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Dissertations / Theses on the topic 'Crop parameter'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Perkins, Seth A. "Crop model review and sweet sorghum crop model parameter development." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/14037.

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Master of Science<br>Department of Biological and Agricultural Engineering<br>Kyle Douglas-Mankin<br>Opportunities for alternative biofuel feedstocks are widespread for a number of reasons: increased environmental and economic concerns over corn production and processing, limitations in the use of corn-based ethanol to 57 billion L (15 billion gal) by the Energy Independence and Security Act (US Congress, 2007), and target requirements of 136 billion L (36 billion gal) of renewable fuel production by 2022. The objective of this study was to select the most promising among currently available

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2

Lamsal, Abhishes. "Crop model parameter estimation and sensitivity analysis for large scale data using supercomputers." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/34576.

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Doctor of Philosophy<br>Department of Agronomy<br>Stephen M. Welch<br>Global crop production must be doubled by 2050 to feed 9 billion people. Novel crop improvement methods and management strategies are the sine qua non for achieving this goal. This requires reliable quantitative methods for predicting the behavior of crop cultivars in novel, time-varying environments. In the last century, two different mathematical prediction approaches emerged (1) quantitative genetics (QG) and (2) ecophysiological crop modeling (ECM). These methods are completely disjoint in terms of both their mathematics

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3

Coppa, Isabel Patricia Maria, and Isabel coppa@csw com au. "The use of remote sensing data for broad acre grain crop monitoring in Southeast Australia." RMIT University. Mathematical and Geospatial Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070201.095831.

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In 2025, there will be almost 8 billion people to feed as the worlds population rapidly increases. To meet domestic and export demands, Australian grain productivity needs to approximately triple in the next 20 years, and this production needs to occur in an environmentally sustainable manner. The advent of Hi-tech Precision Farming in Australia has shown promise in recent time to optimize the use of resources. Most

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4

Abebe, Yibekal Alemayehu. "Managing the soil water balance of hot pepper (Capsicum annuum L.) to improve water productivity." Thesis, University of Pretoria, 2010. http://hdl.handle.net/2263/25257.

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A series of field, rainshelter, growth cabinet and modelling studies were conducted to investigate hot pepper response to different irrigation regimes and row spacings; to generate crop-specific model parameters; and to calibrate and validate the Soil Water Balance (SWB) model. Soil, climate and management data of five hot pepper growing regions of Ethiopia were identified to develop irrigation calendars and estimate water requirements of hot pepper under different growing conditions. High irrigation regimes increased fresh and dry fruit yield, fruit number, harvest index and top dry matter pr

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5

Rabe, Nicole J., and University of Lethbridge Faculty of Arts and Science. "Remote sensing of crop biophysical parameters for site-specific agriculture." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2003, 2003. http://hdl.handle.net/10133/195.

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Support for sustainable agriculture by farmers and consumers is increasing as environmental and socio-economic issues rise due to more intensive farm practices. Site-specific crop management is an important component of sutainable agriculture, within which remote sensing can play an integral role. Field and image data were acquired over a farm in Saskatchewan as part of a national research project to demonstrate the advantages of site-specific agriculture for farmers. This research involved the estimation of crop biophysical parameters from airborne hyperspectral imagery using Spectral Mixture

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6

Jalali-Farahani, Hamid Reza 1960. "Crop water stress parameters for turfgrass and their environmental dependability." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/191950.

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The concept of crop water stress index (CWSI) was explored using empirical and theoretical models to evaluate bermudagrass water status. The empirical methods were simplifications of the crop energy balance equation. Measured field data were employed to develop the empirical CWSI parameters. Field data were collected from turf plots under three levels of irrigation for the 1986 growing season in Tucson, Arizona. The simplest empirical model of Idso gave the highest variance in estimates of CWSI for all treatments with the estimates being highly influenced by net radiation. An improved empirica

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7

Burkart, Andreas [Verfasser]. "Multitemporal assessment of crop parameters using multisensorial flying platforms / Andreas Burkart." Bonn : Universitäts- und Landesbibliothek Bonn, 2016. http://d-nb.info/1096330075/34.

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8

Varella, Hubert Vincent. "Inversion d’un modèle de culture pour estimer spatialement les propriétés des sols et améliorer la prédiction de variables agro-environnementales." Thesis, Avignon, 2009. http://www.theses.fr/2009AVIG0638/document.

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Les modèles de culture constituent des outils indispensables pour comprendre l’influence des conditions agropédoclimatiques sur le système sol-plante à différentes échelles spatiales et temporelles. A l’échelle locale de la parcelle agricole, le modèle peut être utilisé dans le cadre de l’agriculture de précision pour optimiser les pratiques de fertilisation azotée de façon à maximiser le rendement ou le revenu tout en minimisant le lessivage des nitrates vers la nappe. Cependant, la pertinence de l’utilisation du modèle repose sur la qualité des prédictions réalisées, basée entre autres sur u

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9

Maqrot, Sara. "Méthodes d'optimisation combinatoire en programmation mathématique : Application à la conception des systèmes de verger-maraîcher." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30131.

