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morrisTrevor Morris was born on the 11th April 1930 and educated at the Rendcomb College, Cirencester Glos (England). He graduated from the University of Reading in 1951 and was awarded the Doctorate of Philosophy by Reading University in 1966. He was made a doctor of Science at the same university in 1981.


Dr Morris has been responsible for teaching and research in Poultry Science and Poultry Production at his university since 1954. During the years of 1981-1984 Dr Morris was professor of Agriculture and since 1984 Professor in Animal Production and head of the Department of Agriculture and Horticulture at the University of Reading.
Beside his work in teaching and research Dr Morris has also been involved in a number of extramural offices. He has supported the WPSA organisation being elected Council Member (1962-74) and President of the UK Branch (1974-78). He was elected Vice President of WPSA in Helsinki in 1985. He has been Council Member (1963-81) and Editorial Board Member (1971-75) of British Poultry Science Ltd. From 1968-75 he was Technical Secretary to the Agricultural Research Council's Working Party on Nutrient Requirement of Poultry, and from 1979-85 Chairman of Director's Advisory Committee, ARC Poultry Research Centre, Edinburgh.
Dr Morris has been an outstanding scientist for more than 25 years, covering a wide field in poultry science. He has alone and together with co-workers published more than a hundred scientific papers with high practical application on physical environmental factors and nutrition and on interactions between them.
Great importance to practical egg production is attached to Dr Morris's work on photoperiodic responses in the fowl. Trevor Morris started this important work in conjunction with Syd Fox and developed modern light programmes between 1960 and 1970.
These programmes, involving artificial lighting and light proof poultry houses, have enabled poultry keepers to raise chicks and maintain high egg production without interference from seasonal day length changes. This practical application of light programmes is of vital importance for achieving uniform egg production, especially in countries with extreme variation in the natural light-dark cycle during the year.
In connection with Morris's and Fox's fundamental light programme research it should also be mentioned that as early as the id 1960s they had begun to use advanced automatic data recording to monitor time of oviposition in laying fowl. This made it possible to pick up information that would have been unobtainable in the ordinary way with manual recording. At the same time the data were more precise and subject to fewer errors.
Many papers from Dr Morris and co-workers are studies on the interaction of energy and protein content in diets and environmental temperatures.
They have shown that factors affecting feed intake, like energy level of diets and environmental temperature, must be related to the concentration of nutrients in the diet used.
The main field of Dr Morris on the nutritional side, however, is his participation in development of response curves and mathematical models for requirements of protein and amino acids. An important approach to the problem is the Reading model of 1973. From such models the nutritionists can estimate the rate at which poultry in a well defined nutritional and environmental context will respond to increasing inputs of amino acids. With information on marginal cost and marginal revenue it is possible to calculate the optimum input. Such approaches to nutritional requirements will certainly be of more common use in the future.
Dr Morris has a particularly clear presentational style, both in his scientific papers and as a lecturer. He also has an open minded personality with a good sense of humour and an easy way to communicate verbally with his co-workers and visitors. All this has made Dr Morris a respected and popular person to all those who have benefited from his great knowledge in almost all fields of poultry science.

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