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Tesi sul tema "Leaf area index"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Ebodaghe, Denis Abumere. "Estimating daily green leaf area index for corn in Virginia." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/74731.

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A model to predict the daily green leaf area index (GLAI) for corn has been developed for Indiana conditions. Using daily maximum and minimum temperatures the GLAI was predicted for the vegetative stage, reproductive and grain filling stage, and the leaf senescing stage of corn. Predictions of GLAI for corn can be made on a daily basis from the day corn is planted until it is harvested for grain. The GLAI model was tested under Virginia conditions using green leaf area measurements collected from corn plants grown on Davidson silty clay loam, Davidson silty clay, and Mayodan sandy loam soils

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2

Malone, Sean M. "Assessment of Soybean Leaf Area for Redefining Management Strategies for Leaf-Feeding Insects." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/29252.

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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 early to mid-reproductive developmental stages to achieve maximum yield potential, but the relationship between double-crop soybean LAI and yield is unknown. This research (1) evaluated minimum plot size requirements for mechanically defoliated soybean experiments using the LAI-2000 Plant Canopy Analy

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3

Coker, Graham William Russell. "Leaf Area Index in Closed Canopies: An indicator of site quality." Thesis, University of Canterbury. School of Forestry, 2006. http://hdl.handle.net/10092/1128.

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This study examined leaf area index (LAI) and relationships with corresponding tree growth, climate and soil characteristics across New Zealand forest plantations. The aim of this study was to determine if quick measures of projected leaf area across environmental gradients of New Zealand were an accurate indicator of site quality. Projected leaf areas of Pinus radiata D Don and Cupressus lusitanica Mills seedlings were measured using a Li-Cor LAI-2000 plant canopy analyser at 22 locations representing the soil and climatic diversity across New Zealand plantation forests. Seedlings planted at

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4

Wang, Dongdong. "Improving satellite Leaf Area Index estimation based on various integration methods." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9872.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept. of Geography. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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5

Johnson, Ryan L. "Airborne remote sensing of forest leaf area index in mountainous terrain." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ49131.pdf.

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6

Johnson, Ryan L., and University of Lethbridge Faculty of Arts and Science. "Airborne remote sensing of forest leaf area index in mountainous terrain." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2000, 2000. http://hdl.handle.net/10133/90.

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Leaf area index (LAI) provides forestry information that is important for regional scale ecological models and in studies of global change. This research examines the effects of mountainous terrain on the radiometric properties of multispectral CASI imagery in estimating ground-based optical measurements of LAI, obtained using the TRAC and LAI- 2000 systems. Field and image data were acquired summer 1998 in Kananaskis, Alberta, Canada. To account for the influence of terrain a new modified approach using the Li and Strahler Geometric Optical Mutual Shadowing (GOMS) model in 'multiple forward

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7

Fang, Hongliang. "Improving the estimation of leaf area index from multispectral remotely sensed data." College Park, Md. : University of Maryland, 2003. http://hdl.handle.net/1903/304.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2003.<br>Thesis research directed by: Geography. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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8

Bowyer, P. "Estimating leaf area index in savanna vegetation using remote sensing and inverse modelling." Thesis, University of Salford, 2005. http://usir.salford.ac.uk/2234/.

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Leaf area index (LAI), defined as the one sided green leaf area per unit ground area, is a key parameter in ecosystem process models. Owing to the large area of the earth's surface that they occupy, savanna ecosystems represent the third largest terrestrial carbon sink. There is considerable uncertainty however, as to the functioning of these ecosystems, particularly as they respond to land cover changes. Consequently, ecosystem process models constitute one of the best methods available for investigating the effect this may have on terrestrial carbon cycling. If these models are to be used ov

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9

May, David Z. "A MULTISPECTRAL REMOTE SENSING INVESTIGATION OF LEAF AREA INDEX AT BLACK ROCK FOREST, NY." Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1157569101.

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10

Hirooka, Yoshihiro. "Evaluation of Rice Growth Characteristics Based on Non-destructive Measurements of Leaf Area Index." Kyoto University, 2016. http://hdl.handle.net/2433/215581.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第19755号<br>農博第2151号<br>新制||農||1038(附属図書館)<br>学位論文||H28||N4971(農学部図書室)<br>32791<br>京都大学大学院農学研究科農学専攻<br>(主査)教授白岩立彦, 教授奥本裕, 教授稲村達也<br>学位規則第4条第1項該当

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11

McCurdy, Wyatt Conner. "Characterizing spatiotemporal variation in LAI of Virginia Pine Plantations." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/96595.