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Dans le cadre du développement durable et des innovations dans les systèmes agroalimentaires, les systèmes mixtes horticoles (vergers et maraîchage) visent à répondre aux enjeux actuels auxquels l'agriculture est confrontée, à savoir une diminution de la pollution des sols, une meilleure gestion des ressources (eau, énergies) et un enrichissement de la biodiversité, tout en continuant d'assurer des fonctions alimentaires. Ils combinent des productions à la fois diversifiées et relativement intensifiées, leur permettant de s'insérer en périphérie urbaine. Ces systèmes agroforestiers reposent su

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10

Portz, Gustavo. "Use of crop canopy sensors in the measurement of sugarcane parameters aiming site-specific nitrogen fertilization management." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-17092015-101022/.

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Plant canopy sensors have emerged as a new tool for in field on-the-go spatially localized prediction of plant biomass and nitrogen (N) uptake by crops in an indirectly and plant indestructible way as base for N variable rate fertilization. Sensors based on the combination of specific reflectance bands from the electromagnetic spectrum constitute the vast majority of canopy sensors, and this principle has already been validated in many crops. Alternatively to this concept, the use of ultrasonic distance sensors to measure crop canopy height has been presented as an option to estimate biomass.

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11

Njaimwe, Arnold Ngare. "Tillage and crop rotation impacts on soil, quality parameters and maize yield in Zanyokwe Irrigation Scheme, South Africa." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/460.

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Intensive tillage and monoculture cropping practices reduce soil C accumulation hence increasing soil vulnerability to chemical, physical and biological degradation. This study focussed on enhancing biomass production of wheat and oat winter cover crops as a means of increasing C sequestration in the low organic C soils of the central part of Eastern Cape Province. The specific objectives were (i) to evaluate the short-term effects of no till and cereal-fallow based crop rotations on; soil organic matter related parameters, pH and electrical conductivity, (ii) soil bulk density, water retentio

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12

Perbandt, Daniela. "Determination of yield and quality parameters of energy crops applying laboratory and field spectroscopy." Kassel Universitätsbibliothek Kassel, 2010. http://d-nb.info/1003606652/34.

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13

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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14

Perbandt, Daniela [Verfasser]. "Determination of yield and quality parameters of energy crops applying laboratory and field spectroscopy / Daniela Perbandt." Kassel : Universitätsbibliothek Kassel, 2010. http://d-nb.info/1003606652/34.

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15

Götze, Philipp [Verfasser]. "Impact of specialised sugar beet crop rotations on soil fertility parameters and on yield and yield stability of sugar beet / Philipp Götze." Halle, 2017. http://d-nb.info/1137867655/34.

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16

Ahmadian, Nima [Verfasser]. "Integrating Satellite Remote Sensing and In-situ Measurements to Estimate the Biophysical Parameters of Agricultural crop using Multispectral and Radar Data / Nima Ahmadian." Greifswald : Universitätsbibliothek Greifswald, 2017. http://d-nb.info/1138116963/34.

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17

Callum, Ian R. "Long-term effects of tillage and residues on selected soil quality parameters." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31202.

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A two year study was initiated in 1999 at the Macdonald Campus Farm, on a 2.4 ha site consisting mainly of St-Amable sand to shallow loamy sand (Typic Endoaquent; Humic Gleysol). The site was planted to alfalfa ( Medicago sativa) prior to the establishment of the experimental design and has been planted to corn (Zea mays L.) since 1991. The experiment was set up as a randomized complete block design and consisted of three tillage levels (NT, no-till; RT, reduced tillage; and CT, conventional tillage) and two residue levels (-R, no residues; +R, with residues). This study was performed in order

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18

Thapa, Shyam. "Optimization of Parameters for the Densification (Pelletization) of Cereal Crop Residues and Feasibility Study of Pellet Plant Development in the State of Arkansas from Economic Perspective." Thesis, Arkansas State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10640883.

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<p> Conventional cereal crop residues, namely, rice (<i> Oryza sativa</i> L.), corn (<i>Zea mays</i> L.), and wheat (<i>Triticum aestivum</i> L.) is very abundant and readily available widely. It has been a nuisance to agronomic producers to manage these immense “so-called wastes”. The Energy Independence and Security Act (EISA) promulgated by the United States and The EU’s renewable energy directive mandated the substantial incorporation of renewable energy in their final energy consumption. These led to the increase in R&D’s on biomass and bioenergy products in th

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19

Harena, Tchamse. "Essai de validation et perspectives d'application en agrometeorologie d'un modele de simulation de la croissance et du developpement du mais : ceres-maize." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF2D214.

