Browsing School of Agriculture & Food Science by Author "Gitonga, NM"
Now showing items 1-14 of 14
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Antibiotic resistance of bacteria isolated from Nairobi River
Budambula, Nancy; Mwachiro, EC; Gitonga, NM (2006)This study aimed to evaluate the antibiotic resistance of bacteria isolated from six sites along the pollution gradient of Nairobi River. Bacteria were isolated by standard Methods and grouped into 3 categories; enteric ... -
Biological nitrogen fixation in selected legumes of the semi-arid Makueni District of Southeast Kenya
Maingi, JM; Shisanya, CA; Gitonga, NM; Hornetz, B (Der Tropenlandwirt-Journal of Agriculture in the Tropics and Subtropics, 1999)The major objective of this study was to investigate biological nitrogen fixation in two main legumes (green gram and common bean) grown in semi-arid southeast Kenya. Nodulation experiments on the two legumes were carried ... -
Cassava production and limitation of propagation through tissue culture
Ogero, Kwame; Gitonga, NM; Ombori, Omwoyo; Ngugi, Michael (Contribution of Agricultural Sciences towards achieving the Millenium Development Goals, 2010)With the unrelenting increase in human population it is important that concerted efforts be made to increase crop productivity so as to match the expected increase in food demand. The gravity of this problem is well ... -
Cost-effective nutrient sources for tissue culture of cassava (Manihot esculenta Crantz)
Ogero, KO; Gitonga, NM; Ombori, O; Ngugi, M (Academic Journals (Kenya), 2012)Application of tissue culture technology is constrained by high costs making seedlings unaffordable. The objective of this study was to evaluate the possibility of using locally available fertilizers ... -
Enhancing farmers’ access to disease-free sweetpotato planting materials through low cost tissue culture for food security and poverty alleviation in Eastern Africa.
Ogero, S K; Mwangi, M; Gitonga, NM; Ombori, O; Ngugi, M (2014)Sweetpotato is a major food staple in Eastern Africa because of its ease of cultivation and ability to thrive in marginal areas. However, limited supply of disease-free planting materials constrains production. Tissue ... -
Ical Nitrogen Fixation: A Case Study of Semi-Arid Soils in SE-Kenya
Gitonga, NM; Shisanya, CA; Hornetz, B (2000) -
Interaction of Phaseolus vulgaris with thermotolerant isolates of Rhizobium leguminosarum biovarphaseoli from Kenyan soils Interaction dePhaseolus vulgaris avec des isolats thermo-tolérants deRhizobium leguminosarum biovarPhaseoli de sols du Kenya
Keya, SO; Widdowson, D; Gitonga, NM (Kluwer Academic Publishers, 1989)Thermotolerant strains of Rhizobium leguminosarum biovarphaseoli were isolated from nodules of Phaseolus vulgaris grown in Kenyan soils, where high soil temperatures often exceed 40°C during sunny days. The isolates varied ... -
Isolation, molecular characterization and evaluation of local isolates of bacillus thuringiensis against the larger grain borer Prostephanus Truncatus (Horn) And The Maize Weevil Sitophilus Zeamais (Motsch)
Gitonga, NM; Songa, JM; Machuka, J; Wamaitha, JM; Maniania, NK; Matilda, A (Kenya Agricultural Research Institute, Nairobi (Kenya), 2006) -
Low technology tissue culture materials for initiation and multiplication of banana plants
Gitonga, NM; Ombori, O; Murithi, KSD; Ngugi, M (African Crop Science Society (Uganda), 2010)Tissue culturing has become a routine method for propagating plants in high technology laboratories. The cost of production using conventional tissue culture is, however, high for most of the countries in the sub-Saharan ... -
A low-cost medium for sweet potato micropropagation
Ogero, KO; Gitonga, NM; Mwangi, M; Ombori, O; Ngugi, M (African Crop Science Conference Proceedings, 2011)Tissue culture has not been optimised in sweet potato (Ipomoea batatas (L) Lam) propagation due to high costs. With an aim of producing affordable disease-free seedlings, a low cost medium was developed and used to ... -
Nitrogen fixation by Vigna radiata L. Wilczek in pure and mixed stands in SE-Kenya
Gitonga, NM; Shisanya, CA; Hornetz, B; Maingi, JM (1999) -
Nodulation and nitrogen fixation in promiscuous and non promiscuous soybean (Glycine max (L.) Merrill) varieties in Eastern Kenya
Gitonga, MN; Gatheri, GW; Cheruiyot, R; Gitonga, NM; Maingi, JM (Kenya Society of Microbiology, 2010)Soil nitrogen deficiency is a major factor limiting soybean production. This problem can be alleviated by the use of nitrogen fertilizers which on the other hand adversely affect the environment, are expensive and ... -
Somatic embryogenesis and plant regeneration from immature embryos of tropical maize (Zea mays L.) inbred lines
Ombori, O; Gitonga, NM; Machuka, J (2008)Somatic embryogenesis and plant regeneration was achieved from immature embryos of six maize (Zea mays L.) inbred lines (CML216, CML78, CML331, TL18, TL27 and MU25). Callus was initiated on N6 medium supplemented with ... -
Variation in nitrogen fixation among three Bush Bean cultivars grown in Kenya when inoculated with three Rhizobia Strains
Gicharu, GK; Gitonga, NM; Hamadi, B; Cheruiyot, R Ch; Maingi, JM (Greener Journal of Agricultural Sciences, 2012)