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Loblolly pine is an important managed tree species within the southeastern United States, and better understanding spatial patterns in its productivity has potential to contribute to both modeling and management of the species. Using recently-created pine management maps specific to Virginia 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 clear-cut betw

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12

Bobeva, Albena. "Quantifying the distribution of forest functional types and forest leaf area index in the Alps." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969685106.

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13

Shah, Kushendra Narayan. "MULTI-SCALE MAPPING AND ACCURACY ASSESSMENT OF LEAF AREA INDEX FOR VEGETATION STUDY IN SOUTHERN ILLINOIS." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1234.

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The increasing interest of modeling global carbon cycling during the past two decades has driven this research to map leaf area index (LAI) at multiple spatial resolutions by combining LAI field observations with various sensor images at local, regional, and global scale. This is due to its important role in process based models that are used to predict carbon sequestration of terrestrial ecosystems. Although a substantial research has been conducted, there are still many challenges in this area. One of the challenges is that various images with spatial resolutions varying from few meters to s

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14

DeRose, Robert Justin. "Leaf Area Index - Relative Density Relationships in Even-Aged Abies Balsamea - Picea Rubens Stands in Maine." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/DeRoseRJ2004.pdf.

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15

Meek, David B. "The Relationship Between Leaf Area Index and Photosynthetic Temperature Response in Wheat (Triticum aestivum L.) Canopies." DigitalCommons@USU, 1990. https://digitalcommons.usu.edu/etd/6764.

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The objective of this study was to determine the effect of increasing leaf area index on the photosynthetic temperature response of a wheat canopy. Hard red spring wheat (Triticum aestivum L. cv. Veery-10) was grown hydroponically in a growth chamber, which also served as the gas-exchange chamber. Gas-exchange parameters were measured on single leaves and on wheat canopies at various leaf area indices. The temperature response curves of the canopy shifted from being steeper with a high temperature optimum to being flatter with a lower temperature optimum as leaf area index increased from 0 to

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16

Hancock, Dennis Wayne. "SPECTRAL REFLECTANCE OF CANOPIES OF RAINFED AND SUBSURFACE IRRIGATED ALFALFA." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_diss/332.

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The site-specific management of alfalfa has not been well-evaluated, despite the economic importance of this crop. The objectives of this work were to i) characterize the effects of soil moisture deficits on alfalfa and alfalfa yield components and ii) evaluate the use of canopy reflectance patterns in measuring treatment-induced differences in alfalfa yield. A randomized complete block design with five replicates of subsurface drip irrigation (SDI) and rainfed treatments of alfalfa was established at the University of Kentucky Animal Research Center in 2003. Potassium, as KCl, was broadcast o

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17

Aqeel, Abdullah Mohammad. "USING MANUAL DEFOLIATION TO SIMULATE SOYBEAN RUST: EFFECT ON GROWTH AND YIELD FORMATION." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/223.

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Field experiments were conducted in Kentucky and Louisiana in 2008 and 2009 (split-plot in a randomized complete block design with four replications) to investigate it is possible to simulate with manual defoliation the effect of soybean rust (SBR) (Phakopsora pachyrhizi Syd. and P. Syd) injury on a healthy soybean [Glycine max, (L.) Merr.] canopy, understand how defoliation affects the growth dynamics and canopy light interception, and if defoliation affectsleaf senescence and nitrogen remobilization during the seed-filling period. Two manual defoliation treatments based on changes in effecti

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18

Pacheco, Anna. "Contribution of hyperspectral remote sensing to the estimation of leaf area index in the context of precision agriculture." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26734.

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The estimation of Leaf Area Index (LAI) is a key parameter controlling biophysical processes of the vegetation canopy, and ultimately yield. Defined as one half the total green leaf area per unit ground surface area, LAI is an essential component of precision crop management. Direct field techniques are tedious, time-consuming and labour-intensive. Indirect techniques, such as determining gap fraction with optical instruments have proven to be a good alternative, but their use is limited to rigid field sampling techniques. Vegetation indices have been useful to estimate LAI but are limited mos

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19

Davidson, Diedre P., and University of Lethbridge Faculty of Arts and Science. "Sensitivity of ecosystem net primary productivity models to remotely sensed leaf area index in a montane forest environment." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2002, 2002. http://hdl.handle.net/10133/155.

