cotton and lateritic soils because of the swelling-shrinkage property of their constituent clay minerals were investigated. Samples of black cotton lateritic soils were collected from different parts of Kenya. The samples were analysed for their mineral compositions and later treated with hydrated lime in order to eliminate the swelling shrinkage behaviour. The samples were subsequently tested for their engineering properties in a soil mechanics laboratory using shear box and Casagrande apparatus. It was found that the chemical treatment of the soils with hydrated lime removes their plastic property and improves their shear strength. (author)
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Available from the Kenya National Academy of Sciences P.O. Box 39450, Nairobi, Kenya; 5 refs., 13 graphs, 3 tabs., 1 map
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Journal Article
Journal
Kenya Journal of Science and Technology. Series A, Physical and Chemical Sciences; ISSN 0250-8265;
; CODEN KSTSDG; v. 7(1); p. 5-23

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AbstractAbstract
No abstract available
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FAO/AGRIS record; ARN: NL1999002275; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
Journal
Soil and tillage research; ISSN 0167-1987;
; v. 49(3); p. 249-253

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