Ruth is the soil scientist for The Nature Conservancy’s Africa Region. She leads the TNC’s Africa work on agriculture-soil-climate interactions, sustainable intensification, climate-smart agriculture, multifunctional landscapes, and food systems analysis and planning.
She works with farmer networks for the deployment of soil condition diagnostic and leads a participatory process to identify suitable agricultural soil management recommendations and put in place appropriate monitoring frameworks. Through improvements in soil health practices, she contributes to farmers’ livelihoods resilience and help to mitigate climate change.
Ruth helps farmers to grow more food on less land under the new TNC-led soil health training program. In the upper Tana region in central Kenya, she has worked to test soils and provided tailored recommendations on treatments and practices to improve the soil health of more than 150 farmers. In the IHEMI cluster of Iringa and Njombe regions of Southern Tanzania, she has worked with smallholder farmers to improve their land’s soil health and drive sustainable intensification.
Her training is in the management of agroecosystem and environment with a master of soil science from the University of Nairobi. Her previous work focused on the quality assurance program of the agriculture sector that affects the whole chain of agriculture, food, and life from soil to folk. She led soil health projects through which farmers in western Kenya had their soils analyzed and corrective measures recommended. She has published articles in scientific journals on integrated soil fertility management and soil carbon stocks.
Ruth C. Sitienei, Richard N. Onwonga, Joyce J. Lelei, Peter Kamoni. (2017). Use of Dolichos (Lablab Purpureus L.) and Combined Fertilizers enhance Soil Nutrient Availability, and Maize (Zea Mays L.) Yield in Farming Systems of Kabete sub-County, Kenya. Agricultural Science Research Journal Vol. 7(2): 47 – 61.
Richard N. Onwonga, Ruth C. Sitienei, Joyce J. Lelei, Peter Kamoni. (2020). Complementary Effects of Legume Integration and Fertilizer Application on Soil Moisture and Long-term Carbon Stocks in Maize Systems of Kabete Sub-County, Kenya. Tropical and Subtropical Agroecosystems Journal.