Thèses sur le sujet « Crop fields »
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Castellazzi, M. S. « Spatio-temporal modelling of crop co-existence in European agricultural landscapes ». Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/3747.
Texte intégralStanley, Jordan. « Yield-Limiting Factors in North Dakota Soybean Fields ». Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28382.
Texte intégralFletcher, Penny Hazel. « The pollination of four wild plants species in crop fields ». Thesis, University of Reading, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533764.
Texte intégralShaw, Gordon W. « Oak regeneration in former crop fields in the Missouri river floodplan / ». free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1426103.
Texte intégralGilbert, J. « The population dynamics of field pansy (Viola arvensis) and red deadnettle (Lamium purpureum) in winter cereal and oilseed rape fields ». Thesis, Keele University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382899.
Texte intégralCoyne, Daniel L. « Epidemiology and crop loss assessment of rice nematodes in West Africa ». Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299612.
Texte intégralKim, Dong-Gill. « Nitrous oxide and methane fluxes in riparian buffers and adjacent crop fields ». [Ames, Iowa : Iowa State University], 2008.
Trouver le texte intégralReynolds, William Casey. « Establishment Rates and Growth Characteristics of Six Bermudagrass Cultivars for use on Athletic Fields and Golf Course Fairways ». NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-12112002-145750/.
Texte intégralChapkowski, Andrew J. « Geographical distribution of pediobius foveolatus in New Jersey soybean fields to control the Mexican bean beetle population ». Diss., Maryville, Mo. : Northwest Missouri State University, 2008. http://www.nwmissouri.edu/library/theses/ChapkowskiAndrew/index.htm.
Texte intégralThe full text of the thesis is included in the pdf file. Title from title screen of full text.pdf file (viewed on July 25, 2008) Includes bibliographical references.
Caiado, Marco Aurelio. « Modeling Fate and Transport of Nitrogen and Phosphorus in Crop Fields Under Tropical Conditions ». Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/28848.
Texte intégralPh. D.
Pelcat, Yann S. « Soil landscape characterization of crop stubble covered fields using Ikonos high resolution panchromatic images ». Thesis, Winnipeg : University of Manitoba, 2006. http://www.collectionscanada.ca/obj/s4/f2/dsk3/MWU/TC-MWU-224.pdf.
Texte intégralA thesis submitted to the Faculty of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science, Department of Soil Science. Includes bibliographical references.
Coulombe, Anne-Marie. « Evaluation of the seed bank content as a predictor of weed infestations in crop fields ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21063.pdf.
Texte intégralKarimi-Zindashty, Yousef. « Application of hyperspectral remote sensing in stress detection and crop growth modeling in corn fields ». Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85560.
Texte intégralIn 2000, aerial hyperspectral images (72 wavebands, ranging from 407 to 949 nm) were acquired, and analyzed using a stepwise approach to identify wavebands useful in detecting weed and nitrogen stresses. Discriminant analysis (DA) was used to classify different weed and nitrogen treatments and their combinations. This analysis showed greater classification accuracy (nearly 75%) than those obtained with artificial neural networks (58%) or decision tree algorithms (60%), at the initial growth stages, the time when remedial actions are most needed to alleviate weed and nitrogen stresses.
To explore the possibility of improving nitrogen stress detection in corn in the presence of a confounding water stress, ground-based 2151 narrow-waveband reflectance values (350 to 2500 nm), were collected in 2002. Using DA with the chosen subset of narrow-wavebands, a classification accuracy of greater than 95% was obtained.
For crop growth monitoring, the STICS model was evaluated for yield and biomass estimation in cornfields under different stressful growth conditions using the data collected from 2000 to 2002. Measured yield, biomass, and leaf area index (LAI) were used for both calibration and validation of the model. High correlation coefficients between the measured and estimated grain yield (0.96), biomass (0.98), and LAI (0.93) indicated that the model has good potential in the simulation of corn growth. The model was also linked with LAI values estimated from the hyperspectral observations using the Support Vector Machines technique. Coupling STICS with remote sensing resulted in an overall improvement in the simulation of corn yield (6.3%) and biomass (3.7%).