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Apres une description du modele couple de simulation du bilan hydrique, du developpement et de la croissance, les valeurs simulees sont comparees aux donnees recueillies lors de quatre annees d'experimentation dans le puy-de-dome sur deux varietes de mais (dea et boree). On a constate que du point de vue phenologique le modele presente un retard de precocite et que les valeurs de croissance sont sous estimees. On etudie la sensibilite du modele aux parametres genetiques d'entree et a deux coefficients numeriques (phyllochrone et plastochrone), puis a la variation de l'etat hydrique du sol et a

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20

Roux, F. A. "Die invloed van spesifieke grond en klimaats parameters op wingerdprestasie, wynkwaliteit en -karakter." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1343.

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21

Guerrier, Gilles. "Recherche de tests physiologiques de vigueur germinative en milieu NaCl." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375980647.

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22

Paget, Mark Frederick. "Genetic evaluation models and strategies for potato variety selection." Thesis, University of Canterbury. Forestry, 2014. http://hdl.handle.net/10092/9953.

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A series of studies are presented on the genetic evaluation of cultivated potato (Solanum tuberosum L.) to improve the accuracy and efficiency of selection at various stages of a breeding programme. The central theme was the use of correlated data, such as relationship information and spatial and across-trial correlations, within a linear mixed modelling framework to enhance the evaluation of candidate genotypes and to improve the genetic response to selection. Analyses focused on several social and economically-important traits for the enhancement of the nutritional value, disease resistance

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23

Kamacharova, Ilina [Verfasser], and Raimund [Akademischer Betreuer] Erbel. "Prognostische Aussagekraft von klinischen Scoring-Systemen (SAPS II und SAPS3) und laborchemischen Parametern (CRP, IL-6, PCT) bei internistischen Intensivpatienten / Ilina Kamacharova ; Betreuer: Raimund Erbel." Duisburg, 2019. http://d-nb.info/119359085X/34.

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24

Rodrigues, Wagner Nunes. "Comportamento de grupos de clones de café Conilon, selecionados no norte, na região sul do Estado do Espírito Santo." Universidade Federal do Espírito Santo, 2010. http://repositorio.ufes.br/handle/10/6629.

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Made available in DSpace on 2016-12-23T14:37:42Z (GMT). No. of bitstreams: 1 Wagner Nunes Rodrigues.pdf: 870082 bytes, checksum: 5dd904e97e99fea66f73afc1ec91a6ee (MD5) Previous issue date: 2010-08-18<br>A cafeicultura é uma atividade de grande importância social e econômica. O Brasil é o maior produtor mundial e o Estado do Espírito Santo é o segundo maior produtor nacional de café, sendo responsável por aproximadamente 70% da produção de café Conilon do País. No citado Estado, a espécie Coffea canephora, em especial a variedade Conilon, é a mais plantada. Existe uma expressiva variabilidade

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25

Dassa-Girard, Michèle. "Etude comparee des activites phosphatasiques acides et des parametres hydriques foliaires de cultivars de mil (pennisetum americanum l. ) soumis a des contraintes hydriques." Paris 7, 1987. http://www.theses.fr/1987PA077048.

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Ce travail a porte sur trois cultivars de mil (pennisetum americanum l. ) cultives depuis de nombreuses annees dans des regions du burkina faso a pluviosite moyenne annuelle tres differenciee. Nous avons emis l'hypothese que ces cultivars presentaient des degres d'adaptation a la secheresse relies aux differentes contraintes climatiques de ces regions. Nous avons compare plusieurs criteres physiologiques dont certains semblent lies classiquement a la resistance a la secheresse

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26

Jordan, Marie-Odile. "Mise en place du systeme racinaire du mais : definition et caracterisation au champ et en conditions controlees des parametres descriptifs du systeme racinaire, construction de l'organigramme d'un modele cinetique." Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13329.

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Une analyse bibliographique montre que si l'architecture des parties aeriennes est bien connue chez le mais, il n'en est pas de meme du systeme racinaire. Nous avons donc entrepris un travail de synthese a ce sujet. Dans la premiere partie de cette etude, les parametres descriptifs de la structure racinaire sont definis. Leur evolution au cours du cycle est ensuite caracterisee en conditions habituelles de culture, et, en rhizotrons. Quatre categories de racines primaires ont pu etre mises en evidence

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27

Mohamed, Nahla Abdel-Fattah Hemdan. "Irrigation systems." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2014. http://dx.doi.org/10.18452/16977.

