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dc.contributor.authorFraser, Joanna
dc.date.accessioned2010-03-22T03:21:40Z
dc.date.available2010-03-22T03:21:40Z
dc.date.issued1978
dc.identifier.urihttps://hdl.handle.net/10182/1536
dc.description.abstractIn field-sown wheat grown in Canterbury, variation in the density of ears accounts for most of the differences between grain yields (Dougherty 1973; Scott 1978; Scott et al. 1977). Ear number is a component of yield which is determined during August and September during which the crop produces a number of shoots or tillers at different times. Since few tillers survive to produce an ear, information on population changes in tillers was needed, especially as tiller mortalities of 40% are common in the Canterbury environment (Dougherty & Langer 1974). There is little information existing in the literature on the components of yield of ear-bearing tillers, although earlier work showed that the first-formed main stem ear contributed a major proportion to grain yield (Clements et al. 1973). The aim of the experiments reported in this thesis was twofold. First, to characterise the various groups of tillers and to monitor changes in tiller populations, and secondly to analyse the components of yield on those tillers which survived to produce an ear. In the first season (1976-1977), Karamu, a short-strawed awned wheat, and Kopara, a tall wheat were analysed together. As there were a number of interactions, indicating that the cultivars were responding differently to treatment, it was decided to monitor the tiller populations of the two cultivars separately in 2 trials for the 1977-1978 season. The thesis begins with a review of previous work on tillering in the temperate cereals. The remaining chapters with the exception of the Discussion in Chapter 9 discuss results of autumn-sown wheat over two seasons. Each of these chapters (2 to 8) is a complete unit where the methodology is outlined and the results are presented and discussed.en
dc.language.isoenen
dc.publisherLincoln College, University of Canterburyen
dc.rights.urihttps://researcharchive.lincoln.ac.nz/page/rights
dc.subjecttilleringen
dc.subjectwheaten
dc.subjectnitrogenen
dc.subjectcultivarsen
dc.subjectnitrogen fertiliseren
dc.subjectyield componentsen
dc.subjectdry matter distributionen
dc.subjectleaf area indexen
dc.subjectherbicidesen
dc.subjectfungicidesen
dc.subjectsowing rateen
dc.titleTiller population dynamics in wheaten
dc.typeThesisen
thesis.degree.grantorUniversity of Canterburyen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300200 Crop and Pasture Production::300203 Plant improvement (selection, breeding and genetic engineering)en
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300200 Crop and Pasture Production::300205 Agronomyen
lu.thesis.supervisorLanger, R. H. M.
lu.contributor.unitDepartment of Agricultural Sciencesen
dc.rights.accessRightsDigital thesis can be viewed by current staff and students of Lincoln University only. Print copy available for reading in Lincoln University Library. May be available through inter-library loan.en


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