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Indirect Estimation of Leaf Area Index in VSP-Trained Grapevines Using Plant Area Index
American Journal of Enology and Viticulture, 2013Leaf area index (LAI) and canopy structure are important parameters affecting grape quality and yield of grapevines. Two different experimental protocols as well as the average LAI value of the different protocols for indirect estimation of LAI by gap fraction analysis in VSP-trained grapevines (Vitis vinifera L. cv. Riesling) were tested in this study
Doering +4 more
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Leaf area index mapping in northern Canada
International Journal of Remote Sensing, 2011In this study, a new LAI algorithm was developed with particular emphasis over northern Canada using a much finer resolution of remotely sensed data and in situ measurements collected over a wide range of northern arctic vegetation. A statistical relationship was developed between the in situ LAI measurements collected over vegetation plots in northern
Abdelgadir A. Abuelgasim +1 more
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Specific leaf area and leaf area index distribution in a young Douglas-fir plantation
Canadian Journal of Forest Research, 1986The spatial distribution of specific leaf area and leaf area index of needles in different age classes has been investigated in a young and unthinned Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) plantation in Central Italy through the destructive analysis of 12 trees sampled in four diameter size classes.
BORGHETTI, Marco +2 more
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Vegetative Development: Total Leaf Area and Surface Area Indexes
2010Canopy management determines canopy shape and spatial leaf area distribution which in turn determines vineyard productivity. There are two indexes evaluating vineyard productivity which involve leaf development: total leaf area – LAI – and external leaf area – SA –. The first one refers to total leaf area developed per m2 of soil while SA refers to the
Patricia Sánchez-de-Miguel +3 more
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Vegetation index response to leaf area index and fractional vegetated area over cotton
IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120), 2002In an agricultural setting vegetation indices should accurately track the state of crop growth under conditions in which the radiometer field of view includes both active vegetative, senesced, and non-vegetative components. Ideally, they should also do so regardless of variation in viewing and background conditions.
S.A. Mauget, D.R. Upchurch
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Journal of Applied Remote Sensing, 2012
Leaf area index (LAI) is a key parameter in most land surface models. Models that operate at multiple spatial scales may require consistent LAI inputs at different spatial resolutions or from different sensors. For example, the atmosphere-land exchange inverse model and associated disaggregation algorithm (DisALEXI) use the moderate resolution imaging ...
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Leaf area index (LAI) is a key parameter in most land surface models. Models that operate at multiple spatial scales may require consistent LAI inputs at different spatial resolutions or from different sensors. For example, the atmosphere-land exchange inverse model and associated disaggregation algorithm (DisALEXI) use the moderate resolution imaging ...
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Prediction of leaf area index in almonds by vegetation indexes
Computers and Electronics in Agriculture, 2012Three levels of scale for determining leaf area index (LAI) were explored within an almond orchard of alternating rows of Nonpareil and Monterey varieties using hemispherical photography and mule lightbar (MLB) at ground level up to airborne and satellite imagery.
Jose L. Zarate-Valdez +5 more
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Leaf spot area index: A nondestructive mangrove leaf spot estimation technique
2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES), 2015Mangrove forests in the United Arab Emirates and the rest of the world hold a vital importance to the environment. For example, the Environmental Agency of Abu Dhabi has several programs in place for the preservation and protection of these forests due to their importance as breeding grounds for several sea species as well as the role they plan in ...
Mohammed Ghazal, Hassan Hajjdiab
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Estimating leaf area index from satellite data
IEEE Transactions on Geoscience and Remote Sensing, 1993A method for estimating leaf area index from visible and near infrared measurements of vegetation above a soil background is applied to a Landsat Thematic Mapper data set. Some constants required for the procedure are inferred from the scattergram of data values.
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