Nitrogen and Phosphorus Cycles

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 Grobbelaar, N. and M. W. Rosch, 1981. Biological nitrogen fixation in a Northern Transvaal savanna. Journal of South African Botany 47, 493-506.

 Gunton, C, 1981. Seasonal changes in nitrogen in the soils and selected plant species in the Burkea africana (Hook) savanna. MSc thesis, University of Witwatersrand, Johannesburg.

 Harris, G. W., F. G. Wienhold, and T Zenker, 1996. Airborne observations of strong biogenic NO, emissions from the Namibian savanna at the end of the
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Parsons, D. A. B.; Scholes, M. C.; Scholes, R. J.; Levine, J. S., 1996. Biogenic No Emissions From Savanna Soils As a Function of Fire Regime, Soil Type, Soil Nitrogen, and Water Status. Journal of Geophysical Research 101, 23,683-23,688

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 Schultze, E.D. et. al., 1991: Estimates of nitrogen fixation by trees on an aridity gradient in Namibia. Oecologia, 88, 451-455.

Serca, D.; Delmas, R; Le Roux, X.; Parsons, D. A.; Scholes, MC; Abbadie, J.; Ronce, O.; and Labroue, L., 1998. Comparision of nitrogen monoxide emissions from several African tropical ecosystems and influence of season and fire. Global Biogeochemical Cycles 12 (4) pp.637-651.
 
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Verchot, L. V., E. A. Davidson, J. H. Cattanio, I. L. Ackerman, H. E. Erikson, and M. Keller, 1999. Land use change and biogeochemical controls of nitrogenoxide emissions from soils in eastern Amazonia. Global Biogeochemical Cycles 13: 31-46.

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