Results 221 to 230 of about 9,141 (253)
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Are leaf area index (LAI) and flowering related to oil productivity in peppermint?
Flavour and Fragrance Journal, 1994AbstractLeaf area index (LAI) was calculated in flowering (FP) and flower bud removed (NFP) peppermint (Mentha x piperita L.) plants and related to essential oil productivity. The LAI was calculated using computerized image analysis, while the essential oils were distilled from leaves and flowers separately and analysed by GC–MS.
Massimo Maffei +2 more
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Evaluation of LAI-2000 for leaf area index monitoring in paddy rice
Field Crops Research, 2006Leaf area index (LAI) is a variable of primary importance for crop monitoring and it is usually measured by labor intensive destructive field sampling. Indirect non-destructive estimates by optical instruments are a competitive alternative to direct methods for frequent measurements and over large areas.
Stroppiana D +4 more
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Rice Leaf Area Index (LAI) estimates from hyperspectral data
SPIE Proceedings, 2003In this paper, we report some correlation analysis results between hyperspectral data in the spectral range of approximately 350nm-935nm and LAI of rice. Hyperspectral measurements were taken using an Analytical Spectral Devices (ASD) FieldSpec UV/VNIR Spectroradiometer at the experiment farm in 1999 and 2000.The potential of hyperspectral data for ...
Xiuzhen Wang +3 more
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Leaf area index (LAI) map of a protected area within the caldera of Vico Lake (Italy)
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology, 2003ABSTRACT Structural traits of the vegetation types and plantations occurring in a protected area within the caldera of Vico Lake (Italy) were analysed. There were significant correlations among structural traits, at leaf and stand level. Leaf area index (LAI) and specific leaf area (SLA) were the most significantly correlated traits. LAI rose according
GRATANI, Loretta +2 more
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Leaf Area Index (LAI) of wood and scrub vegetation of the wetland area
2007Leaf Area Index (LAI) is on of the most important environmental parameters because it reflects a range of ecological processes which have a significant influence on energy and mass exchange between any ecosystem and the atmosphere. In this paper some results of LAI measurement are presented.
Jacek Leśny +3 more
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Estimating Urban Leaf Area Index (LAI) of Individual Trees with Hyperspectral Data
Photogrammetric Engineering & Remote Sensing, 2012This study estimated leaf area index (LAI) of individual urban trees as a function of spectral features derived from airborne hyperspectral data. Candidate features included spectral indexes, principal components, and calibrated reflectance values. Hyperspectral images were acquired over Provo, Utah area, and LAI of 204 deciduous trees was measured in ...
Ryan R. Jensen +2 more
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Estimation of leaf area index with the Li-Cor LAI 2000 in deciduous forests
Forest Ecology and Management, 1998Abstract The present study has been performed in Italy, in stands of the main broad-leaved forest species. Thinned and unthinned stands of Quercus cerris L. (6.3% of total area covered by deciduous species in Italy), Castanea sativa L., (8.5%) and Fagus sylvatica L. (12.6%) were selected from 15 permanent plots.
Andrea Cutini +2 more
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Measuring Leaf Area Index with the Li‐Cor LAI‐2000 in Pine Stands
Ecology, 1994Because leaf area index (projected one-sided leaf surface area per unit ground surface area, hereafter referred to as LAI) is a critical variable in models that attempt to simulate carbon, nutrient, water, and energy fluxes for forest ecosystems (e.g., Running and Coughlan 1988), techniques to rapidly estimate LAI over large areas are in great demand ...
Godelieve Deblonde +2 more
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Validation of MODIS and GEOV2 Leaf Area Index (LAI) Products over Croplands in Northeastern China
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019The objective of this study is to validate the recent moderate resolution leaf area index (LAI) products generated by MODIS collection 6 (C6) and Geoland2/BioPar project (GEOV2) over major agricultural croplands. Field campaigns were conducted and seasonal continuous LAI measurements were obtained over rice, maize, soybean, and sorghum fields in the ...
Hongliang Fang +6 more
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Sentinel 1 response to cereal leaf area index (LAI): Study case for central Tunisia
2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016Leaf area index (LAI) is very used to reveal the vegetation situation. To estimate the LAI for cereal, both direct and indirect methods have been used. In particular, remote sensing is a fast and reliable technique to develop the LAI estimation models.
Meriem Barbouchi +4 more
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