Dissertations / Theses on the topic 'Tillage'
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Lobb, David Allen. "Tillage translocation and tillage erosion in the complex upland landscapes of southwestern Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ31887.pdf.
Full textZhang, Ji. "Vibratory analysis of tillage operation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23896.pdf.
Full textSharifat, Karim. "Soil translocation with tillage tools." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0023/NQ37912.pdf.
Full textSyed, Nasser. "The Influence of Conservation Tillage and Conventional Tillage on Soil Bacterial Diversity in Southern Illinois." Thesis, The University of Southern Mississippi, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10750260.
Full textAgriculture in the Midwest United States (Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, and Wisconsin) is a critically important component of the United States economy and also for world exports of food grain. This is well reflected in the 2012 Census of Agriculture which showed that these states had a market value of crop and livestock products sold in excess of $80,000,000,000 (USDA, 2012). Within the U.S. the three Midwest states, Illinois, Iowa, and Minnesota are ranked 2nd, 3rd, and 4th for the economic value of crops sold. This economic value of agriculture in the Midwest encompasses not only corn, soybeans, livestock, vegetables, fruits, tree nuts, and berries but also nursery and many greenhouse plants. Soil is the one common underlying platform for agriculture and if agriculture has to remain profitable and sustainable, a scientific understanding of soils and their relationship to plant productivity is critical.
Soils harbor probably the most diverse microbial ecosystems on Earth (Delmont et al., 2011) and we are just beginning to understand the full extent of this diversity and how it influences agricultural productivity and how in turn agricultural practices influence the microbial diversity. Estimations indicate that approximately 1,000 Giga base pairs (Gbp) of microbial genomic sequences exist per gram of soil (Vogel et al., 2009). Microorganisms occupy almost every available niche on Earth and directly affect the environment and agricultural systems by a range of mechanisms that include biological nitrogen fixation (Hungria, Franchini, Campo, & Graham, 2005), suppression of diseases (Mendes et al., 2011), decomposition of organic components (Schmidt et al., 2011), plant growth promotion (Bhattacharya & Jha, 2012), soil nutrient cycling (Brussard, 2012) and bioremediation (Ali et al., 2012). Soil microbial community structure and its associated and interdependent biological processes can be affected by the way land is used and managed. Since a vast majority of soil microorganisms do not respond to "traditional" culturing techniques (Delmont et al., 2011), it has been difficult to study and characterize the functional and phylogenetic diversity of these important ecosystems until recent advances in next-generation DNA sequencing which have begun to unravel what is beneath our feet (Caporaso et al., 2010). According to Food and Agricultural Organization (FAO), the amount of land used for agriculture is about 11% (http://www.fao.org/docrep/005/y4252e/y4252e06.htm) and the emissions which can have serious environmental and health effects from agricultural food production far outweigh the total emissions from all the other industries combined (Bauer, Tsigardis, & Miller, 2016). Thus, any steps to fine-tune the management practices and the way the agricultural land is utilized can go a long way in sustaining our way of life while maintaining a healthy environment.
The purpose of this study is to examine the shifts in the taxonomic diversity of bacteria in soils at phylum, class and order level between two distinct agricultural practices–Conventional Tillage (CT) and Conservation Tillage (NT) in Southern Illinois along with changes in soil compaction and soil phosphatase activity. The larger idea, based on results reported here and elsewhere, is to encourage conservative tillage practices using a combination of diverse cover crop systems and continuous soil cover which seem to enhance functional microbial diversity in the soil (Ajay & Ngouajio, 2012; Verzeaux et al., 2016). Research also indicates the presence of higher numbers of bacteria of varied trophic groups, as well as increased species richness in bacteria in well-managed soils with minimal tilling and this, may correspond to more resilience to drying and rewetting disturbances in the soil (Anne et al., 2006).
This research may be the first to reconstruct the entire soil bacterial community in agricultural fields of Southern Illinois and will also hopefully be a precursor for more studies aimed at not only understanding soil from a biological bacterial perspective but also in deciphering interesting patterns that can help correlate changes in land management practices and how they impact bacterial communities. It may help us in developing a methodology to use bacterial taxa as indicators of soil management practices. The study will also detect previously unreported rare bacterial taxa-specific for this region and regional geochemistry.
Kopan, Suzanne. "Mechanical weed control in conservation tillage." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Thesis/Spring2007/s_kopan_010207.pdf.
Full textStenberg, Maria. "Soil tillage influences on nitrogen conservation /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1998/91-576-5468-9.gif.
Full textPatrick, Cecil. "Reservoir tillage for semi-arid environments." Thesis, Cranfield University, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426071.
Full textJerrell, Scottie Lee. "Strip-Tillage Production Systems for Tobacco." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/33132.
Full textMaster of Science
Love, Velva Ann. "Conservation tillage methods for cabbage production." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101121.