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Net primary productivity (NPP) is a key ecological parameter that is important in estimating carbon stocks in large forested areas. NPP is estimated using models of which leaf area index (LAI) is a key input. This research computes a variety of ground-based and remote sensing LAI estimation approaches and examines the impact of these estimates on modeled NPP. A relative comparison of ground-based LAI estimates from optical and allometric techniques showed that the integrated LAI-2000 and TRAC method was preferred. Spectral mixture analysis (SMA), accounting for subpixel influences on reflectan

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20

Banskota, Asim. "The discrete wavelet transform as a precursor to leaf area index estimation and species classification using airborne hyperspectral data." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/39188.

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The need for an efficient dimensionality reduction technique has remained a critical challenge for effective analysis of hyperspectral data for vegetation applications. Discrete wavelet transform (DWT), through multiresolution analysis, offers oppurtunities both to reduce dimension and convey information at multiple spectral scales. In this study, we investigated the utility of the Haar DWT for AVIRIS hyperspectral data analysis in three different applications (1) classification of three pine species (Pinus spp.), (2) estimation of leaf area index (LAI) using an empirically-based model, and (3

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21

Jones, Brian Paul. "Determination and Manipulation of Leaf Area Index to Facilitate Site-Specific Management of Double-Crop Soybean in the Mid-Atlantic, U.S.A." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/31566.

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Double cropping soybean after small grain harvest does not always allow sufficient canopy growth to maximize photosynthesis and seed yield. This is due to a shorter growing season and moisture deficits 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 between fields due to soil differences, cultivar selection, and other cultural practices. Site-spec

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22

Braun, Marko. "The Segmentation of Reflectances from Moderate Resolution Remote Sensing Data for the Retrieval of Land Cover Specific Leaf Area Index." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-75863.

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23

Kandasamy, Sivasathivel. "Leaf Area Index (LAI) monitoring at global scale : improved definition, continuity and consistency of LAI estimates from kilometric satellite observations." Phd thesis, Université d'Avignon, 2013. http://tel.archives-ouvertes.fr/tel-00967319.

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Monitoring biophysical variables at a global scale over long time periods is vital to address the climatechange and food security challenges. Leaf Area Index (LAI) is a structure variable giving a measure of the canopysurface for radiation interception and canopy-atmosphere interactions. LAI is an important variable in manyecosystem models and it has been recognized as an Essential Climate Variable. This thesis aims to provide globaland continuous estimates of LAI from satellite observations in near-real time according to user requirements to beused for diagnostic and prognostic evaluations of

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24

Johnson, Bryan Fisher. "Influence of Several Herbicides on Visual Injury, Leaf Area Index, and Yield of Glyphosate-Tolerant Soybean (Glycine max)." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32295.

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The occasional failure of glyphosate to control all weeds throughout the entire growing season has prompted growers to sometimes use herbicides other than glyphosate on glyphosate-tolerant soybean. Field studies were conducted in 1999 and 2000 to investigate potential crop injury from several herbicides on glyphosate-tolerant soybean, and to determine the relationship between soybean maturity, planting date, and herbicide 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

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25

Souza, Vanessa de Arruda. "Utilização de técnicas de sensoriamento remoto para a estimativa da evapotranspiração em uma cultura de arroz irrigado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/72454.

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A evapotranspiração (ET) é um fenômeno natural que influencia diretamente mudanças no clima local e global, possuindo grande importância hidrológica e meteorológica. Este trabalho teve como objetivo estimar a ET através do método Penman-Monteith, e comparar com os resultados estimados pelo Método da Covariância de Vórtices Turbulentos. Os dados de IAF (Índice de Área Foliar) para descrição da vegetação foram obtidos a partir do sensor MODIS e de medições em campo da Rede SulFlux. A área de estudo desta pesquisa localizou-se no município de Cachoeira do Sul-RS, em uma propriedade de cultivo de

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26

Chiang, Yang-Sheng. "Estimating landscape level leaf area index and net primary productivity using field measurements, satellite imagery, and a 2-D ecophysiological model." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1294241.