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In der Wintersaison 2005-2006 wurde ein Split-Split Plot-Design Feldversuch mit drei Wiederholungen für jede Behandlung von Kartoffeln, als Indikatorpflanze, unter den ariden Bedingungen der Kharga Oasis in der Westlichen Wüste von Ägypten durchgeführt. Drei Bewässerungslevel (100 %, 80 %, und 60 % of ETc) mit Tröpfchenbewässerung, zwei Mulchvarianten (Zuckerrübenabfall ohne und mit 24 ton ha-1) und 4 Kompostraten (0, 12, 24, und 36 ton ha-1) wurden getestet. Generell und als Ergebnis einer Regressionsanalyse der Versuchsvarianten ohne Kompost war die beste Variante die Tröpfchenbewässerung be

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28

Zbigniewicz, Maria W. "Plant composition, standing crop and environmental parameters in the estuary of the Churchill River, Manitoba." 1986. http://hdl.handle.net/1993/29959.

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29

Ballester, Berman Josep David. "Retrieval of biophysical parameters of agricultural crops using polarimetric sar interferometry." Doctoral thesis, 2001. http://hdl.handle.net/10045/9203.

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30

Ballester-Berman, J. David. "Retrieval of biophysical parameters of agricultural crops using polarimetric sar interferometry." Doctoral thesis, 2007. http://hdl.handle.net/10045/9203.

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31

KRÁL, Radim. "Hodnocení výnosových parametrů hybridního ozimého žita." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-395344.

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The main part of the thesis is evaluation of yield and qualitative parameters of hybrid winter rye. A small plot experiment was made at the Faculty of Agriculture of the University of South Bohemia in České Budějovice (380 m). The trial took place in two years: 2016/2017 and 2017/2018. The effect of sowing (early and late), seed quantity (standard - 2 MKS / ha and reduced - 1 MKS / ha), variety and year were evaluated in three varieties of hybrid rye (Cossani, Performer, Santini). To achieve the most accurate results, all 12 variants were sown in 4 replicates. From the qualitative parameters w

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32

Heinzel, Vanessa [Verfasser]. "Retrieval of biophysical parameters from multi-sensoral remote sensing data, assimilated into the crop growth model CERES-Wheat / vorgelegt von Vanessa Heinzel." 2008. http://d-nb.info/1000208192/34.

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33

Glas, Clara Gwendolin Luise. "Bedeutung klinischer und paraklinischer Parameter in Prä-, Peri- und Postnatalphase für die Diagnostik der Early-Onset Sepsis beim Neugeborenen." 2019. https://ul.qucosa.de/id/qucosa%3A70857.

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In dieser retrospektiven Pilotstudie wurde die Aussagekraft klinischer und paraklinischer Parameter in Prä-, Peri- und früher Postnatalphase für die Diagnostik der klinischen Early-Onset Sepsis beim Neugeborenen untersucht. Der postnatal innerhalb von drei Tagen beim Kind gemessene CRP-Wert mit einem Cut-off von 10 mg/l wurde für die Differenzierung klinische Sepsis / keine Sepsis herangezogen. Die Analyse der zwei nach CRP-Werten getrennten Kollektive erfolgte hinsichtlich verschiedener Faktoren (wie z.B. Kreislauf und Laborparameter der Mutter vor der Geburt bzw. Labor – und Kreislaufparamet

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34

Düring, Silvia. "Laborchemische und klinische Parameter als Marker der Krankheitsaktivität bei Morbus Crohn und Colitis ulcerosa." Doctoral thesis, 2019. http://hdl.handle.net/11858/00-1735-0000-002E-E617-0.

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35

Moila, Maserole Mavis. "Effect of arbuscular mycorrhizal fungi and different phosphorus rates on selected soil and growth parameters of two dry bean cultivars." Thesis, 2018. http://hdl.handle.net/10386/2449.

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Thesis (M.Sc. (Agriculture)) --University of Limpopo, 2018<br>Dry bean is one of the most important cash crops and source of protein for small holder farmers. Low yields of dry bean are often reported to be associated with lack of inoculation (Arbuscular mycorrihizal fungi) of seeds prior to planting. Soil phosphorus (P) unavailability is one of the major factors limiting yield of dry bean. Field and Greenhouse experiments were conducted to investigate the response of dry bean cultivars to inoculation and phosphorus application under dry land farming conditions at the Syferkuil experimental fa

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36

Raimi, Adekunle. "Quality assessment of commercial biofertilisers and the awareness of smallholder farmers in Gauteng Province, South Africa." Diss., 2018. http://hdl.handle.net/10500/24955.

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This study aimed to evaluate commercial biofertiliser quality and awareness amongst smallholder farmers in Gauteng Province, South Africa. Sixty-seven smallholder farmers were interviewed in Gauteng Province by using a survey method, while the physicochemical and microbiological properties of 13 biofertilisers were evaluated using laboratory experiments. The results showed that awareness and use of biofertiliser are very poor, with 96% of the smallholder farmers surveyed not having biofertiliser knowledge. Furthermore, the products lack basic quality parameters: 54% contained no biofertiliser

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