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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Organic rotational no-till system adapted for Manitoba, Canada

Halde, Caroline January 2014 (has links)
In the northern Great Plains of Canada, there has been limited research conducted on reduced-tillage grain production systems managed organically. The objective was to adapt an organic rotational no-till system to the growing conditions of Manitoba, and to test its agronomic performance. A set of four experiments were conducted between 2010 and 2012, in Carman, MB, Canada. Mulches with hairy vetch (Vicia villosa Roth) showed the most promising results, producing the highest mulch biomass and organic no-till spring wheat (Triticum aestivum L.) yield. Organic flax (Linum usitatissimum L.) yield was significantly higher in no-till than in the two tillage treatments. Reduced content of soil nitrate-N and perennial weeds limited crop productivity after 4 yr under organic continuous no-till. In conclusion, the successful adaptation of the organic rotational no-till system to the growing conditions of Manitoba eliminated the need for tillage for a period of 1.5 to 2 yr.
2

Minimum cultivation and root diseases of wheat /

Neate, Stephen Michael. January 1984 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Plant Pathology, 1984. / Includes bibliographical references (leaves 133-144).
3

Herbicide combinations for establishing no-till soybeans (Glycine max) with an emphasis on the use of chlorimuron /

Moseley, Carroll, January 1990 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 169-171). Also available via the Internet.
4

Weed control in no-till corn as affected by cultivation, herbicide banding, and cover crop suppression /

VanLieshout, Lawrence Anthony, January 1992 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 133-141). Also available via the Internet.
5

Landscape ecology of rodents in a no-till agriculture system

Capelli, Jason L., January 2005 (has links) (PDF)
Thesis (M.S. in natural resources)--Washington State University. / Includes bibliographical references.
6

Pasture renovation with herbicide suppression of weeds and no-till seeding of orchardgrass

Fitzsimmons, James P. 17 June 1993 (has links)
No-till pasture renovation can increase the quality and forage yield of underproductive pastures. Decreased erosion, lower costs, and less lost grazing time are advantages of no-till renovation compared to conventional renovation. Unwanted vegetation is first controlled with herbicides to decrease competition for introduced orchardgrass. Two field trials were conducted using a split-plot design to compare three seeding methods and two herbicides. An Aerway no-till drill, a Tye double disk drill, and broadcast followed by harrowing were the seeding methods. Paraquat and glyphosate were used to determine herbicide effect on vegetation control. Orchardgrass did not adequately survive at either trial site. However, where some orchardgrass did survive, vegetation control was more important than seeding method. Competition from annual grasses, many germinating after herbicides were applied, was the reason for renovation failure. Herbicide and initial growth for best control. Yield was doubled in the first harvest by the addition of fertilizer. Early spring forage production from poor pastures is usually more than adequate, so the increase from fertilizer is of marginal value unless it is stored for later use. Yield increase did not carry over to the second harvest when it could be better utilized. Later application dates would extend yield increases from certain species if water is available. / Graduation date: 1994
7

Understanding 2,4-d resistance in prickly lettuce (Lactuca serriola L.) and evaluating chemical fallow systems for the inland PNW

Riar, Dilpreet Singh. January 2009 (has links) (PDF)
Thesis (Ph. D.)--Washington State University, December 2009. / Title from PDF title page (viewed on Feb. 8, 2010). "Department of Crop and Soil Sciences." Includes bibliographical references.
8

Herbicide performance and weed seedbank dynamics as affected by high residue conservation agriculture systems

Kelton, Jessica Ann. Price, Andrew J. January 2009 (has links)
Thesis--Auburn University, 2009. / Abstract. Includes bibliographic references (p.139-160).
9

Tillage effects on soil-water-air matrix and prediction of soil bulk density from cone index data /

Jayatissa, Dangallage Nimal, January 1990 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 119-127). Also available via the Internet.
10

Fall and spring broccoli yields and weed control under no-till and conventional tillage with overseeded legume living mulches /

Infante, Michelle Louise, January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 42-45). Also available via the Internet.

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