A new approach was developed to apply crop growth models for yield estimation in weedy areas. The proposed method first corrects the measured/estimated LAI values in weed infested fields for weed effect, and then uses the corrected LAI values as input to the crop growth model. The results showed that the crop yield and biomass predictions were correctly simulated by this method.*
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation).
Schwer, Laura Mary Jane. « SMALL MAMMAL POPULATIONS IN SWITCHGRASS STANDS MANAGED FOR BIOMASS PRODUCTION COMPARED TO HAY AND CORN FIELDS IN KENTUCKY ». UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/138.
Texte intégralCapiral, Mary Joy Josephine M. « Measurements of ammonia and nitrous oxide emissions from potato fields in Central Washington using differential optical absorption spectroscopy (DOAS), tracer dispersion, and static chamber methods ». Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Spring2009/m_capiral_042309.pdf.
Texte intégralTitle from PDF title page (viewed on May 21, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 87-91).
Alghamdi, Rashad Saeed. « Soil Warming and Drying and the Consequence to Crop Yields among Conservation Tillage Practices in Frigid Corn-Soybean Fields ». Thesis, North Dakota State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10605433.
Texte intégralConcerns over delayed soil warming and drying have hindered adoption of conservation tillage practices in frigid environments. Our objectives were to evaluate the effects of chisel plow (CP), vertical tillage (VT), strip tillage with coulters (STC), and strip tillage with shanks (STS) on soil warming and drying and their potential consequences to crop yields. A two-year study was conduct at three full-scale, producer-managed, corn-soybean fields in the Red River Valley of eastern North Dakota and western Minnesota. Tillage treatments were assessed to measure crop residue cover, soil temperatures, soil volumetric water contents, crop yields, and other metrics. Our study indicated significant differences for many soil physical and chemical parameters, but little to none for soil warming and crop yields. Yield differences were attributed to varying fertilizer management practices, timing, and application method. These findings emphasize the importance of field management practices that compliment conservation tillage for obtaining competitive crop yields.
Alghamdi, Rashad Saeed. « Soil Warming and Drying and the Consquence to Crop Yields among Conservation Tillage Practices in Frigid Corn-Soybean Fields ». Thesis, North Dakota State University, 2017. https://hdl.handle.net/10365/28405.
Texte intégralKenduiywo, Benson Kipkemboi [Verfasser], Matthias [Akademischer Betreuer] Becker, Uwe [Akademischer Betreuer] Soergel et Eichhorn [Akademischer Betreuer] Andreas. « Spatial-temporal Dynamic Conditional Random Fields crop type mapping using radar images / Benson Kipkemboi Kenduiywo ; Matthias Becker, Uwe Soergel, Eichhorn Andreas ». Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2016. http://d-nb.info/1117135209/34.
Texte intégralKapal, Debbie B. « Influence of a legume green manure crop on barley straw/stubble decomposition, and soil nitrogen retention and availability ». Lincoln University, 2008. http://hdl.handle.net/10182/701.
Texte intégralVarella, Alexandre Costa. « Modelling lucerne (Medicago sativa L.) crop response to light regimes in an agroforestry system ». Lincoln University, 2002. http://hdl.handle.net/10182/1477.
Texte intégralKnight, Kris William. « Effectiveness of naturally-occurring riparian forest buffers and grass filter strips at buffering concentrated flow from row crop fields to streams in northeast Missouri ». [Ames, Iowa : Iowa State University], 2007.
Trouver le texte intégralFord, R. J. « The effect of shading and crop load on flavour and aroma compounds in Sauvignon blanc grapes and wine ». Lincoln University, 2007. http://hdl.handle.net/10182/498.
Texte intégralStark, Christine H. « Effects of long- and short-term crop management on soil biological properties and nitrogen dynamics ». Lincoln University, 2005. http://hdl.handle.net/10182/30.
Texte intégralZhou, Shuang. « EVALUATING SOIL PHYSICAL AND CHEMICAL PROPERTIES FOLLOWING ADDITION OF NON-COMPOSTED SPENT COFFEE AND TEA FOR ATHLETIC FIELDS ». UKnowledge, 2017. https://uknowledge.uky.edu/pss_etds/96.
