Browsing School of Agriculture and Food Science by Issue Date
Now showing items 1-20 of 172
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Farmers' preferences for methods of receiving information on new or innovative farming practices
(Journal of Agricultural Education, 1989) -
Estimated Economics of theileriosis control in Africa.
(Elsevier B.V., 1992)Theileriosis, caused by the parasite Theileria parva, leads to considerable economic losses in cattle in Burundi, Kenya, Malawi, Mozambique, Rwanda, Sudan, Tanzania, Uganda, Zaire, Zambia and Zimbabwe. These losses have ... -
Collection and evaluation of Kenyan tomato landraces with special reference to salt and drought tolerance
(AGRIS, 1995)The tomato is a major vegetable species in Kenya. By providing salt and drought tolerant varieties, their productivity in the marginal areas of Kenya could be significantly improved. The aim of this work was to collect ... -
Assessment of tolerance to salt stress in Kenyan tomato germplasm
(International Journal of Plant Breeding, 1997)Tomato is an important vegetable crop in Kenya and the development of salt tolerant cultivars would enhance its productivity in the vast marginal areas of the country. This study was aimed at determining the magnitude of ... -
Spot observation: advantages and disadvantages for household time use research
(Journal of Family and Economic Issues, 1998)The spot observation method of estimating time use is described in this article. Procedures for using this method in developing countries, where household activities are relatively easily observed, are contrasted with ... -
An assessment of the economic impact of heartwater (Cowdria ruminantium infection) and its control in Zimbabwe.
(Elsevier B.V., 1999)Heartwater, caused by the rickettsial organism Cowdria ruminantium, is a serious constraint to livestock development in much of sub-Saharan Africa. Traditionally, the disease has been controlled by the use of chemical ... -
Restoration of Male Fertility in Seasonally Dependent Male Sterile Mutant Tomato, Lycopersicon esculentum cv. First
(Journal of the Japanese Society for Horticultural Science, 2000)The effect of environmental conditions in the spring and autumn on the restoration of male fertility in T-4 male sterile mutant plants which were obtained via gamma (γ)-irradiation of tomato cv. First was investigated. ... -
Lactation characteristics of Dutch Friesian cows under semi-arid conditions of Kenya: 305-day yield and lactation length.
(AJOL, 2001)Data on 871 calving and lactation records of Dutch Friesian cows in their second parity and above kept at the National Animal Research Centre, Naivasha were analyzed to investigate the effects of year and season of calving, ... -
Aluminium tolerance of four bean (Phaseolus vulgaris L.) varieties
(African Journals Online, 2002)Four bean (Phaseolus vulgaris) varieties (‘Rosecoco'– GLP 2, ‘Mwitemania'– GLP X 92, ‘Mwezi Moja' – GLP 1004, and French bean – ‘Amy') locally obtained from seed merchants in Kenya were investigated for their aluminium ... -
Biochemical differentiation in Camellia sinensis and its wild relatives as revealed by isozyme and catechin patterns
(Pergamon, 2002-12-10)The variation in three NADP-linked dehydrogenase enzymes; glucose-6-phosphate dehydro- genase, 6-phosphogluconate dehydrogenase and shikimate dehydrogenase as well as alpha and beta esterases was determined in 24 cultivars ... -
Response of tomato genotypes to induced salt stress
(African Crop Science Society, 2003-12-31)Thirteen tomato (Lycopersicon esculentum L.) genotypes were subjected to salt treatment under hydroponics and their responses monitored in a set of two experiments with the objective of advancing them as potential salt ... -
The use of catechins as biochemical markers in diversity studies of tea (Camellia sinensis)
(Kluwer Academic Publishers, 2004-04)The concentrations of catechins in a Kenyan tea germplasm collection of 102 accessions were determined by HPLC. Total green leaf catechin concentrations and the ratio of dihydroxylated to trihydroxylated catechins were ... -
Non-genetic causes of the heterogeneity of variance in milk yield among Holstein-Friesian Herds in Kenya.
(AJOL, 2005)Lactation records of Holstein- Friesian cows in Kenya made during the period 1968 to 1984 were analyzed for the cases of heterogeneity of variance in milk yield among herds using a fixed effect least squares model. Year, ... -
Effects of Acid Scarification, Priming with PEG, NaCI or Sea Water as Osmoticum and Dehydration on Spinach Seed Germination at 30°C
(Japanese Society for Horticultural Science, 2005)Spinach (Spinacia oleracea L.) seeds were scarified with an 18 N H2S04 solution, then primed for one week at 10De in PEG- 6000, NaCl or natural sea water. Germination tests were carried out at 30De, which is normally ... -
The rate of outcrossing in grain Amaranths
(John Wiley, 2006-04-28)Studies of intra specific and inter specific out crossing rates were carried out for grain amaranths using two populations of A. hypochondriacus (populations 1008 and 1024) and two populations of A. cruentus (populations ... -
Plant growth, water relations and transpiration of two species of African nightshade (Solanum villosum Mill. ssp. miniatum (Bernh. ex Willd.) Edmonds and S. sarrachoides Sendtn.) under water-limited conditions
(Elsevier, 2006-09)The adaptation to drought stress of two African nightshade species, Solanum villosum and S. sarrachoides was investigated in pot and field experiments between 2000 and 2002. Two genotypes of S. villosum (landrace and ... -
Plant growth, water relations and transpiration of two species of African nightshade (Solanum villosum Mill. ssp. miniatum (Bernh. ex Willd.) Edmonds and S. sarrachoides Sendtn.) under water-limited conditions
(Elsevier B.V., 2006-09-11)Solanum villosum is an important leafy vegetable in Kenya whose production faces low yields. Two potentially high leaf-yielding genotypes of S. villosum, T-5 and an octoploid have been developed. Field experiments were ... -
Polyploidy Breeding of African Nightshade ( Solanum section Solanum )
(Global Science Books, 2007)The perception of African nightshades ( Solanum section Solanum ) as “healthy” foods, supported by documentation of their high nutri- tional and medicinal benefits, has led to a sudden and ... -
Effects of day-length and temperature on floral structure and fertility restoration in a season-dependent male-sterile Solanum villosum Mill. mutant
(Springer Verlag, 2007)Solanum villosum is an important African leafy vegetable whose yield is limited mainly by competition from early and excess fruit-set. Induced male-sterility is a potential tool to reduce this competition and enhance yields. ... -
Floral Genetics of African Nightshade (Solanum section Solanum)
(International Journal of Plant Developmental Biology, 2007)Solanum section Solanum, centering on the species commonly known as African nightshade, and botanically known as the “Solanum nigrum complex” is composed of a large number of morphogenetically distinct taxa, with certain ...
