Geoffrey W. Khamala; John W. Makokha; Churchill Wanyera; Kanike Raghavendra Kumar; Mansour Almazroui; Pelati Althaf; Aqil Tariq(King Abdulaziz University and Springer Nature Switzerland, 2026-05-20)
The Cloud Area Fraction (CAF) and Cloud Radiative Effect (CRE) are among the key metrics for understanding Earth’s climate, as they modulate shortwave and longwave radiation. This study, therefore, analyzes the vertical ...
Yonah Situma; John W. Makokha; Geoffrey W. Khamala; Kanike Raghavendra Kumar; Richard Boiyo; Geoffrey W. Khamala, Geoffrey W. Khamala(Journal of Atmospheric and Solar-Terrestrial Physics, 2026-01-19)
Accurate identification and classification of atmospheric aerosols remain a significant challenge across Africa, limiting the precise assessment of their climatic effects. This study presents a comprehensive analysis of ...
Yonah Situma; John W. Makokha; Peter N. Khakina; Geoffrey W. Khamala; Kanike Raghavendra Kumar; Richard Boiyo(Journal of Atmospheric and Solar-Terrestrial Physics, 2026-06-19)
Accurate identification and classification of atmospheric aerosols remain a significant challenge across Africa,
limiting the precise assessment of their climatic effects. This study presents a comprehensive analysis of ...
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 ...
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 ...
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 ...
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 ...
Ashiono F.1*, Kamiri H.W.2, and Kinyanjui M.3(2019-03-01)
Forest soil is the convectional growth media used in raising seedlings in tree nurseries in Kenya. Poor growth media in tree nursery establishment has been reported as the major cause of poor seedling establishment in the ...
Joseph M. Karienye1* , Tom Ouna1 , Hellen Kamiri2(2019-10-06)
The future of African agriculture depends on the outcome of climate and specifically on rainfall variability. In arid and semi-arid areas, the impacts of rainfall variability can be adverse especially where the main farming ...
Kibet Sitienei 1, 3,4, Hellen W. Kamiri2, Gilbert M. Nduru1, David M. Kamau3, Wilson K. Nyabundi4, Maureen Morogo5(2019-01-01)
Food production among rural farmers globally has been threatened by climate variability impacts leading to food scarcity. Small holder farmers face challenges in the choice of appropriate adaptive mechanisms when responding ...
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 ...
Mathias Becker1 Kai Behn1 Gereon Heller1, 3 Hellen W. Kamiri1,2(2024-10-14)
Background: For 20 years, Prosopis juliflora is aggressively spreading throughout the “Njemps Flats” in Kenya, where it changes
vegetation cover and affects pastoral livelihoods. Its invasion dynamics is related to shallow ...
Kibet Sitieneia, c, d*, Hellen W. Kamiri b , Gilbert M. Nduru a , David M. Kamau c , Wilson K. Nyabundid and Maureen Morogoe(2018-10-02)
Kenya’s tea industry depends predominantly on imported NPK fertilizers
to replenish nutrients removed through plucking. In this respect, two
blended fertilizers containing NPKS 25:5:5:4+9Ca+2.6Mg and NPKS
23:5:5:4+10Ca+3Mg ...
Samuel Musah, Rael Birithia, Hellen Kamiri, Esther Kahariri(2025-01-30)
The widespread occurrence of potato bacterial wilt significantly contributes to the reduced potato yields in Kenya. Implementing effective management strategies for this disease usually necessitates understanding the ...
D. M. Kinyumu H. W. Kamiri P. W. Mathenge(AJOL, 2023-11-06)
A study to determine the effects of farming systems on spatial and temporal variability of soil bulk density, soil organic carbon and soil moisture was carried out in lowland areas of Laikipia during 2019 and 2020 cropping ...
This study evaluated the soil total organic carbon (TOC) and pH within Iveti forest, Machakos Kenya and the adjacent farmlands to determine variability among forest stands and adjacent agricultural fields. A total of 39 ...
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 ...
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 ...
Neema Mogha1, Collins Handa2 , Miguel Alvarez3 , Bodo Möseler3 , Hellen Kamiri4(2023-01-01)
In East Africa, demographic growth, inter-generational inheritance of land, increasing land
scarcity in the highland areas, degradation of upland soils and inter-annual rain variability is increasing cropping pressure on ...
ONUNGA, JEREMIAH,PAUL,SHARONODONGO,ANYANGO(INTERNATIONAL JOURNAL OF RESEARCH AND SCIENTIFIC INNOVATION (IJRSI), 2025-01-20)
A health information system is a structured effort to systematically collect, store, and share data essential to the
effectiveness of a health system, encompassing various health-related functionalities. Gathering, ...