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This study has provided a landscape level estimate of leaf area index (LAI) and net primary productivity (NPP) for a temperate broadleaf forest ecosystem in south-central Indiana. The estimates were compared with the Moderate Resolution Imaging Spectroradiometer (MODIS) biophysical products LAI and NPP from both spatial and temporal perspectives. The evidence suggests that field-based estimates were poorly correlated with global MODIS data due to the simplifying assumptions of the MODIS global applicability, saturation problems of the red reflectance in highly vegetated areas, homogeneous land

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27

Hausler, Melanie. "Assessment of vegetation parameters in olive trees in the region of Alentejo. A comparison of direct and indirect methods." Master's thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/4004.

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Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia<br>Vegetation parameters, as the leaf area index (LAI) and the ground cover (GC) are commonly related to biosphere processes, being used in models to estimate yield and crop water requirements. Several direct and indirect methods have been developed in the past decades to determine the LAI. However, a simple approach to assess this parameter is still missing. In this study we tested the operability and precision of different methods to calculate the LAI of 6 and 20 year old olive trees (Arbequina and Cobrançosa), under irrigat

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28

Ilangakoon, Nayani Thanuja. "Relationship between leaf area index (LAI) estimated by terrestrial LiDAR and remotely sensed vegetation indices as a proxy to forest carbon sequestration." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1402857524.

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Hawthorne, Iain. "Eddy-covariance carbon balance, photosynthetic capacity and vegetation indices in a harvested boreal jack pine stand." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2757.

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Eddy-covariance (EC) CO₂ flux data were analysed and annual carbon (C) balances estimated for a four-year period (2004-2007) following clearcut harvesting of a boreal jack pine stand in northern Saskatchewan. The site was a source of C to the atmosphere for all years, with annual net ecosystem productivity (NEP) increasing from -153 g C m⁻² yr⁻¹ in 2004 to -63 g C m⁻² yr⁻¹ in 2007. This increase was mainly due to gross primary productivity (GPP) increasing significantly from 78 to 200 g C m⁻² yr⁻¹ , while ecosystem respiration (R) increased only slightly from 231 to 263 g C m⁻² yr⁻¹ over th

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Lima, Julianne Oliveira Sbeghen. "Aplicação de quatro métodos indiretos na medição de densidade de dossel em fragmento de mata nativa, recuperada e floresta de Eucalyptus urophylla (S.T. Blake)." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-25042017-151359/.

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A cobertura de dossel em uma floresta controla a quantidade, a qualidade e a distribuição da incidência de radiação solar, o que vem a refletir em diferentes níveis de umidade do solo, promovendo a interceptação das chuvas, consequentemente, reduzindo o seu impacto do solo. Além disso, a estrutura vegetal e a densidade do dossel condicionam não apenas o regime de radiação, mas também as trocas de energias e gases entre floresta e atmosfera. Este trabalho teve como objetivo comparar o uso do densiômetro, densitômetro, quadro reticulado e fotografias hemisféricas na obtenção da densidade do doss

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Peduzzi, Alicia. "Estimating forest attributes using laser scanning data and dual-band, single-pass interferometric aperture radar to improve forest management." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/39456.

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The overall objectives of this dissertation 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 leaf area index in temperate mixed forests is best estimated using multiple-return airborne laser scanning (lidar) data or dual-band, single-pass interferometric synthetic aperture radar data (from GeoSAR) alone or both in combination (Chapter 4). In situ meas

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Ding, Deng. "An integrated modeling framework of socio-economic, biophysical, and hydrological processes in Midwest landscapes: remote sensing data, agro-hydrological model, and agent-based model." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/1840.

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Intensive human-environment interactions are taking place in Midwestern agricultural systems. An integrated modeling framework is suitable for predicting dynamics of key variables of the socio-economic, biophysical, hydrological processes as well as exploring the potential transitions of system states in response to changes of the driving factors. The purpose of this dissertation is to address issues concerning the interacting processes and consequent changes in land use, water balance, and water quality using an integrated modeling framework. This dissertation is composed of three studies in

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Brantley, Steven T. "Seasonal and Spatial Variation in Leaf Area Index, Litter Production, and Light Levels in Myrica Cerifera,Shrub Thickets Across a Barrier Island Chronsequence." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1507.

