A5029840963- Rangeland Management and Livestock Ecology
- Ruminant Nutrition and Digestive Physiology
- Agriculture Sustainability and Environmental Impact
- Energy and Environment Impacts
- Effects of Environmental Stressors on Livestock
- Genetic and phenotypic traits in livestock
- Agricultural Innovations and Practices
- Toxic Organic Pollutants Impact
- Atmospheric and Environmental Gas Dynamics
- Aquatic Ecosystems and Biodiversity
- Environmental Impact and Sustainability
- Agricultural Economics and Policy
- Agricultural Systems and Practices
- Soil erosion and sediment transport
- Agriculture and Rural Development Research
- Agricultural risk and resilience
- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Reproductive Physiology in Livestock
Maseno University
2012-2023
International Livestock Research Institute
2017-2023
The University of Melbourne
2023
University of Hohenheim
2017-2021
Moroccan Agency For Solar Energy (Morocco)
2012
In Africa, the agricultural sector is largest of domestic economy, and livestock, are a crucial component agriculture, accounting for ~ 45% Kenyan GDP > 70% African greenhouse gas (GHG) emissions. Accurate estimates GHG emissions from livestock required inventory purposes to assess efficacy mitigation measures, but most rely on TIER I (default) IPCC protocols with major uncertainties coming methodology itself. Tier II represent significant improvement over default methodology, however in...
Abstract Aims Decomposition of manure deposited onto pasture from grazing animals represents an important process for carbon (C) and nitrogen (N) cycles in grassland systems. However, studies investigating decomposition are scarce; especially sub-Saharan Africa (SSA). Methods In this study, we measured three types animal (cattle, sheep, goat) over >1 year using litter bags at four climatically different sites across Kenya. Results Manure dry matter, total C, N ammonium concentrations...
Abstract Roasted meat is known to be a major source of human exposure PAHs. The contribution direct-heat charcoal-roasted, electric- oven grilled, and shallow-pan fried in Kisumu City was not although the three modes cooking are very prevalent. This study analyzed concentrations PAHs raw beef, goat meat, pork, investigated effect charcoal roasting, electric-oven grilling, frying on these concentrations, compared their concentration levels with international standards for foods order assess...
Measurement of liveweight stock is one the most important production tools available to farmers – playing a role in nutrition, fertility management, health and marketing. Yet sub-Saharan Africa do not have access scales on which weigh cattle. Heart girth measurements (and accompanying algorithms) been used as convenient cost-effective alternative scales, however despite plethora studies extant literature, accuracy sensitivity such measures are well described. Using three datasets from...
The study aimed at quantifying seasonal and spatial variations in availability nutritive value of herbaceous vegetation on native pastures supplement feedstuffs for domestic ruminants Western Kenya.Samples pasture (n = 75) local 46) cattle, sheep, goats were collected 20 villages three geographic zones (Highlands, Mid-slopes, Lowlands) Lower Nyando, Kenya, over four seasons one year. Concentrations dry matter (DM), crude ash (CA), ether extract (EE), protein (CP), neutral detergent fibre...
Context African livestock play a critical role in food security and the wider economy, while accounting for >70% of agricultural greenhouse gas emissions. Accurate estimates emissions from are required inventory purposes to assess efficacy mitigation measures. While there is an increasing number studies assessing methane (CH4) cattle, little attention has been paid small ruminants (SR). Aims Enteric CH4 were assessed 1345 SR three counties western Kenya develop more accurate emission...
Low crop yields (below 1 t$
Abstract Most Sub-Saharan countries still rely on the basic Intergovernmental Panel Climate Change's (IPCC) Tier 1 methodology for reporting greenhouse gas (GHG) emissions from their livestock sector. This approach is, however, associated with high uncertainty and cannot detect changes in GHG resulting mitigation interventions. The present study aimed to quantify effect of replacing IPCC 2 approaches assessing total farmgate products' emission intensities (EIs) smallholder cattle production...
Highlights• Use of Tier 2 resulted in 19-25% lower total GHG emissions compared to 1.• Using locally measured methane yield instead the defaults emission estimates.• Energy allocation method results milk EI using protein output.