Texte intégralLeeks, C. R. F. « Determining seed vigour in selected Brassica species ». Lincoln University, 2006. http://hdl.handle.net/10182/1274.
Texte intégralKlatt, Björn Kristian Verfasser], Teja [Akademischer Betreuer] Tscharntke, Stefan [Akademischer Betreuer] Vidal et Alexandra-Maria [Akademischer Betreuer] [Klein. « Bee pollination of strawberries on different spatial scales - from crop varieties and fields to landscapes / Björn Kristian Klatt. Gutachter : Teja Tscharntke ; Stefan Vidal ; Alexandra-Maria Klein. Betreuer : Teja Tscharntke ». Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://d-nb.info/1044173440/34.
Texte intégralMoot, Derrick J. « Harvest index variability within and between field pea (Pisum sativum L.) crops ». Lincoln University, 1993. http://hdl.handle.net/10182/1285.
Texte intégralTolomio, Massimo. « Evaluation of long-term water management strategies for saving water and reducing nitrogen and phosphorus losses from agricultural fields : controlled drainage and surface flow constructed wetland case studies in Venice Lagoon drainage basin ». Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3421846.
Texte intégralIn the context of increasing water scarcity and surface water pollution caused by agricultural activities, new water management practices that tackle these issues and that could be used in different environments should be identified. The Venice Lagoon drainage basin (in north-eastern Italy) is a sensitive area to surface water pollution. The prevalence of flat lands and the presence of shallow phreatic groundwaters, however, create suitable conditions for the implementation of two water management practices that can reduce N and P loads coming from agricultural fields: controlled drainage (CD) and surface flow constructed wetlands (SFCWs). Long-term monitoring of the performances of these practices is required to provide sound results that are not contingent on annual weather variability. This work evaluates the performances of a CD and SFCW system in a long-term experiment. CD was monitored during the periods 1995-2002 and 2006-2013 for water balance and crop yield, and from 2007 to 2013 for N and P losses. The SFCW was monitored from 2007 to 2013 for N and P removal loads. CD permitted to reduce water outflows of 69%, and provided an overall increase in maize grain yield of 26.3% and in silage maize yield of 4.0%. NO3-N and PO4-P losses to surface waters were reduced by 92% and 65%, respectively. The SFCW showed annual apparent removal rates of 83% and 79% respectively for NO3-N and total N, and of 48% and 67% respectively for PO4-P and total P. Both CD and SFCW proved effective in reducing N and P loads, and CD helped increasing crop yield through water saving. For these reasons, the application of these two water management practices is advisable in this environment.
Bithell, S. L. « An evaluation of Solanum nigrum and S. physalifolium biology and management strategies to reduce nightshade fruit contamination of process pea crops ». Lincoln University, 2004. http://hdl.handle.net/10182/1160.
Texte intégralSamson, Roger A. (Roger Anthony). « On-farm evaluation of cultivation, cover crops and chemical banding for crop and weed management in integrated farming systems ». Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55700.
Texte intégralFu, J. « Effects of different harvest start times on leafy vegetables (Lettuce, Pak Choi and Rocket) in a reaping and regrowth system ». Lincoln University, 2008. http://hdl.handle.net/10182/670.
Texte intégralSmith, Joshua Dwayne. « Impacts of Cover Crops on Carbon Dioxide and Nitrous Oxide Flux from a Row Crop Agricultural Field in Central Illinois ». OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1391.
Texte intégralSutherland, M. J. « The influence of vine vigour and canopy ideotype on fruit composition and aroma of Sauvignon Blanc ». Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1270.
Texte intégralChilderhouse, Emma. « The effect of a natural plant extract and synthetic plant growth regulators on growth, quality and endogenous hormones of Actinidia chinensis and Actinidia deliciosa fruit : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Horticultural Science at Massey University, New Zealand ». Massey University, 2009. http://hdl.handle.net/10179/1052.
Texte intégralTonmukayakul, Nop. « Water use efficiency of six dryland pastures in Canterbury ». Lincoln University, 2009. http://hdl.handle.net/10182/1498.