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Leaf area index (LAI), litter production and understory light levels of Myrica cergera shrub thickets were assessed on Hog Island, Virginia to quantify spatial and seasonal variations in leaf area and light attenuation among four thickets representing a successional chronosequence and compare methods of estimating LA1 in shrub- dominated systems. Seasonal LA1 estimates were made seven times throughout the year with a portable integrating radiometer (Li-Cor LAI-2000) and three times by measurement of photosynthetically active radiation (PAR) and use of the Beer-Larnbert law. Leaf area index was

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Asam, Sarah [Verfasser], Stefan [Gutachter] Dech, and Harald [Gutachter] Kunstmann. "Potential of high resolution remote sensing data for leaf area index derivation using statistical and physical models / Sarah Asam. Gutachter: Stefan Dech ; Harald Kunstmann." Würzburg : Universität Würzburg, 2015. http://d-nb.info/1111636680/34.

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Uehara, Luciana Yukari. "Inflluência do microrrelevo em caracteres foliares de espécies do sobosque de Floresta Ombrofila Densa Submontana, no Núcleo Piciguaba, Ubatuba." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315566.

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Orientador: Sandra Maria Carmello-Guerreiro, Fernando Roberto Martins<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-17T07:29:42Z (GMT). No. of bitstreams: 1 Uehara_LucianaYukari_M.pdf: 4862542 bytes, checksum: ad70cd04421ec86d5f001965c62d9a94 (MD5) Previous issue date: 2010<br>Resumo: Características morfológicas e anatômicas da folha de espécies vegetais são importantes indicadores de sua ecologia e dos habitats que ocupam. A variação das características anatômicas das folhas relacionadas às diferentes condições a

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Gaiewski, Vicente. "Parametrização do modelo LINTUL para estimar a produtividade potencial da cultura de milho." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-10112009-152845/.

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Com o objetivo de parametrizar o modelo LINTUL (Light Interception and Utilization - Interceptação e Utilização da Luz) foi conduzido um experimento de campo, na safra 2003/2004, em Piracicaba-SP, na área experimental do Departamento de Produção Vegetal (Esalq) da Universidade de São Paulo, utilizando o procedimento de análise de crescimento. Ao longo do ciclo da cultura, foram efetuadas 24 amostragens, com 4 repetições, para determinação da massa de matéria seca de raiz, colmo, folha e órgão reprodutivo. Em função dos resultados obtidos referentes à parametrização do modelo LINTUL com base na

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Jaboinski, Fernando Roberto. "Avaliação de produtos do sensor MODIS para aplicações na estimativa de parâmetros biofísicos da cultura da soja no estado do Rio Grande do Sul." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/36964.

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Estimativas do rendimento da soja são informações importantes que podem auxiliar as instituições na tomada de decisão quanto à políticas de comercialização. São consideradas também, na liberação de recursos para o financiamento da produção e seguro agrícola. Modelos matemáticos, que se baseiam nas relações clima planta, denominados modelos agrometeorológicos, podem estimar o rendimento médio de grãos, através de dados meteorológicos e biofísicos da cultura, como exemplo: o IAF (Índice de área foliar) da soja pode ser associado ao Kc (Coeficiente de cultura) para estimar o estádio fenológico, e

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Flores, Karen Stephanny Cordova. "Estudo das respostas ecofisiológicas no crescimento de clones Eucalyptus spp. submetidos a variações de níveis de restrições hídricas em distintas condições edáficas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-28032016-121014/.

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A alta demanda por madeira de eucalipto para diversas finalidades traz a necessidade da expansão de plantios para áreas em condições de déficit hídrico, o que leva o interesse de entender os processos fisiológicos relacionados ao crescimento da árvore, para possibilitar uma alta produtividade das florestas nessas áreas. Com base nessas informações, o objetivo deste trabalho foi avaliar o efeito da variação de níveis de restrições hídricas em clones de Eucalyptus spp. plantados em diferentes condições edáficas, pelo estudo das respostas ecofisiológicas, para isso foram instalados em janeiro 201

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39

LaJeunesse, Katherine J. "Covariation in plant abundance and diversity estimators in an old field herbaceous plant community." Miami University Honors Theses / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=muhonors1177560873.

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40

Gonsalves, Marcus Vinicius Irano [UNESP]. "Doses de N e K aplicadas via fertirrigação e espaçamento entre plantas influenciando o desenvolvimento, a produtividade e as relações hídricas em melancieira com e sem sementes." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/88216.

