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The analysis of branching patterns in treesSteingraeber, David Allen, January 1980 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1980. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 143-150).
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Modeling the diameter and locational distributions of branches within the crowns of loblolly pine trees /Doruska, Paul F., January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 63-66). Also available via the Internet.
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Photoinhibition under drought and high light loads in New Zealand's divaricate shrubs : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy in the School of Biological Sciences, University of Canterbury /Schneiderheinze, Jenny. January 2006 (has links)
Thesis (Ph. D.)--University of Canterbury, 2006. / Typescript (photocopy). Includes bibliographical references (leaves 232-259). Also available via the World Wide Web.
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Analysis of genes that regulate flowering and branch initiation in the shoot apex of Nicotiana tabacum and Arabidopsis /Ahearn, Kelly Patricia, January 2000 (has links)
Thesis (Ph. D.)--University of Oregon, 2000. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 50-54). Also available for download via the World Wide Web; free to University of Oregon users. Address: http://wwwlib.umi.com/cr/uoregon/fullcit?p9963440.
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Vergleichende Untersuchungen über Bau und Inhalt normaler und abnorm angeschwollener Äste von Tilia grandifoliaBergström, J. B. January 1914 (has links)
Thesis (doctoral)--Universität Bern, 1914. / Includes bibliographical references (p. 64-65).
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The effect of red light as a fall treatment on branching of rhododendron.Kasperek, Laurie Beth Menzel 01 January 1983 (has links) (PDF)
No description available.
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Modeling the diameter and locational distributions of branches within the crowns of loblolly pine treesDoruska, Paul F. 19 September 2009 (has links)
Crown structure for 9- to 30-year-old loblolly pine was quantified via analysis of branch diameters and location, both along and around the bole, using observational data from 68 trees. The trees analyzed ranged in size from 11.1 to 31.6 cm in DBH and from 8.30 to 25.67 m in height, and were growing in Piedmont and Atlantic Coastal Plain stands ranging from 70 to 200 sq. ft. BA/acre. A series of equations was used to describe the diameter distribution of branches. Circular statistics were used to examine branching patterns around the bole.
A recursive system of 2 equations was developed in order to predict the total number of branches within a crown. A series of 3 equations was used to describe the average of and range in diameter within a whorl. Attempts at modeling the height above ground to branches (whorls) were unsuccessful; therefore, equidistant spacing was assumed. Similarly, predicting the number of branches within a whorl of a certain height was difficult, and overall percentages were employed.
Analysis of branch azimuths on a whole tree basis indicated a uniform distribution was appropriate (and not a “circular normal” distribution). Finally circular correlation was used to analyze rotational patterns within and between whorls, and a strong positive correlation was found for consecutive whorls of the same number of branches.
From this study it was concluded that modeling crown structure will be difficult, with much variation occurring among trees. More data are necessary to better refine the baseline work herein presented. / Master of Science
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A sampling study of branching characteristics towards obtaining more efficiency for tree selection in breeding trialsGwebu, Simosabo Bhekinkhosi 12 1900 (has links)
Thesis (MSc)--Stellenbosch University, 2001. / ENGLISH ABSTRACT: A total of 125 trees covering a range of tree diameters were selected from a progeny trial
of open pollinated progenies of Pinus patuia for studies on trait assessments and
evaluation for branching characteristics. The trees comprised 25 families with each
family having five trees. The trial was 36 months old and was located in a relatively high
yielding site in Block B at Usutu in Swaziland. The height, diameter, the number of
branches and the number of whorls of each tree were recorded. In addition to these
objective assessments on individual trees, trees were given scores for branch size, branch
angle, stem straightness and crown coarseness. For the detailed branch evaluation study,
trees were marked at 20% and 50% of the total tree height and the section between this
range was used. On this section the internode length, the internode diameter, the branch
diameter and the branch angle were measured. It was observed that the objective
assessments correlated strongly with the scoring (subjective) and it was further
recommended that a closer look is needed to consider the prospects of employing
subjective assessments as a means of reducing costs incurred during objective trait
assessments. The branch sampling study revealed that there were prospects of assessing
fewer branches on a tree as opposed to assessing all the branches, which could be a major
contributor to the high costs in tree breeding. All three methods used to explore this
prospect showed some reasonable agreement with each other in this regard. The best
sample is to measure all branches in whorl one and two above 20% tree height followed
by sampling four branches, two from the first whorl and two from the second whorl.
There is a slight difference in these two samples as determined by the coefficents of determination. The study recommends that four branches can be used in the assessment
of the branch angle and the branch diameter on the trees when one considered the cost
elements. / AFRIKAANSE OPSOMMING: In 'n ondersoek na die evaluering van tak-eienskappe van Pinus patuIa is 125
bome in 'n oop-bestuifde nageslags-proef geselekteer. Hierdie bome is gekies met
groottes wat strek oor 'n wye verskeidenheid van borshoogtedeursnee. Die ondersoek het
25 families ingesluit met elke familie wat uit 5 bome bestaan. Die proef is 36 maande
oud en is gevestig in'n hoë produksiearea van Blok B, Usutu, in Swaziland. Die hoogte,
borshoogtedeurnee, aantal takke en die hoeveelheid takkranse is gemeet en bepaal by elk
van die 125 bome. Verder is punte toegeken vir takgrootte, takhoek, graad van
stamkromming en kroon grofheid. In die gedetailleerde tak-evaluasie is slegs die
stamseksie tussen 200!o en 50% van die totale boomhoogte gebruik. Op hierdie seksie
van die boomstam is die internodale afstand, die internodale deursnee, die takdeursnee en
die tak-hoek gemeet. Uit die gegewens wat versamel is, het dit geblyk dat daar sterk
korrelasie tussen die objektiewe evaluasie en die subjektiewe evaluasie (met gebruik van
kwalitatiewe eienskappe op 'n tellingbasis) verkry is. Hieruit word aanbeveel dat meer
aandag aan subjektiewe evaluasie (as vereenvoudigde evaluasieprosedure) bestee word
om kostes te besnoei. Die gedetailleerde tak-evaluasiestudie het aangedui dat die gebruik
van slegs 'n paar takke, in teenstelling met al die takke op die boom, voordelig kan wees
om verdere kostes van evaluasie te bespaar. Die beste monster is om al die takke in die
eerste twee takkranse bo 20% boomhoogte te meet. Daarnaas is die beste monster die
eerste twee grootste takke in die eerste en tweede takkranse. Die gebruik van hierdie
kleiner monsters vir evaluering het in sekere opsigte nog beter voorspellings gelewer as
in die gevalle waar al die takke in die eerste takkrans gebruik is. Die studie b aan dat In
betroubare monster van vier takke (twee uit elke takkrans bo 20% boomhoogte) geneem
kan word om die boom se takeienskappe te be-oordeel.
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