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This study examines the potential, magnitude, and causes of enhanced biological N2 fixation (BNF) by common beans (Phaseolus vulgaris L.) through bio-char additions (charcoal, biomass-derived black carbon). Bio-char was added at 0, 30, 60, and 90 g kg?1 soil, and BNF was determined using the isot...


Rondón, Marco AntonioLehmann, JohannesRamírez, JuanHurtado, MP[Biological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additions]Biological nitrogen fixation by common beans (Phaseolus vulgaris L.) increases with bio-char additions

Black carbon (BC) is an important pool of the global C cycle, because it cycles much more slowly than others and may even be managed for C sequestration. Using stable isotope techniques, we investigated the fate of BC applied to a savanna Oxisol in Colombia at rates of 0, 11.6, 23.2 and 116.1 t B...


Major, JLehmann, JohannesRondón, Marco AntonioGoodale, C[Fate of soil applied black carbon: downward migration, leaching and soil respiration]Fate of soil applied black carbon: downward migration, leaching and soil respiration

When building soil organic matter (SOM) contents in agricultural production systems, stabilization of both pre-existing as well as added C is important. A laboratory mineralization experiment was conducted over 374 days to evaluate the effect of pre-existing SOM on soil C mineralization after add...


Kimetu, J.M.Lehmann, JohannesKinyangi, JamesCheng, C.H.Thies, J.Mugendi, D.N.Pell, A.[Soil organic C stabilization and thresholds in C saturation]Soil organic C stabilization and thresholds in C saturation
Recha, John W.M.Lehmann, JohannesWalter, M.T.Pell, AVerchot, Louis V.Johnson, M.[Stream discharge in tropical headwater catchments as a result of forest clearing and soil degradation]Stream discharge in tropical headwater catchments as a result of forest clearing and soil degradation
Major, JulieRondón, Marco AntonioMolina, DiegoRiha, Susan J.Lehmann, Johannes[Nutrient Leaching in a Colombian Savanna Oxisol Amended with Biochar]Nutrient Leaching in a Colombian Savanna Oxisol Amended with Biochar

In the highlands of Western Kenya, we investigated the reversibility of soil productivity decline with increasing length of continuous maize cultivation over 100 years (corresponding to decreasing soil organic carbon (SOC) and nutrient contents) using organic matter additions of differing quality...


Kimetu, J.Lehmann, JohannesNgoze, S.Mugendi, D.Kinyangi, JamesRiha, S.Verchot, Louis V.Recha, John W.M.Pell, A.[Reversibility of soil productivity decline with organic matter of differing quality along a degradation gradient]Reversibility of soil productivity decline with organic matter of differing quality along a degradation gradient
Recha, John W.M.Lehmann, JohannesWalter, M.T.Pell, AVerchot, Louis V.Johnson, M.[Stream water nutrient and organic carbon exports from tropical headwater catchments at a soil degradation gradient]Stream water nutrient and organic carbon exports from tropical headwater catchments at a soil degradation gradient

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