Texte intégralNambuthiri, Susmitha Surendran. « Soil water and crop growth processes in a farmer's field ». Lexington, Ky. : [University of Kentucky Libraries], 2010. http://hdl.handle.net/10225/1140.
Texte intégralTitle from document title page (viewed on May 12, 2010). Document formatted into pages; contains: xii, 310 p. : ill. (some col.). Includes abstract and vita. Includes bibliographical references (p. 298-309).
Monks, D. P. « The vegetative and reproductive development of balansa clover ». Lincoln University, 2009. http://hdl.handle.net/10182/1337.
Texte intégralCraft, Kortney E. « Economic Impacts of Drought on Kentucky Corn, Hay, and Soybeans ». TopSCHOLAR®, 2011. http://digitalcommons.wku.edu/theses/1066.
Texte intégralBates, Andrew John. « Effects of grazing management and pasture composition on the nitrogen dynamics of a dairy farm : a simulation analysis : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Lincoln University / ». Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1360.
Texte intégralKang, Sideth. « Effect of irrigation on growth and nitrogen accumulation of Kabuli chickpea (Cicer arietinum L.) and narrow-leafed lupin (Lupinus angustifolius L.) ». Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1126.
Texte intégralKean, J. M. « Metapopulation theory in practice ». Lincoln University, 1999. http://hdl.handle.net/10182/1372.
Texte intégralVillarreal, Manzo Luis Alberto. « Water Conservation in Biofuels Development : Greenhouse and Field Crop Production with Biochar ». Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195060.
Texte intégralWadsworth, A. C. « Control of spikelet survival in spring barley cv. Maris Mink ». Thesis, University of Bristol, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379532.
Texte intégralLeathwick, D. M. « Applied ecology of the Tasmanian lacewing Micromus tasmaniae Walker (Neuroptera : Hemerodiidae) ». Lincoln College, University of Canterbury, 1989. http://hdl.handle.net/10182/1044.
Texte intégralWhelan, Brett Michael. « Reconciling continuous soil variation and crop yield : a study of some implications of within-field variability for site-specific crop management ». Thesis, University of Sydney, 1998. https://hdl.handle.net/2123/27516.
Texte intégralBourguignon, Emmanuel. « Ecology and diversity of indigenous Trichoderma species in vegetable cropping systems ». Lincoln University, 2008. http://hdl.handle.net/10182/641.
Texte intégralPatterson, R. G. « A study of the soils and agronomy of a high country catchment ». Lincoln University, 1993. http://hdl.handle.net/10182/1315.
Texte intégralChen, Changping 1958. « Production variability for major Arizona field crops ». Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291617.
Texte intégralSencan, Secil. « Decision Tree Classification Of Multi-temporal Images For Field-based Crop Mapping ». Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605503/index.pdf.
Texte intégralil M. Sc., Department of Geodetic and Geographic Information Technologies Supervisor: Assist. Prof. Dr. Mustafa Tü
rker August 2004, 125 pages A decision tree (DT) classification approach was used to identify summer (August) crop types in an agricultural area near Karacabey (Bursa), Turkey from multi-temporal images. For the analysis, Landsat 7 ETM+ images acquired in May, July, and August 2000 were used. In addition to the original bands, NDVI, PCA, and Tasselled Cap Transformation bands were also generated and included in the classification procedure. Initially, the images were classified on a per-pixel basis using the multi-temporal masking technique together with the DT approach. Then, the classified outputs were applied a field-based analysis and the class labels of the fields were directly entered into the Geographical Information System (GIS) database. The results were compared with the classified outputs of the three dates of imagery generated using a traditional maximum likelihood (ML) algorithm. It was observed that the proposed approach provided significantly higher overall accuracies for the May and August images, for which the number of classes were low. In May and July, the DT approach produced the classification accuracies of 91.10% and 66.15% while the ML classifier produced 84.38% and 63.55%, respectively. However, in August nearly the similar overall accuracies were obtained for the ML (70.82%) and DT (69.14%) approaches. It was also observed that the use of additional bands for the proposed technique improved the separability of the sugar beet, tomato, pea, pepper, and rice classes.
Morris, Antony James. « Manipulating crop and field-margin vegetation structure for birds and food resources ». Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515697.
Texte intégral