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Made available in DSpace on 2014-06-11T19:23:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-10-14Bitstream added on 2014-06-13T18:09:27Z : No. of bitstreams: 1 gonsalves_mvi_me_jabo.pdf: 689037 bytes, checksum: 058c47573833b69b7eb15e04313f24be (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>A melancieira é cultivada praticamente em todo o território brasileiro, atingindo produção média anual no período de 1999/2006 de 1826134,5 t em área média anual de 81891,8 ha no mesmo período. A pr

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41

Soma, Maxime. "Estimation de la distribution spatiale de surface et de biomasse foliaires de couverts forestiers méditerranéens à partir de nuages de points acquis par un LIDAR terrestre." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0111.

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Pour mieux comprendre le fonctionnement des écosystèmes forestiers à échelle fine, les modèles écophysiologiques cherchent à intégrer les flux d’énergie et de matière. Ces échanges dépendent de la distribution de la végétation. Leur modélisation nécessite donc une description de la structure de la végétation en trois dimensions (3D) à un niveau de détail que seule la télédétection peut produire à haut débit. Les LiDAR terrestre (Light Detection And Ranging) possèdent un fort potentiel pour caractériser en 3D la végétation au sein des canopées. De précédents travaux qui relient la densité de po

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42

Solontsi, Mhlangabezi. "The response of maize to selected ratios of organic fertilizers mixed with inorganic fertilizers in Ndlambe Local Municipality, Eastern Cape, South Africa." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020902.

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The majority of small-scale farmers in the Eastern Cape apply inadequate quantities of manure, inorganic (NPK) fertilizer and Gromor as lone fertilizers or tend to mix manure or Gromor with chemical fertilizers for crops, without any scientific basis (Mkile, 2001). Hence this study – aimed at achieving effective and efficient use of chemical fertilizers, manure and Gromor, either as lone fertilizers or mixed with one another, in maize production – was established. A three-year dry land field experiment, arranged in a RCBD with 3 replicates where cattle manure, chemical fertilizer and Gromor we

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43

Gonsalves, Marcus Vinicius Irano. "Doses de N e K aplicadas via fertirrigação e espaçamento entre plantas influenciando o desenvolvimento, a produtividade e as relações hídricas em melancieira com e sem sementes /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/88216.

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Resumo: A melancieira é cultivada praticamente em todo o território brasileiro, atingindo produção média anual no período de 1999/2006 de 1826134,5 t em área média anual de 81891,8 ha no mesmo período. A produção e qualidade dos frutos de melancia estão associadas a fatores genéticos, climáticos e fitotécnicos, sendo a nutrição da planta de fundamental importância para conseguir resultados satisfatórios. O nitrogênio e o potássio são os nutrientes extraídos em maior quantidade pela melancia e devem ser aplicados de forma e quantidade adequada e na época correta. Outro fator de grande importânc

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44

Imran, Hafiz Ali. "Remote Sensing Tools for Monitoring Grassland Plant Leaf Traits and Biodiversity." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/329592.

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Grasslands are one of the most important ecosystems on Earth, covering approximately one-third of the Earth’s surface. Grassland biodiversity is important as many services provided by such ecosystems are crucial for the human economy and well-being. Given the importance of grasslands ecosystems, in recent years research has been carried out on the potential to monitor them with novel remote sensing techniques. Improved detectors technology and novel sensors providing fine-scale hyperspectral imagery have been enabling new methods to monitor plant traits (PTs) and biodiversity. The aims of the

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45

Gomes, Ellen da Costa. "Estrutura e produÃÃo do capim-tifton 85 sob duas intensidades e duas frequÃncias de desfolhaÃÃo com ovinos." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16329.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>O processo de desfolhaÃÃo, composto pela intensidade e frequÃncia, interfere nos padrÃes de crescimento, nas caracterÃsticas estruturais e produtivas das plantas forrageiras. O conhecimento dessas respostas Ã essencial para a utilizaÃÃo da planta forrageira em pastagens. Esse estudo foi conduzido com o objetivo de avaliar as caracterÃsticas estruturais e produtivas em capim-tifton 85 sob efeitos de duas frequÃncias e duas intensidades de desfolhaÃÃo, manejado sob lotaÃÃo rotativa com ovinos. O experimento foi conduzido no NÃcleo

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46

Santos, Nailson Lima. "Avaliação do Capim-tanzânia manejado com diferentes IAF residuais sob lotação rotacionada por cabras Boer X Saanen /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/96575.

