James Kinyangi

Dr. James Kinyangi holds PhD (Cornell) and MSc (Michigan State University) degrees in Crop and Soil Sciences.

Before joining CCAFS, he was Production Advisor for the Food and Agriculture Organization of the United Nations. As an adviser, he initiated work on the development of agricultural water infrastructure and testing production technologies that benefit smallholder farmers and vulnerable communities in Swaziland.

Prior to that, he worked at ILRI on the CPWF Basin Focal Projects, leading water and poverty analyses in the Nile basin and also conducting an IDRC-DFID-CCAA commissioned regional study on vulnerability to climate change and climate variability. In addition, he consulted as a project development expert, assisting AGRA program grantees in seven countries on the preparation of funding requests to the Soil Health Program.

From 2000 to2003, he assisted to manage partnerships of soils and agronomic research involving more than 100 TSBF-AfNet scientists in 13 countries. He was responsible for strengthening NARES partner skills in the application of APSIM and CENTURY models, as well as the NUTMON Toolbox to investigate nutrient balances in crop-livestock systems

Under the US-NSF program on bio-complexity in the environment, he conducted investigations into human and biophysical influences on tropical and temperate ecosystems. He worked with advanced synchrotron radiation sources, developing novel applications to advance present understanding of global biogeochemical cycles.

He has written research articles on global change, ecosystem science, soils and land management in the tropics. Among his key contributions are the development of spatial x-ray pattern analyses for soils and the publication of pioneering work on the first nanometer scale image of soil.

In 2007, he served as a post-doc for the soil biogeochemistry laboratory at Cornell University, teaching graduate and undergraduate courses on nutrient management in agro-ecosystems.


Some recent publications

Solomon, D., Lehmann, J.; Kinyangi, J; Machado, S; Knoth de Zarruk K; and Liang; B. (2010). Speciation, long- and short-term molecular-level dynamics of organic sulfur studied by XANES spectroscopy. Journal of Environmental Quality In press

Solomon D, Lehmann J, Kinyangi J, Pell A, Theis J, Riha S, Ngoze S, Amelung W, du Preez C, Machado S, Ellert B and Janzen H. (2009). Anthropogenic and climate influences on biogeochemical dynamics and molecular-level speciation of sulfur in temperate, subtropical and sub-humid tropical ecosystems. Ecological Applications 19 (4): 989-1002

Nguyen B T, Lehmann J, Kinyangi J, Smernik R, Riha S J, and Engelhard M H (2009). Long-term black carbon dynamics in cultivated soil. Biogeochemistry 92 (1-2): 163–176

Kinyangi, J. Herrero, M .Omolo, A Van De Steeg, J and P K Thornton. (2008). Vulnerability to climate change and climate variability in the greater horn of Africa: Mapping impacts and adaptation (Report to the Program on Climate Change Adaptation in Africa). International Livestock Research Institute, Nairobi, Kenya 100 pp.

Ngoze S, Riha S, Lehmann J, Kinyangi J, Verchot L, Mbugua D and A Pell. (2008). Nutrient constraints to tropical agroecosystem productivity in long-term degrading soils. Global Change Biology 14: 2810-2822

Kimetu J, Lehmann J, Ngoze S, Mugendi D, Kinyangi J, Riha S, Verchot L, Recha J and Pell A. (2008). Reversibility of soil productivity decline with organic matter of differing quality along a degradation gradient. Ecosystems 11: 726–739

Lehmann, J., Solomon, D., Kinyangi, J., Wirick, S., Dathe, J. and Jacobsen C. (2008). Spatial complexity of soil organic matter forms at nanometer scales. Nature Geoscience 1: 238–242

Lehmann J, Kinyangi J and Solomon D. (2007). Organic matter stabilization in soil microaggregates: implications from spatial heterogeneity of organic carbon contents and carbon forms. Biogeochemistry 85: 45–57

Solomon D, Lehmann J, Kinyangi J, Amelung W, Lobe I, Ngoze S, Riha S, Pell A, Verchot L, Mbugua D Skjemstad J, and Schäfer T. (2007). Long-term impacts of anthropogenic perturbations on the dynamics and speciation of organic carbon in tropical forest and subtropical grassland ecosystems. Global Change Biology 13: 511-530

Kinyangi J, Solomon D, Liang B, Wirick S Lerotic M and Lehmann J. (2006). Nanoscale biogeocomplexity of the organomineral assemblage in soil: application of STXM microscopy and C 1s-NEXAFS spectroscopy. Soil Sci. Society of America Journal 70: 1708–171

Lehmann J, Liang B, Solomon D, Lerotic M, Luizão F, Kinyangi J, Schäfer T, Wirick S, and Jacobsen C. (2005). Near-edge X-ray absorption fine structure (NEXAFS) spectroscopy for mapping nano-scale distribution of organic carbon forms in soil: application to black carbon particles. Global Biogeochemical Cycles 19: GB1013. DOI 10.1029/2004GB002435.