Stephen Ahenda

PhD Student
PhD student Stephen Ahenda

My role

As a PhD candidate in agriculture and environmental studies, my research explores the role of free-living nematodes (FLN) in nutrient cycling and soil health, with a specific focus on their contributions to nitrogen transformations and carbon turnover in dryland agroecosystems.

My background

With a strong foundation in analytical chemistry and soil science, I apply advanced techniques to assess soil fertility, irrigation water quality, and agro-input quality and safety. My work supports evidence-based recommendations for sustainable agriculture, food security, and environmental protection.

Projects

  • Soil Fauna Ecology (current)
  • Trace Contaminant Detection (Heavy Metals and Pesticide Residues) in Food and Soil from Flower-Growing Regions in Kenya (completed)
  • Agro-Input Quality and Mycotoxin Surveillance in Cereals for Smallholder Farmers across Kenya (completed)
  • Soil Fertility Mapping and Irrigation Water Suitability in Maize Producing Regions in Kenya (completed)
  • Evaluation of Biogas Slurry and Biodegraded Organic Waste as an Alternative Organic Fertilizer (completed)

Key expertise

Soil fertility assessment and nutrient management, nematode community analysis and ecological interpretation, analytical instrumentation, agro-input quality control 

Qualifications

PhD in Agriculture and Environmental studies (ongoing)

MSc. Environmental Chemistry, University of Nairobi

BSc. Chemistry, University of Nairobi

Post Grad. Diploma in Microbial Food Quality and Safety, University of Copenhagen