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Resumo: Avaliou-se o efeito do IAF residual sob a estrutura do pasto de capim-Tanzânia e o comportamento ingestivo de cabras Boer X Saanen sob lotação intermitente. O experimento foi conduzido no período de fevereiro/2008 a agosto/2008. A área foi subdividida em 18 piquetes de 243 m2 para o estudo de 3 tratamentos dispostos segundo um delineamento em blocos casualizados com 6 repetições para avaliações referentes à gramínea. As avaliações referentes ao comportamento ingestivo das cabras foram realizadas, na mesma área, em 12 piquetes, alocados em blocos casualizados, com 4 repetições. Os trata

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47

Hofmann, Gabriel Selbach. "Relações entre a temperatura do ar e a estrutura de formações vegetais no norte do Pantanal de Mato Grosso." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/15817.

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A relação entre o microclima e a vegetação tem sido explorada sob os mais variados pontos de vista. Raros são os trabalhos deste tipo, que consideram mais de um tipo de floresta, e em situação natural. Este trabalho avalia de forma detalhada a temperatura do ar, e sua relação com a estrutura da vegetação da maior Unidade de Conservação particular do País, a RPPN SESC Pantanal. Esta Unidade de Conservação se localiza em uma área continental tropical de grande importância para a conservação biológica, o Pantanal de Mato Grosso no centro-oeste do Brasil. Foi mensurada a estrutura de cinco formaçõ

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48

Oliveira, Ana Paula Pessim de. "Crescimento e composi??o qu?mico-bromatol?gica do capim Tifton 85 (Cynodon spp) sob doses de nitrog?nio." Universidade Federal Rural do Rio de Janeiro, 2008. https://tede.ufrrj.br/jspui/handle/tede/579.

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Made available in DSpace on 2016-04-28T14:59:45Z (GMT). No. of bitstreams: 1 2008 - Ana Paula Pessim de Oliveira.pdf: 1134139 bytes, checksum: e35252b70432f1b09c9e114425df2810 (MD5) Previous issue date: 2008-07-11<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The effects of nitrogen (N) application on several structural and nutritional attributes of the plant canopy were evaluated. The studies were carried out at the Experimental Campus of the Rio de Janeiro Federal Rural University, Serop?dica-RJ, in area of Planosol Haplic occurrence, during the period of October 2006 t

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49

Klisch, Anja. "Ableitung von Blattflächenindex und Bedeckungsgrad aus Fernerkundungsdaten für das Erosionsmodell EROSION 3D." Phd thesis, Universität Potsdam, 2003. http://opus.kobv.de/ubp/volltexte/2005/104/.

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In den letzten Jahren wurden relativ komplexe Erosionsmodelle entwickelt, deren Teilprozesse immer mehr auf physikalisch begründeten Ansätzen beruhen. Damit verbunden ist eine höhere Anzahl aktueller Eingangsparameter, deren Bestimmung im Feld arbeits- und kostenaufwendig ist. Zudem werden die Parameter punktuell, also an bestimmten Stellen und nicht flächenhaft wie bei der Fernerkundung, erfasst. <br /> <br /> Im Rahmen dieser Arbeit wird gezeigt, wie Satellitendaten als relativ kostengünstige Ergänzung oder Alternative zur konventionellen Parametererhebung genutzt werden können. Dazu werden

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50

Mazumdar, Deepayan Dutta. "Multiangular crop differentiation and LAI estimation using PROSAIL model inversion." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, c2011, 2011. http://hdl.handle.net/10133/3103.

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Understanding variations in remote sensing data with illumination and sensor angle changes is important in agricultural crop monitoring. This research investigated field bidirectional reflectance factor (BRF) in crop differentiation and PROSAIL leaf area index (LAI) estimation. BRF and LAI data were collected for planophile and erectophile crops at three growth stages. In the solar principal plane, BRF differed optimally at 860 nm 60 days after planting (DAP) for canola and pea, at 860 nm 45 and 60 DAP for wheat and barley, and at 860 nm and 670 nm 45 and 60 DAP for planophiles versus erectoph

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