Full textM.S.
Thacker, Gary, and Mike Ottman. "Douple Cropping with Controlled Traffic Tillage." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/204535.
Full textThacker, Gary W., and Wayne E. Coates. "The Concept of Controlled Traffic Tillage." College of Agriculture, University of Arizona (Tucson, AZ), 1993. http://hdl.handle.net/10150/209541.
Full textKelly, John Kevin. "The effects of tillage, zero tillage and fertilizer sources on corn growth and yield and soil physical properties /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63272.
Full textOm, Sothy. "Energy efficiency of tillage operations in Cambodia /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17266.pdf.
Full textBelaoussoff, Svenja. "Carabid beetles as indicators of tillage disturbance." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/NQ51029.pdf.
Full textBentley, Darren. "Intelligent control of complex soil tillage machinery." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399714.
Full textRADITE, PRAEKO AGUS SETIAWAN. "ELECTRO-OSMOTIC LUBRICATION TO REDUCE TILLAGE DRAFT." Kyoto University, 1997. http://hdl.handle.net/2433/202412.
Full textNolte, Kurt, Mike Ottman, Trent Teegerstrom, and Guangyao (Sam) Wang. "Minimum tillage for wheat following winter vegetables." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/146999.
Full textWheat Production on Lettuce Beds
In 2009, over 56,000 acres were planted to wheat in Arizona, all of which following either a lettuce or cotton crop. For wheat grown in the region, the conventional tillage sequence prior to planting can be tied to as many as seven field operations that consume valuable time, labor, and resources. In this study, our aim was to determine the effectiveness of reducing the number tillage (minimum till) operations in fields immediately following lettuce harvest. And demonstrate to Southwest wheat producers a means for conserving time, fuel, and resources. Growing wheat on lettuce beds immediately following lettuce harvest did not significantly reduce grain yield or quality. Although the regrowth of the previous crop can have significant implications for Durum grown with minimum tillage if not managed effectively, lodging was not a significant factor in this study as the degree of lodging was similar in both growing systems. The significant savings in fuel, labor and time, with no apparent reduction in Durum yield or quality, may be a significant benefit to wheat producers who incorporate minimum tillage practices following a lettuce crop.
Coates, W. E., and G. W. Thacker. "A Comparison of Three Cotton Tillage Systems." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/208315.
Full textCoates, Wayne E., and Gary W. Thacker. "A Comparison of Three Cotton Tillage Systems." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/208611.
Full textCoates, Wayne E., and Gary W. Thacker. "A Comparison of Three Cotton Tillage Systems." College of Agriculture, University of Arizona (Tucson, AZ), 1993. http://hdl.handle.net/10150/209583.
Full textCoates, Wayne E., and Gary W. Thacker. "Reduced Tillage Systems for Airzona Cotton Growers." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/210921.
Full textJayatissa, Dangallage Nimal. "Tillage effects on soil-water-air matrix and prediction of soil bulk density from cone index data." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08252008-162557/.
Full textQiu, Hanxue. "Snow redistribution and soil water storage as impact by surface residue conditions." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/H_Qiu_012809.pdf.
Full textTitle from PDF title page (viewed on Apr. 10, 2009). "Department of Biological Systems Engineering." Includes bibliographical references (p. 16-21).
Boismier, William Arthur. "Modelling the effects of tillage processes on artefact distributions in the ploughzone : a simulation study of tillage-induced pattern formation." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627521.
Full textChen, Ying 1957. "Soil thermal regime resulting from reduced tillage systems." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41106.
Full textChanges in soil bulk density, soil surface reflectance and soil temperature changes with depth and time were studied theoretically and experimental as a function of variable soil properties, soil surface state, crop cover and atmospheric conditions.
A field experiment was carried out on sandy and clayey soils with each plot being subjected to a consistent tillage and fertilizer history of either conventional ploughing, reduced energy disking or zero tillage, and fresh dairy manure or manufactured inorganic fertilizer. The measured results and the quantitative models assist hopefully in identifying how soil management affects the soil thermal regime and in making cultivation management decisions.
Soil bulk density for each fertilizer type can be predicted quantitatively from input tillage energy in a linear fashion. The reflectance of the soil surface was estimated as an integrated form of the individual reflectance and the area fractions of the soil surface components, with a soil roughness correction term. This model can cover various surface situations under different schemes of soil management. A simulation model for soil temperature was developed, which can be applied to bare soil, partially crop-covered soil and completely crop-covered soil. The models can also be used as submodels or be linked to other existing models.
Martin, E. C., K. O. Adu-Tutu, W. B. McCloskey, S. H. Husman, P. Clay, and M. Ottman. "Reduced Tillage Effects on Irrigation Management in Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/197914.
Full textRein, B. K., G. W. Thacker, and W. E. Coates. "Energy Consumption and Yields for Cotton Tillage Systems." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/204818.
