• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 44
  • 35
  • 5
  • 4
  • 4
  • 4
  • 2
  • 1
  • 1
  • Tagged with
  • 121
  • 21
  • 17
  • 13
  • 13
  • 13
  • 11
  • 9
  • 9
  • 9
  • 8
  • 7
  • 7
  • 7
  • 7
  • 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

Studies in orchidology / by R.S. Rogers

Rogers, Richard Sanders January 1936 (has links)
Offprints forming parts IV and V, and Plates I-IX in back pockets / vi, 121 leaves : / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (D.Sc.)--University of Adelaide, 1936
2

Determining the nutritional requirements for optimizing flowering of the nobile dendrobium as a potted orchid

Bichsel, Rebecca Gayle 15 May 2009 (has links)
Five experiments were conducted to determine how nitrogen (N), phosphorus (P), and potassium (K) rate and fertilizer termination time, duration of N application, and cold duration and light intensity affect growth and flowering of Dendrobium nobile Red Emperor ‘Prince’. The N, P, and K experiments were a factorial combination of five nutrient rates and three termination dates (1 Sept., 1 Oct., and 1 Nov. 2005). N and K rates were 0, 50, 100, 200, and 400 mg•L-1. Phosphorus rates were 0, 25, 50, 100, and 200 mg•L-1. For all nutrients, terminating fertilization on 1 Oct. or 1 Nov. resulted in thinner pseudobulbs. Pseudobulbs grew taller as N rate increased, peaking at 100 and 200 mg•L-1. There were interactions between N rate and fertilizer termination time on all reproductive characteristics. For all fertilizer termination times, flower number increased once N was applied. When terminated on 1 Nov., 200 and 400 mg•L-1 N caused a delay for the first flower to reach anthesis. Plants required more days to full flower when supplied with 200 mg•L-1 N until 1 Oct. All P rates resulted in taller plants with equally more nodes compared to 0 mg•L-1. For all three termination times, plants that were not supplied with P bloomed later than those receiving P. Plants produced the most flowers when P fertilization was terminated on 1 Oct. Plants required fewer days to reach full flower at the 1 Sept. P termination time. As K rate increased from 0 to 100 mg•L-1, height increased, with no further increase at higher rates. Total flower number and flowering node number were the lowest at 0 mg•L-1 K. Leaf number increased as N and K rates increased up to 200 mg•L-1. Nitrogen application did not affect vegetative or flowering characteristics when one rate was applied at four termination dates. In the last experiment, plants cooled at 10 °C for 2, 4, or 6 weeks with light or 4 weeks in darkness produced similar higher number of flowers per plant than those cooled in darkness for 2 or 4 weeks or those that remained in a greenhouse.
3

Studies in orchidology

Rogers, R. S. January 1900 (has links) (PDF)
Thesis (D.Sc.) -- University of Adelaide, 1936. / Offprints forming parts IV and V, and Plates I-IX in back pockets.
4

Evolution of Dendrochilum subgenus Platyclinis section Eurybrachium investigated in a phylogenetic context /

Barkman, Todd James, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 190-206). Available also in a digital version from Dissertation Abstracts.
5

Population ecology of Thelymitra matthewsii Cheeseman Orchidaceae, in Northern New Zealand

Fraser, Elizabeth Anne. January 2008 (has links)
Thesis (M.Sc. Biological Sciences)--University of Waikato, 2008. / Title from PDF cover (viewed March 12, 2009) Includes bibliographical references (p. 148-156)
6

Studies on dactylorchids.

Vermeulen, Pieter. January 1947 (has links)
Academisch proefschrift--Amsterdam. / "Samenvatting": p. [ix]-xii. "Stellingen" ([2] p.) inserted. Bibliography: p. [175]-180.
7

Conservation, ecology and propagation of the wild orchids of Hong Kong /

Yam, Tim-wing. January 1988 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1989.
8

Conservation and propagation of wild orchids in Hong Kong /

Tsui, Yuk-chun, Prisca. January 1992 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1992.
9

Ten educational slide-narrative programs on orchids

Micklow, Frederick A. 03 June 2011 (has links)
The present creative project was undertaken to prepare educational programs on orchids. The author has worked with orchids for a period of ten years during which time he has developed expertise in the taxonomy, culturing, photography and collection of this family of plants.The creative project involved the selection of 385 35 mm slides from the author's collection, and the development of narrative which illustrates basic information about the Orchidaceae. The programs were developed for audiences possessing at least a modest botanical background. Two specific groups expected to use the programs are botany students at Ball State University and members of the American Orchid Society.The material on orchids was divided into ten topics: (1) Definition of an Orchid, (2) Diversity of Orchids; (3) Pollination of Orchids, (4) Hybridization of Orchids; (5) Propagation of Orchids; (6) Culture of Orchids; (7) Culture and Problems of Orchids; (8) Species of Orchids; (9) Buying and Showing of Orchids; (10) Orchid Collecting in Paraguay. Complete sets of 35 mm slides to accompany the narrative for each program have been placed on file in the Department of Biology at Ball State University.Ball State UniversityMuncie, IN 47306
10

Fungal associations and aspects of seed biology of some orchids of Hong Kong /

Shan, Xuechan. January 1999 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references (leaves 175-196).

Page generated in 0.0423 seconds