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Browsing Department of Biological & Physical Sciences by Issue Date

Browsing Department of Biological & Physical Sciences by Issue Date

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  • Effects of Blended Fertilizers on Yields of Mature Clonal Tea grown in Kenyan Highlands 
    Kibet Sitienei 1, 3,4, Hellen W. Kamiri2, Gilbert M. Nduru1, David M. Kamau3, Wilson K. Nyabundi4, Maureen Morogo5 (1-01-20)
    Fertilizer requirement for tea production is high since the pluckable portions are succulent shoots, which contain the largest percentage of nutrients. Kenya’s tea industry depends predominantly on imported compound NPK ...
  • Organic and Mineral Input Management to Enhance Crop Productivity in Central Kenya 
    P. Chivenge, * B. Vanlauwe, R. Gentile, H. Wangechi, D. Mugendi, C. van Kessel, and J. Six (2005-01-01)
    Organic resources (ORs) are important nutrient inputs in tropical agriculture. Combined with mineral fertilizers, they form the backbone of integrated soil fertility management. Th is study was conducted to determine the ...
  • ECOSYSTEMS BASED ADAPTATIONS TO CLIMATE CHANGE ON THE WESTERN SLOPES OF MT KENYA FOREST ECOSYSTEMS KENYA 
    David Karienye 1 , Hellen Kamiri 2 Gilbert Nduru 2 (Springer, Netherlands, 2007-01-01)
    Conversion of natural wetlands to cropped land can have significant impacts on the transformation of soil aggregates and associated nutrients, including soil phosphorus (P). However, little is known about the changes in P ...
  • EFFECTS OF LIGHT INTESITY INTENSITY ON QUALITY OF POTATO SEED TUBERS 
    Esther Gachango, Solomon I. Shibairo, Jackson N. Kabira George N. Chemining’wa Paul Demo (African Journal of Agricultural Research, 2008-09-15)
    Potato (Solanum tuberosum L.) genotypes (Tigoni, Asante and Dutch Robyjn) were evaluated for quality under three light intensities, 612.2 kW (diffused), 1376 kW (direct) and 8 kW (dark) for 12 weeks. Tuber stored in dark ...
  • Do Mixed-Species Legume Fallows Provide Long-Term Maize Yield Benefi t Compared with Monoculture Legume Fallows? 
    James K. Ndufa, * Stanley M. Gathumbi, Hellen W. Kamiri, Ken E. Giller, and Georg Cadisch (2009-11-01)
    Th e deliberate planting of fast-growing N2–fi xing legume monoculture species in rotation with cereal crops can be an important source of N for soil fertility replenishment. We hypothesized that mixed-species fallows ...
  • Classification, Characterisation, and Use of Small Wetlands in East Africa 
    Nomé Sakané & Miguel Alvarez & Mathias Becker & Beate Böhme & Collins Handa & Hellen W. Kamiri & Matthias Langensiepen & Gunter Menz & Salome Misana & Neema G. Mogha & Bodo Maria Möseler & Emiliana J. Mwita & Helida A. Oyieke & Mark T. van Wijk (2012-08-20)
    Small wetlands in Kenya and Tanzania cover about 12 million ha and are increasingly converted for agricultural production. There is a need to provide guidelines for their future protection or use, requiring their systematic ...
  • COMPARATIVE ANALYSIS OF PHENOTYPIC CHARACTERIZATION OF KENYA AND PACIFIC ISLANDS TAROGEN GERMPLASM COLLECTIONS COLOCASIA ESCULENTA L. (SCHOTT) AKWEE PE1, NETONDO G2, PALAPALA VA3 
    Akwee, PE; Netondo, G; Palapala V A, (Scientia Agriculturae www.pscipub.com/SA, 2014-12-17)
    Fifty accessions of taro germplasm collections Colocasia esculenta L. (Schott) were collected from Kenya and Pacific Islands tarogen germplasm collections. Twenty five accessions of Kenyan taro germplasm were collected ...
  • NUCLEON-NUCLEON INTERACTION IN INFINITE NUCLEAR MATTER 
    Chelimo L.S. 1 , Khanna K.M. 1 , *Sirma K.K. , Tonui J.K. , Korir P.K., Kibet J.K. , Achieng A.J and Sarai A. (International Journal of Physics and Mathematical Sciences, 2015-03-01)
    The thermodynamic properties of Rhenium ( 75Re 186 ) using Nucleon-Nucleon (NN-Interaction) via a scattering potential 𝑉 = 𝛽𝜒 3 + 𝛾𝜒 4 in addition to the unperturbed Hamiltonian Ho is studied. The second quantization ...
  • PROPERTIES OF A MIXTURE OF BOSONS AND FERMIONS AT VERY LOW TEMPERATURE 
    Chelagat, I., *Tanui, P.K., Sirma K. K., Murunga G.S., Cheruiyot W.K., Khanna, K.M., Tonui, J.K., & Chelimo L.S., (International Journal of Latest Engineering Research and Applications (IJLERA), 2016-03-07)
    Properties of a mixture of bosons and fermions at low temperature have been studied when the mixture is enclosed in a trap. Gross-Pitaevskii mean field equation for the boson distribution in the trap is solved by utilizing ...
  • EVALUATION OF POLYMORPHISM GENERATED BY SINGLE SEQUENCE REPEAT MARKERS IN SELECTED TARO POPULATIONS 
    Valerie A. P, Palapala; Edome Peter, Akwee (Journal of Medical and Biological Science Research, 2016-08-03)