Full textDu, Croix Sissons Michelle J. "Effect of tillage on recruitment depth of five weed species measured in situ in zero and conventional tillage fields in Manitoba." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ41693.pdf.
Full textSchroeder, Brittany A. "Prescription Tillage Implementation via Creation of an Agronomic Rule Set and ISOBus Class III Control System for Achieving Spatially Variable Tillage." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562937966106841.
Full textD'Emden, Francis Herbert. "Adoption of conservation tillage : an application of duration analysis." University of Western Australia. School of Agricultural and Resource Economics, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0067.
Full textAllton, Kathryn E. "Interactions between soil microbial communities, erodibility and tillage practices." Thesis, Cranfield University, 2006. http://hdl.handle.net/1826/1580.
Full textBuragienė, Sidona. "Impact of different soil tillage technologies on the enviroment." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20140123_134417-70543.
Full textŽemės dirbimas yra vienas svarbiausių agrotechnologinių procesų, turinčių labai didelę įtaką kultūrinių augalų sėjai, sudygimui, augimui, derliui ir jo kokybei. Tuo pačiu žemės dirbimas yra ir vienas iš brangiausių ir energijai imliausių kultūrinių augalų auginimo agrotechnologinių procesų. Įprastinio žemės dirbimo technologijos, kuriose naudojamos verstuvinės ir intensyviai dirvą purenantys žemės dirbimo agregatai, greta teigiamo poveikio augalų sėklų guoliavietės paruošimui, yra pakankamai žalingos aplinkai, dirvai, jos savybėms, biologinei įvairovei, vandens telkinių taršai ir t.t. Įprastinio žemės dirbimo metu augalinės praėjusio derliaus liekanos yra įterpiamos į gilesnius dirvos sluoksnius ir dirvos paviršius lieka neuždengtas. Tokios dirvos yra žymiai jautresnės aplinkos veiksniams ir lengviau pažeidžiamos vėjo ir vandens erozijos. Kiekvienais metais, pasaulyje, dėl netinkamos žemės ūkio veiklos ir kintančių aplinkos sąlygų prarandama apie 6 mln. ha derlingų dirvos plotų. Kitas labai svarbus aspektas yra tas, kad žemės dirbimas gilaus arimo plūgais yra mažai našus, daug darbo laiko ir energijos sąnaudų reikalaujantis žemės dirbimas. Tuo pačiu daugkartinis didelės masės žemės ūkio agregatų važinėjimas po dirvą ne tik daro neigiamą įtaką jos savybėms, bet ir, sudeginant didelius kiekius dyzelinių degalų, stipriai teršia aplinką šiltnamio efektą sukeliančiomis dujomis. Todėl pastaruoju metu, siekiant mažinti žemės ūkio veiklos daroma neigiamą įtaką dirvos degradacijai... [toliau žr. visą tekstą]
Hessler, Alex G. "Reduced Tillage and Living Mulches for Organic Vegetable Production." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/33.
Full textBaradi, Niranjan Kumar. "Factors affecting the adoption of tillage systems in Kansas." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1142.
Full textMartin, Kent Lee. "Effect of phosphorus placement in reduced tillage crop production." Diss., Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1223.
Full textMartin, E. C., K. O. Adu-Tutu, W. B. McCloskey, S. H. Husman, P. Clay, and M. Ottman. "Conservation Tillage Effects on Infiltration and Irrigation Advance Times." College of Agriculture, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/198158.
Full textHusman, S., P. Clay, E. Taylor, and K. White. "Twin Line Cotton Production in a Conservation Tillage System." College of Agriculture, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/198170.
Full textRich, Heather. "NITROGEN FERTILITY MANAGEMENT IN NO-TILLAGE CUCUMBERS AND SQUASH." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1152.
Full textVan, der Vinne Jhony. "Sistemas de cultivo e métodos de implantação de cebola no verão /." Jaboticabal : [s.n.], 2006. http://hdl.handle.net/11449/96976.
Full textAbstract: The aim of the study was to determine the effects of til/age system and method of crop implementation on the root system of onions and on the physical properties of the soil (Experiment I and 11), as well as on the productivity of the cultivars in the summer, for the purpose of collecting bulbs in the period of low onion yield (Experiments 111 and IV). The experiments were conducted in red latosol soil, in São José do Rio Pardo-SP, between Oecember, 2004 and September, 2005. Experiment I, started in Oecember, compared tillage systems, conventional (plowing/harrowing) versus no-tillage, and collection areas of soil samples, row versus interrow. Experiment 11, started in February, examined the two tillage systems, where crops were implemented by direct seeding (DS) and transplanting seedlings produced in trays (TST) or in raised beds (TSR). Experiment 11I, started in Oecember, studied the productivity of Alfa Tropical, Alfa São Francisco and Mercedes, implemented by TST and TSR, cultivated with no tillage and with conventional soil preparation. Experiment IV, started in February, examined the same treatments as in Oecember but also the OS method. The root system was concentrated at a depth of O to 20 cm. The density of the roots was greater between O and 10 cm with no tillage compared to conventional soi! preparation. The physical attributes of the soil had no influence on root development. OS favored a greater root density compared to TST and TSR. High productivity was obtained with Alfa Tropical and Alfa São Francisco in Oecember, and in February with Mercedes. TST and OS resulted in productivities of up to 50 t ha-1, almost double that with TSR. Greater yield was obtained with no tillage versus the conventional system.
