• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 126
  • 123
  • 29
  • 11
  • 10
  • 10
  • 10
  • 10
  • 10
  • 10
  • 4
  • 4
  • 3
  • 2
  • 1
  • Tagged with
  • 343
  • 100
  • 44
  • 43
  • 42
  • 40
  • 40
  • 38
  • 36
  • 32
  • 31
  • 30
  • 30
  • 29
  • 26
  • 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.
101

Soil microbes as potential control agents for plant-parasitic nematodes in pasture / by Valerie N. Kempster.

Kempster, Valerie Noel January 2000 (has links)
Bibliography: leaves 108-152 / viii, 152 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This study investigates the induction of resistance to the clover cyst nematode, Heterodera trifolii Goffart, an economic pest in white clover pastures that are a key to high milk yields in dairy cattle...it explores the potential of soil and rhizosphere bacteria to induce systemic resistance in white clover, Trifolium repens L. (summary) / Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2000
102

Nitrogen fixation by pasture legumes : effects of herbicides and defoliation / by Abolhassan Fajri.

Fajri, Abolhassan January 1996 (has links)
Bibliography: leaves 209-254. / xv, 254 leaves : ill. (chiefly col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Experiments detailed in this thesis, evaluate the impact of various herbicides and herbicide mixtures on the growth, nodulation and nitrogen fixation of annual pasture legumes, the efficacy of the herbicides for weed control, and the potential role of mechanical defoliation to replace herbicides, leading to lower cost and more sustainable farming systems. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1996
103

Computer simulations of sheep grazing in the arid zone / by Ian R. Noble

Noble, Ian Roy January 1975 (has links)
308 p. : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--Dept. of Botany, University of Adelaide, 1976
104

Phosphorus transfer from land to water In pasture-based grazing systems

Nash, David Martin January 2002 (has links) (PDF)
Nutrient exports, in particular phosphorus, are a major problem for Gippsland and many other regions of the world. This thesis investigates the export of phosphorus in overland flow from pasture-based grazing systems in south-eastern Australia. Initially, field-scale monitoring is used to investigate the forms of phosphorus in overland flow with a view to identifying the primary mobilisation process. It is shown that from a well-managed pasture, phosphorus was primarily mobilised as a result of dissolution rather than physical detachment (erosion) processes. Phosphorus in the overland flow is shown to be predominantly in the dissolved reactive form (DRP). It follows that remedial strategies that rely on physically trapping phosphorus entrained in overland flow (i.e. buffer strips and riparian zones) are unlikely to be effective. The field-scale monitoring data are then used to investigate the structure of phosphorus exports. It is shown that the data conforms to a base-plus-increments model. It is proposed that phosphorus exports can be divided into a base or systematic component that results from a particular land use management system, and an incremental or incidental (preventable) component that is the result of particular management decisions, activities or incidents. (For complete abstract open document)
105

Computer simulations of sheep grazing in the arid zone / by Ian R. Noble

Noble, Ian Roy January 1975 (has links)
308 p. : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--Dept. of Botany, University of Adelaide, 1976
106

Hägnadernas roll för jordbruket och byalaget 1640-1900 /

Kardell, Örjan , January 2004 (has links) (PDF)
Diss. Uppsala : Sveriges lantbruksuniv., 2004.
107

Development and evaluation of a remote sensing algorithm suitable for mapping environments containing significant spatial variability : with particular reference to pastures /

McCloy, K. R. January 1987 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1989. / Includes bibliographical references (leaves 176-179).
108

Summer nutrition of sheep based on residues of annual crops and medic pastures /

Valizadeh, Reza. January 1994 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1994. / Includes bibliographical references (leaves 259-291).
109

The distribution and abundance of natural populations of Oncopera fasciculata (Walker) (Lepidoptera:Hepialidae), in South Australia /

Madge, P. E. January 1956 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Waite Agricultural Research Institute, 1955. / Typewritten copy. Includes bibliographical references.
110

An assessment of white clover nitrogen fixation in grazed dairy pastures of South-Western Victoria /

Riffkin, Penelope A. January 1999 (has links)
Thesis (M.Sc.) -- University of Western Sydney, Hawkesbury, 1999. / Thesis submitted for the degree of Master of Science. Includes bibliographical references (leaves 113-131).

Page generated in 0.0575 seconds