    Fifty cultivars were evaluated using six SSR primer combinations. Significant polymorphic variations within the Kenyan and Tarogen taro sub-populations were revealed. A total of 64 alleles were detected with sizes from 99 ...
  • PHASE TRANSITION IN SUPERCONDUCTORS 
    K. K. Sirma, J. R. Faith, K.M. Khanna and L.S.Chelimo (International Journal of Advanced Research, 2016-08-19)
    Phenomena of phase transition are a possible consequence of molecular interaction as in ordinary matter and superfluid systems, such as liquid, or electrons and nucleons interaction. These interactions are believed to be ...
  • PHASE TRANSITION IN SUPERCONDUCTORS 
    K. K. Sirma, J. R. Faith, K.M. Khanna and L.S.Chelimo (International Journal of Advanced Research, 2016-08-19)
    Phenomena of phase transition are a possible consequence of molecular interaction as in ordinary matter and superfluid systems, such as liquid, or electrons and nucleons interaction. These interactions are believed to be ...
  • GENETIC STRUCTURE AND GEOGRAPHICAL RELATIONSHIP OF SELECTED COLOCASIA ESCULENTA [L. SCHOTT] GERMPLASM USING SSRS 
    Valerie A. P., Palapala; Edome Peter Akwee (Journal of Advances in Biology & Biotechnology 10(3): XX-XX, 2016; Article no.JABB.28479, 2016-10-17)
    Aims: SSR markers were used to infer population genetic structure variability in taro cultivars with the objective of characterizing the allelic diversity of each geographical population. Place and Duration of Study: ...
  • Evaluating the effect of plant population densities and nitrogen application on the leaf area index of maize in a reclaimed wetland in Kenya 
    Catherine Waithira NJUGUNA, 1 Hellen Wangechi KAMIRI, 2 John Robert OKALEBO,1 Wilson NGETICH,1 Syphilline KEBENEY1 (2016-10-30)
    Maize is the main staple food in Kenya with over 90% of Kenyans relying on it. While the annual national consumption is increasing, the production of this crop has been on the decline in the last two decades. Maize ...
  • PHASE TRANSITION IN 40 20Ca AND 46 20Ca 
    K.K. Sirma, J.R. Faith and W.K Cheruiyot (International Journal of Advanced Research, 2016-12-01)
    Thermodynamic properties of 40,20Ca and 46 20Ca have been calculated using an intergrated nuclear model substituted into the specific heat capacity formula. The transition temperature is obtained from the graphs ...
  • ROLE OF LONG – RANGE ELECTRON - PHONON AND COULOMB INTERACTIONS IN HIGH - TCCUPRATE SUPERCONDUCTORS 
    Tanui, P.K., Khanna, K.M.,Tonui, J.K., Murunga G.S.W., Chelimo L.S., Chelagat, I., Sirma K. K.,&Cheruiyot W.K. (International Journal of Latest Engineering Research and Applications (IJLERA), 2017-04-04)
    The effect of electron – phonon and Coulomb interactions between charge carriers on the properties ofcuprate superconductors, has been studied. The expectation value of the Hamiltonian was evaluated using second quantization ...
  • CRYSTALLIZATION OF NEUTRON MATTER (NEUTRON STARS) 
    Murunga, G. S., *Tanui, P.K.,Tonui, J. K.,Khanna, K. M., Chelimo L.S., Chelagat, I., Sirma K. K. and Cheruiyot W. K. (International Journal of Latest Engineering Research and Applications (IJLERA), 2017-06-06)
    A neutron star is the collapsed core of a large (10 – 29 solar masses) stars. Neutron stars can be considered as reservoirs of high-density fermions, as these systems can be assumed to be the largest of its type in the ...
  • EFFECT OF FARMYARD MANURE, LIME AND INORGANIC FERTILIZER APPLICATIONS ON SOIL PH, NUTRIENTS UPTAKE, GROWTH AND NODULATION OF SOYBEAN IN ACID SOILS OF WESTERN KENYA 
    Hillary M. O. Otieno , George N. Chemining’wa Shamie Zingore (Canadian Center of Science and Education, 2018)
    Soybean is an important crop with nutrition, economic and soil fertility improvement benefits to farmers. However, its production in western Kenya is partly constrained by low soil pH and soil fertility levels. A greenhouse ...
  • GENETIC DIVERSITY ANALYSIS OF KENYAN TARO [COLOCASIA ESCULENTA (L.) SCHOTT] ACCESSIONS USING SSR MARKERS 
    Valerie A. P, Palapala; Edome Peter, Akwee (Sky Journal of Agricultural Research Vol. 5(5), pp. 076 - 086, July, 2016, 2018-07-08)
    were used to characterize 25 taro genotypes of Kenya. A total of 30 polymorphic alleles were generated. The number of alleles per locus ranged from 1 to 6 alleles, with an average of 3.0425 alleles across 18 loci obtained ...
  • Nutrient Budget and Economic Assessment of Blended Fertilizer Use in Kenya Tea Industry 
    Kibet Sitienei , 1,2 Hellen W. Kamiri,3 Gilbert M. Nduru,1 and David M. Kamau4 (2018-10-01)
    Kenya’s tea industry depends predominantly on imported compound NPK fertilizers to replenish nutrients removed through plucking. 'ese fertilizers cannot be easily manipulated for specific soils and tea clones. 'ey also ...

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