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Showing 1 to 20 of 443 for “"LAI"”.
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TOPICS IN HAKHA LAI NOMINAL MARKING
… complex functions. This work investigates Hakha Lai, a South Central (formerly Kuki-Chin) Tibeto-Burman language spoken in Chin state in Burma and in diaspora communities worldwide. Hakha Lai discourse deictics are derived from the spatial deictic markers of the demonstrative paradigm, where they …
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Uncovered : the cover-up of the My Lai massacre.
… soldiers on March 16, 1968, in the hamlet of My Lai. The United States Army conducted its own investigation of the events within days. American troops, ranging from privates up through corporals and captains, knew of the event and what had occurred. For nearly a year the events were kept secret …
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Characterizing spatiotemporal variation in LAI of Virginia Pine Plantations
… and empirical relationships predicting pine LAI from the Landsat satellite, we conducted a statewide analysis of temporal patterns in stand-level southern pine leaf area index (LAI) following clear-cut and planting. Here, using 28 years of Landsat time-series data for 13,140 stands that were …
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Validating Leaf Area Index (LAI) and canopy cover estimated from satellite imagery products with ground measurements in plum orchards, Western Cape
… accurate estimation of the Leaf Area Index (LAI) plays a central role in linking canopy structure to productivity. LAI is not only a key indicator of crop development and yield potential but also a critical input in biophysical and climatic models. However, direct measurement of LAI remains …
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Assessment of Soybean Leaf Area for Redefining Management Strategies for Leaf-Feeding Insects
Commercially available leaf area index (LAI) meters are tools that can be used in making insect management decisions. However, proper technique must be determined for LAI estimation, and accuracy must be validated for the meters. Full-season soybean require LAI values of at least 3.5 to 4.0 by …
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Assessing the accuracy of the MODIS LAI 1-km product in southeastern United States loblolly pine plantations: Accounting for measurement variance from ground to satellite
<p>Leaf area index (LAI), defined here as one-half of the total leaf area per unit ground surface area (Chen, 1996), has been estimated at a global scale from spectral data processed from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor aboard two NASA EOS-AM spacecraft, Terra …
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Determination and Manipulation of Leaf Area Index to Facilitate Site-Specific Management of Double-Crop Soybean in the Mid-Atlantic, U.S.A.
… common to the Mid-Atlantic USA. Leaf area index (LAI) is the ratio of unit leaf area of a crop to unit ground area and is a reliable indicator of leaf area development and crop biomass. An LAI of 3.5 to 4.0 by flowering is required to maximize yield potential. Soybean LAI will vary within and …
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Stand Strucuture of Planted Stands in Storm-Water Retention Basins
… coverage) as they relate to leaf area index (LAI) and stand age. Simple linear regressions were used to determine relationships for: structure variables with LAI, structure variables with age, hemispheric canopy photography/LI-COR LAI-2200c measurements, and dormant/growing season LAI. …
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Improved leaf area index estimation by considering both temporal and spatial variations
Variations in Leaf Area Index (LAI) can greatly alter output values and patterns of various models that deal with energy flux exchange between the land surface and the atmosphere. Customarily, such models are initiated by LAI estimated from satellite-level Vegetation Indices (VIs) including …
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Understanding Liquid-Air Interface Corrosion of Steel in Simplified Liquid Nuclear Waste Solutions
… is susceptible to the liquid-air interface (LAI) corrosion in liquid nuclear waste and in simulants, but a precise understanding of the mechanism is still missing. This work aimed to expand the understanding of the LAI corrosion mechanism.LAI corrosion was found to initiate at the very top of …
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Influence of Several Herbicides on Visual Injury, Leaf Area Index, and Yield of Glyphosate-Tolerant Soybean <I>(Glycine max)</I>
… treatment on soybean injury, leaf area index (LAI), and yield. Three glyphosate-tolerant soybean cultivars representing maturity groups III, IV and V were planted at dates representing the full-season and double-crop soybean production systems used in Virginia. Within each cultivar and planting …
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Assessment of a methodology for determination of H[2]O[2] concentration and pH in exhaled breath condensate in horses with and without lower airway inflammation
… the investigation of lower airway inflammation (LAI) is available for horses. Aims of the current study were to develop a device to collect EBC from non-sedated horses, assess inter-day and intra-day variability of EBC H2O2 concentration and pH and determine if there was an association between …
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Estimating forest attributes using laser scanning data and dual-band, single-pass interferometric aperture radar to improve forest management
… were to (1) determine whether leaf area index (LAI) (Chapter 2), as well as stem density and height to live crown (Chapter 3) can be estimated accurately in intensively managed pine plantations using small-footprint, multiple-return airborne laser scanner (lidar) data, and (2) ascertain whether …
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Direct and Indirect Effects of Elevated Carbon Dioxide and Ozone on the Canopy of a Soybean Agroecosystem
… ecosystems. I determined how leaf area index (LAI) was directly affected by elevated [CO 2] and [O3]. By increasing photosynthetic efficiency, elevated [CO2] may increase maximum LAI. However, [O3] accelerates senescence and may reduce LAI. My second objective was to determine how changes in …
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Growth analysis and regrowth potential of three cool season grasses in spring
… with the CGR. There were differences in total LAI among grasses when averaging the weekly cuts. The regrowth in the field after harvesting at different dates was found to be influenced by variation in temperature, LAI and soluble carbohydrates in the stubble, and change in the morphology of the …
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QUANTIFYING THE DISTRIBUTION OF FOREST FUNCTIONAL TYPES AND FOREST LEAF AREA INDEX IN THE ALPS
… gain) of alpine forests is Leaf Area Index (LAI). Remote sensing provides a means to estimate LAI over large areas. To map LAI in mountain regions, Landsat TM NDVI index and SR index were examined together with forest inventory data of the Berchtesgaden National Park. “Ground truth” point …
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The discrete wavelet transform as a precursor to leaf area index estimation and species classification using airborne hyperspectral data
… (Pinus spp.), (2) estimation of leaf area index (LAI) using an empirically-based model, and (3) estimation of LAI using a physically-based model. For pine species classification, different sets of Haar wavelet features were compared to each other and to calibrated radiance. The Haar coefficients …
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Post-wildfire black carbon deposition on the snowpack in the Cascade Range, Washington State: Temporal and spatial variability with implications for accelerated melt
… and depositing light absorbing impurities (LAI) on the snowpack. LAI such as black carbon (BC), burned woody debris, and dust reduce snow albedo (reflectance), accelerate melt, and affect the timing and availability of water resources. Charred trees in post-wildfire forests provide a …
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Leaf area index, light penetration, and carbohydrate reserves during growth of Kentucky 31 tall fescue (Festuca arundinacea Schreb.)
… between dry matter production, leaf area index (LAI), light penetration through the canopy and carbohydrate reserve fluctuations during regrowth under different growth stages and cutting managements of Kentucky 31 tall fescue were studied in three field experiments during spring and summer. …
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