Orientador: Leila Trevizan Braz
Coorientador: Itamar Andrioli
Coorientadora: Teresinha de Jesus Deléo Rodrigues
Banca: Arthur Bernardes Cecílio Filho
Banca: Marcos David Ferreira
Mestre
Henning, Barend Johannes. "Agricultural recycling of sewage sludge for maize and oats cultivation." Diss., University of Pretoria, 2000. http://hdl.handle.net/2263/25006.
Full textKhan, Faizan-ul-Haq. "Analysis of factors affected by cultivation that determine the rate of NOâ†3N leaching from the soil." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262992.
Full textPachta, Matthew J. "Risk analysis of tillage and crop rotation alternatives with winter wheat for south central Kansas." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/3577.
Full textMaswaure, Justin. "Tillage forces and soil loosening as influenced by tool geometry." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23411.
Full textThe results showed that the draft increased with tool rake angle and width. Operating at a depth of 150 mm and 100 mm depth did not make any significant difference on the draft requirement. Low angles of attack were observed to have a greater potential to loosen the soil, and the loosening increased to a depth of 150 mm then decreased. The draft efficiency was affected by the angle of attack as well as the depth of operation. The cross sectional area of the furrow and hence the volume of soil manipulated was seen to depend on the width of the tool and the operating depth.
Slender tools and high rake angles were found to loosen the soil better than wide ones. No distinct trend existed between depth to width aspect ratio and draft requirement. No variation was observed between draft efficiency and d/w ratio. Penetration resistance increased with depth of operation as well as distance from the furrow centre after tillage. Some areas of residual high strength were sometimes left within the sphere of influence of the tools. Some tools dealt with these omissions better than others.
Fielke, John Milton. "Interactions of the cutting edge of tillage implements with soil." Title page, table of contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phf463.pdf.
Full textHerzog, Craig. "Canola Production as Influenced by Previous Crop and Tillage System." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1967998321&sid=7&Fmt=2&clientId=1509&RQT=309&VName=PQD.
Full textThakur, Tara Chandra. "An investigation into the mechanics of powered rotary tillage tools." Thesis, Cranfield University, 1985. http://dspace.lib.cranfield.ac.uk/handle/1826/4451.
Full textDec, Dorota Agnieszka. "Thermal properties in Luvisols under conventional and conservation tillage treatment /." Kiel : Inst. für Pflanzenernährung und Bodenkunde, 2006. http://e-diss.uni-kiel.de/diss_1904.
Full textKeller, Thomas. "Soil compaction and soil tillage - studies in agricultural soil mechanics /." Uppsala : Dept. of Soil Sciences, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a489.pdf.
Full textBaigys, Giedrius. "Soil water regime and nitrate leaching dynamics applying no-tillage." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20090217_111111-32108.
Full textĮvairių žemdirbystės sistemų naudojamų žemės ūkyje poveikis maisto medžiagų ir labiausiai nitratų išsiplovimui priklauso nuo daugelio veiksnių, kurių žemdirbiai siekdami didesnių derlių ir geresnių ekonominių rezultatų nepastebi, o kartais ir reikiamai neįvertina. Šiame darbe, nagrinėjamas šalyje netirtas vandens režimo ir nitratų azoto išplovimo pasikeitimų, keičiantis žemdirbystės sistemoms, klausimas. Šie tyrimai ypač aktualūs Lietuvos Vidurio lygumos sąlygomis, kur daugiausia auginama vienmečių augalų (javų ir cukrinių runkelių), kasmet žemė intensyviai aeruojama, taip didinant organinių medžiagų mineralizaciją, naudojama daug trąšų. Pakeitus tradicinį žemės dirbimą į sumažintą žemės dirbimą paviršinio dirvožemio sluoksnio vandens atsargos sumažėjo 4,91-5,85 %, o pakeitus į neariminį žemės dirbimą vandens atsargos sumažėjo 23,4 %. Sumažintas žemės dirbimas bei vėlyvas arimas yra tinkamos aplinkosauginės priemonės, mažinančios nitratų azoto išplovimą iš dirvožemio.
Campos, Magana S. G. "Development of a minimum tillage maize planter for Mexican agriculture." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239023.
Full text