School of Biological and Physical Science: Recent submissions
Now showing items 681-700 of 933
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Quality response of clonal black tea to nitrogen fertiliser, plucking interval and plucking standard
(John Wiley & Sons, Ltd., 2000)Variations in the black tea quality of high‐yielding clone S15/10 in response to rates of NPKS 25:5:5:5 fertiliser of 200 and 400 kg N ha−1 year−1, plucking intervals of 7, 14 and 21 days and a selective plucking standard ... -
A Measure of Economic Rationality in the Smallholder Tea Sub-Sector in Kenya
(Department of Agricultural Economics; University of Nairobi., 2001)The smallholder tea sub-sector in Kenya is considered the largest and one of the most successful smallholder schemes in the world. However, tea productivity in this sub-sector has been persistently low when compared with ... -
Effects of fertilisers on tea yields and quality: A review with special reference to Africa and Sri Lanka.
(Tea Research Foundation of Kenya, 2001)Introduction the increase in world demand, consequently tea Camellia sinensis L. 0 . Kuntze plants are commercially grown under different climatic conditions with latitudes ranging from 49' N (Outer Carpathians) to 33' S ... -
A test for relative efficiency in the Smallholder Tea Sub-sector in Kenya
(Department of Agricultural Economics; University of Nairobi., 2001)Despite availability of tea growing technologies to all Kenya tea farmers, green leaf production in smallholder sub-sector remains low. Tea in Kenya is grown in the East of the Rift Valley and the West of the Rift Valley ... -
Gender Analysis of Economic Efficiency in Smallholder Tea Production in Kenya
(Eastern Africa Agricultural Economics Society,1979, 2003)If the productivity of tea among the smallholders can only increase to about 2500 kg/ha/yr, the national projection of 300 thousand metric tones would be realized without the need to allocate more land to tea enterprise. ... -
Tea
(Oxford, 2003)This article focuses on the process of tea fermentation. Tea beverages are processed from the young tender shoots of Camellia sinensis L. O. Kuntze. Because of its subtle flavors and health benefits, tea has become the ... -
Long term effects of nitrogenous fertilizers on tea yields, nutrients uptake and some soil chemical properties
(Soil Science Society of East Africa, 2005)A field experiment was set up to determine long tenn responses of different rates of nitrogen fertilizers namely used in tea, N~KS 25:5:5:5 and NPK 20: 10: 10, on tea 'Ields, nutrient uptake and soil chemical properties. ... -
Assessment of Constraints in Technology Transfer System and Policies which Limit the Realisation of High Green Leaf Production in the Smallholder Tea Sector of the Kenya Tea …
(African Technology Policy Studies Network (ATPS), 2005-01-01)Technological recommendations for maximizing green leaf production have been made available to smallholder farmers by the Tea Research Foundation of Kenya (TRFK) through various publications. Indeed TRFK has released ... -
Sustainability of smallholder tea growing in Kenya
(2007)Although tea was introduced in Kenya in 1903, Africans (natives) were barred from growing the crop until after independence in 1963 when the legislation was repealed. Africans started growing tea under the smallholder tea ... -
NPK (S) fertilizer use in commercially cultivated clone BBK 35 in different tea growing regions of Kenya: I. Experimental design and initial soil chemical properties.
(Tea Research Foundation of Kenya, 2008)An experiment was set up in five sites by superimposing on commercially grown plantations consisting of one popular tea cultivar, clone BBK 35 at Timbilil estate, Kericho; Changoi Estate, lower Kericho; Magura-Kipkebe ... -
NPK (S) fertilizer use in commercially cultivated clone BBK 35 in different tea growing regions of Kenya: II. Effects of nitrogen rates and plucking intervals on soil chemical …
(Tea Research Foundation of Kenya, 2008)One commercially and widely grown tea cultivar, clone BBK 35 was evaluated for changes in soil chemical properties at different N-fertilizer rates and plucking rounds in five different localities in Kenya. The soils in all ... -
The role of Kenya Tea Development Agency Limited in the small-scale tea holder development in Kenya.
(International Society of Tea Science, 2008)The Kenya Tea Development Authority (KTDA) was formed in 1964 to take over the functions of the Special Crops Development Authority (SCDA), which had been set in 1960 to promote tea growing by indigenous Kenyans (Africans). ... -
Long term fertilizer use on high yielding clone S15/10: Tea yields
(International society of tea science, 2008)High production of young tender shoots of Camellia sinensis L. O. Kuntze to make tea beverages leads to soil nutrients depletion through harvested crop and leaching. The production can be sustained by replenishing the lost ... -
Productivity and nitrogen use of tea plantations in relation to age and genotype
(Elsevier, 2008-07-11)Lack of science-based knowledge on responses of tea bushes to nitrogen (N) in ageing tea plantations hampers the development of ecologically sound and economically profitable N-management strategies. It is hypothesized ... -
Effects of water stress on growth and water relations of young grafted tea.
(Tea Research Foundation of Kenya, 2009)The effects of soil water stress on some physiological parameters and dry matter partitioning (dm) were studied in grafted tea plants (Camellia sinensis L.) grown in containers and subjected to adequate and reduced water ... -
Responses of clonal tea to location of production and plucking intervals
(Elsevier, 2009-07-01)Tea is cultivated in diverse environments causing yield and quality differences in its beverages. To maximise yields and quality, agronomic practices should be optimised. But agronomic recommendations are uniform in different ... -
Anti-plasmodial and larvicidal effects of surface exudates of Gardenia ternifolia aerial parts
(University of Nairobi, 2010)Various parts of Gardenia ternifolia (leaves, roots and stem bark) have been reported by traditional healers as a remedy against malaria fever. The aerial parts are coated with shiny materials rich in flavonoid aglycones. ... -
Changes in soil chemical properties and leaf nutrients content in tea due to nitrogen fertilizer rates and application intervals.
(Tea Research Foundation of Kenya, 2010)Tea (Camellia sinensis (L.) O. Kuntze) plant, requires much more nitrogen than most of the other nutrients for its growth, development and sustainability of harvestable crop. Soil as a resource of plant nutrients, cannot ... -
SURVEY OF SWEET POTATO VIRUSES IN WESTERN KENYA AND DETECTION OF CUCUMBER MOSAIC VIRUS
(2010)Sweet potato is an important food crop worldwide, but several pests and diseases limit its production. In eastern Africa, virus-induced diseases rank second to weevils in causing yield reduction. Symptomatic sweet potato ... -
Development of a multiplex PCR technique for simultaneous detection of Sweet potato feathery mottle virus and Sweet potato chlorotic stunt virus
(An International Journal of the Italian Phytopathological Society, 2010-07-01)Virus diseases, especially those caused by mixed infections, are among the economically most devastating diseases of sweet potato. Sweet potato virus disease (SPVD), which is caused by mixed infection of Sweet potato ...