Global ETD Search

221	Investigating seed dispersal and seed bank dynamics in Hawaiian mesic forest communities / Bakutis, Ane C. L. January 2005 (has links) Thesis (M.S.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 128-137). Seeds Soil seed banks Forest ecology
222	The interior features of the Wyoming housepits possible storage features? / Rose, Victoria. January 2008 (has links) Thesis (M.A.)--University of Wyoming, 2008. / Title from PDF title page (viewed on Dec. 7, 2009). Includes bibliographical references (p. 148-162).
223	Closing the seed dispersal loop for Guettarda viburnoides (Rub.) connecting patterns of avian seed dispersal with population growth in a neotropical savanna / Loayza, Andrea Patricia. January 2009 (has links) Title from title page of PDF (University of Missouri--St. Louis, viewed February 23, 2010). Includes bibliographical references.
224	RECURRENT SELECTION FOR GERMINATION SALT TOLERANCE IN ALFALFA (SALINITY, FORAGES, BREEDING) Robinson, David Lowell, 1955- January 1986 (has links) No description available. Alfalfa -- Seeds. Germination. Plants -- Effect of salt on.
225	Sexual reproductive processes of plants in an alpine tundra environment 2015 April 1900 (has links) Sexual reproduction is an important mechanism shaping plant community composition that will likely be affected by unprecedented rates of climate change in Canada’s North. To anticipate potential changes in plant communities, I aim to understand how changing environmental conditions affect the processes of seed production and seedling emergence, and determine the overall impacts on the reproductive potential of alpine tundra vegetation in Yukon, Canada. I tested the effect of soil warming and nitrogen addition treatments on the timing and success of sexual reproduction of the six tundra species; Dryas octopetala M. Vahl, Salix arctica Pall, Salix reticulata L., Lupinus arcticus L., Carex microchaeta Holm, and Hierochloë alpina (Sw.) R. & S. A summer snow event occurred on 2 July 2012, and I considered the impacts of such an event on the reproductive timing and success of the study species. I also examined the influence of seed availability and soil conditions on initial seedling emergence of three tundra species and three boreal species. I applied seed to natural disturbance sites with bare substrate exposed, and to plots with altered soil temperature and nitrogen availability. Results indicated that reproductive phenology, seed production, and seed viability of tundra species were not affected by increases in soil temperature and/or nitrogen availability but were impacted by the snowfall event. In addition, changes in soil temperature and nitrogen did not affect seedling emergence. Seedling emergence of both boreal and tundra species increased on bare substrates, indicating that surface disturbance creates opportunities for seedling establishment. Overall, my study shows that factors affecting seed production and local disturbance will have greater impact on the success of sexual reproduction in tundra plant communities than changes in soil temperature or nutrients caused by climate change. reproduction tundra vegetation seeds tundra soils
226	Effects of delayed harvest on the quality of cotton planting seed Hofmann, Wallace Craig January 1980 (has links) No description available. Cottonseed -- Arizona. Seeds -- Quality. Harvesting time -- Arizona.
227	Effect of seed quality on yield of Pima cotton Sarmadnia, Gholam Hossein January 1979 (has links) No description available. Seeds -- Quality. Cottonseed -- Arizona. Cotton -- Arizona.
228	THE EFFECT OF TEMPERATURE AND RESERVE CARBOHYDRATE MATERIALS ON THE CHANGE FROM A VEGETATIVE TO REPRODUCTIVE STAGE OF GROWTH AND SEED SET IN ALFALFA Dobrenz, Albert Krubak, 1936- January 1965 (has links) No description available. Alfalfa -- Growth. Alfalfa -- Seeds. Plants -- Effect of temperature on.
229	SEED DORMANCY OF SIDEOATS GRAMAGRASS, BOUTELOUA CURTIPENDULA (MICHX.) TORR. Major, Roger Lee, 1944- January 1972 (has links) No description available. Side-oats grama. Dormancy in plants. Seeds.
230	Evaluation of tests to predict performance of cottonseed (Gossypium hirsutum L.) Comer, Larry Lee, 1940- January 1968 (has links) No description available. Cotton -- Seeds -- Testing. Cotton growing -- Arizona.

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