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Utilizing expert systems for tillage speed selectionBlack, Stanley Cash. January 1986 (has links)
Call number: LD2668 .T4 1986 B62 / Master of Science / Biological and Agricultural Engineering
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Interactions of the cutting edge of tillage implements with soil / John Milton Fielke.Fielke, John Milton January 1994 (has links)
Bibliography: leaves 217-225. / xv, 225 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Soil Science, 1994
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Interactions of the cutting edge of tillage implements with soilFielke, John Milton. January 1994 (has links) (PDF)
Bibliography: leaves 217-225.
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Pasture renovation with herbicide suppression of weeds and no-till seeding of orchardgrassFitzsimmons, 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
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Morphological and physiological responses of spring wheat (Triticum aevstivum L.) to spatial arrangements /Tolmay, John Peter Cleggenett. January 2008 (has links)
Dissertation (PhD(Agric))--University of Stellenbosch, 2008. / Accompanying CD-ROM in back pocket of thesis. Bibliography. Also available via the Internet.
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Understanding 2,4-d resistance in prickly lettuce (Lactuca serriola L.) and evaluating chemical fallow systems for the inland PNWRiar, 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.
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Herbicide performance and weed seedbank dynamics as affected by high residue conservation agriculture systemsKelton, Jessica Ann. Price, Andrew J. January 2009 (has links)
Thesis--Auburn University, 2009. / Abstract. Includes bibliographic references (p.139-160).
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A field evaluation of the wedge approach to the analysis of soil cutting by narrow blades.Desir, Finbar Lambert January 1981 (has links)
No description available.
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The effect of tillage systems on weed control and botanical composition in forage corn /Sampson, D. L. January 1988 (has links)
No description available.
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Decompaction of a degraded clay soilChambers, Robert January 1994 (has links)
An experiment was set up at Alfred College, in Eastern Ontario, to investigate methods of correcting the negative effects of deep compaction of fine textured soils. / The site was divided into two fields of four treatments with three replicates of each. Treatment 1 was control, treatment 2 subsoiled, treatment 3 compacted and treatment 4 compacted then subsoiled. In year 1 barley was sown in both fields, underseeded with alfalfa in Field 1. The following year alfalfa was grown in Field 1 and corn using minimum tillage in field 2. / Measurements included cone penetration resistance, dry bulk density, and crop yields. / It was found that compaction had a significant effect on lowering yields. However, due to the experiment methodology in the measuring of cone penetration resistance and dry bulk density plus a blocking effect in the corn field, the results were inconclusive statistically as to whether the subsoiling in combination with minimum tillage and alfalfa had an effect of decompacting the soil profile.
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