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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.

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Showing 21 to 30 of 528 (0.065 seconds)

Spelling suggestions: "subject:"colonisation"" "subject:"kolonisation""

21

Epidemiology and pathogenesis of mycelial soil borne Rhizoctonia solani AG 3 on potatoes (Solanum tuberosum)

Kyritsis, Polyvios January 2003 (has links)
This thesis describes aspect of the epidemiology and pathogenicity of the soil-borne phase of <i>Rhizoctonia solani </i>AG-3 (Kuhn) fungus on potatoes and its competitive saprophytic colonisation ability in the soil. Under controlled environmental conditions, stem canker incidence and severity increased with increasing levels of soil-borne inoculum but plateaued after ¼ inoculum level (i.e 1 Petri dish of <i>R. solani  </i>AG-3 per kg soil).  Up to the 1/20 inoculum stem canker occurred at a low level.  A significant increase occurred at 1/10 and 1/8 inoculum levels.  A similar pattern was observed for the competitive saprophytic colonisation ability of the fungus.  The fungus was attracted more by seed tubers than by stems and the incidence of black scurf was higher than stem canker at all inoculum levels tested.  Sclerotia developed on seed tubers even at low inoculum levels.  Favourable soil conditions for infection on stems and seed tubers were 10<sup>o</sup>C and soil moisture content of 40% water holding capacity.  Optimum moisture content for saprophytism was between 20-50% water holding capacity, although optimum levels of the individual soils tested varied.  Pot and laboratory experiments indicated that conditions for development of <i>R. solani</i> were more conducive in heavy than in light textured soils.  When fine sand was added in increasing quantities to a sandy clay loam soil, the disease initiated by the fungus was steadily reduced with an increase in sand content.  Potato cultivars differed in their susceptibility to <i>R. solani</i> at early stages of growth but  none of the cultivars tested showed complete resistance to the disease.  Depth of planting had no significant effect of <i>Rhizoctonia </i>stem and seed tuber infection.
635.21943
Saprophytic colonisation in soil
22

The structure and dynamics of Polytrichum piliferum communities

Hobbs, V. J. January 1984 (has links)
No description available.
611
Moss habitat colonisation
23

Diversity, ecology, reproductive biology and conservation of orchids of south east Bangladesh

Huda, Mohammed Kamrul January 2000 (has links)
No description available.
577
Pollination; Colonisation
24

Peasant formation and capitalist development : the case of Acre, South-West Amazonia

Bakx, K. S. January 1986 (has links)
No description available.
301
Colonisation in Amazonia
25

La structuration sociale en milieu de colonisation agro-forestière au XIXème siècle : St-Fulgence, 1852-1898 /

St-Hilaire, Marc, January 1984 (has links)
Mémoire (M.E.S.R.)-Université du Québec à Chicoutimi, 1984. / "Mémoire présenté pour satisfaire partiellement aux exigences du programme de maîtrise en études régionales en vue de l'obtention du diplôme de maîtrise ès arts" CaQCU Bibliographie: viii-xiv. Document électronique également accessible en format PDF. CaQCU
26

Le Burundi sous administration belge : la période du mandat : 1919-1939 /

Gahama, Joseph, January 1983 (has links)
Texte remanié de: Thèse--Lettres--Paris I, 1980. / Résumés en anglais, espagnol, arabe et kirundi. Bibliogr. p. 437-454.
Colonisation Belgique Burundi
27

Agrara bebyggelseprocesser : utvecklingen i Norrbottens kustland fram till 1900-talet /

Egerbladh, Inez. January 1987 (has links)
Akademisk avhandling--geografiska institutionen--Uméå, 1987.
28

In the wake of the ya'áats' xaatgáay ("iron people") : a study of changing settlement strategies among the Kunghit Haida /

Acheson, Steven Richard, January 1998 (has links)
D. Phil. dissertation--University of Oxford, 1991. / Bibliogr. p. 115-128.
29

Siirtoväen pika-asutuslaki 1940 : asutuspoliittinen tausta ja sisältö sekä toimeenpano... /

Hietanen, Silvo. January 1982 (has links)
Th.--Hist.--Helsinki, 1982. / Résumé en anglais. Bibliogr. pp. 288-304. Index.
30

L'Ascension d'un chef africain au début de la colonisation : Aouta le Conquérant : Dosso (Niger) /

Rothiot, Jean-Paul, January 1988 (has links)
Thèse--Lettres--Paris VII, 1984. / Bibliogr. p. 291-305.
Aouta, Français Colonisation Niger

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