33,741 research outputs found

    EFRC Cereal Variety and Mixture Trials 2001 – Preliminary Results

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    Of 7 winter wheats grown at 3 sites in southern England in 2001, the highest yielding was the soft wheat Claire; the breadmaking varieties Hereward, Shamrock and Spark did well. Of the feed wheats, Aardvark outyielded Deben. Of various variety mixtures tried, Aardvark/Claire/Deben was highest yielding. When seed was saved from the 2000 harvest of Hereward/Malacca/Shamrock and grown in 2001, it outyielded the first generation mixture, suggesting that some adaptation had occurred, relative composition changing in response to the local conditions. Winter oats and triticale were trialled at one site in Berkshire. The triticales Ego and Fidelio performed well, as did the winter oat Kingfisher. The oat mixture Ego/Fidelio/Taurus outyielded the mean of its component varieties. The triticale mixture Ego/Fidelio/Taurus showed adaptation from 2000 to 2001

    Early ontogenetic male cone production in Pinus radiata : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Plant Biology at Massey University

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    The tree breeding industry is interested in early ontogenetic male cone production in Pinus radiata in order to maximise the rate at which successive generations can be bred. The foundation of this thesis was a study of how male cone production differed in various contrasting regions around New Zealand. A study was then carried out to assess whether various morphological and anatomical characteristics of trees were correlated with the onset of male cone production. Various treatments including stress, plant growth regulator application and grafting were examined to determine whether any of these could be used to promote early ontogenetic male cone production. The regional study found that male cone production commenced at age 3 in Nelson, at age 4 in Northern and Southern Kinleith, and age 6 in Karioi and Northland. Findings suggest that high sunshine hours and low autumn and/or winter temperatures are of significance to the precocity of male cone production. A tentative logistic model was developed that may adequately describe cone production across all regions. Morphological and anatomical characteristics of trees were used to develop a model which predicts the probability that a tree will not be producing male cones. Relative cell number was found to provide the greatest ability to predict whether or not a given tree will be producing male cones, supporting the hypothesis that a certain number of cell divisions are required before male cone production commences. Grafting did not promote male cone production in the present study. It is recommended that future grafting experiments for the purposes of promoting male cone production should reconsider the position within the crown at which grafts are made. Male cone production on fascicle cuttings approximately two years old was promoted by growing them under stress in small pots, with minimal watering and no fertiliser application. It is suggested that a "stress" pathway, distinct from the "normal" male cone production pathway is probably involved. Male cone promotion in fascicle cuttings appears to be enhanced through the application of ABA, but not other plant growth regulators. Additionally, male cone production in fascicle cuttings appears to be enhanced by providing relatively high levels of light. The outcomes of this study suggest that a lack of male cone production in young trees may not be the most serious impediment to the breeding program. Instead, the onus may be on the ability to make superior selections at a younger age than occurs at present

    Patents and Competition in the Automobile Industry

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    Systematic evaluation of design choices for software development tools

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    [Abstract]: Most design and evaluation of software tools is based on the intuition and experience of the designers. Software tool designers consider themselves typical users of the tools that they build and tend to subjectively evaluate their products rather than objectively evaluate them using established usability methods. This subjective approach is inadequate if the quality of software tools is to improve and the use of more systematic methods is advocated. This paper summarises a sequence of studies that show how user interface design choices for software development tools can be evaluated using established usability engineering techniques. The techniques used included guideline review, predictive modelling and experimental studies with users

    Psychotherapy and Mental Retardation: What\u27s the Use?

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    The lack of adequate treatment opportunities for mentally retarded people with emotional disturbances has been well documented (11,14,9,16,8,2 1,10,19). A high prevalence of psychopathology, estimated at 4- 5 times that of the non-retarded population (8,10) identifies a population extremely vulnerable to emotional problems. Although advocates from many disciplines, including psychiatry, (15) have worked diligently since the early 20th Century to eliminate massive institutionalization, sterilization, and isolation of the retarded from society\u27s defensive arsenal, the mental healthfield, especially psychiatry, has failed to meet current needs with appropriate clinical services
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