Articles | Volume 9, issue 1
https://doi.org/10.5194/soil-9-301-2023
https://doi.org/10.5194/soil-9-301-2023
Original research article
 | 
05 Jun 2023
Original research article |  | 05 Jun 2023

Managing soil organic carbon in tropical agroecosystems: evidence from four long-term experiments in Kenya

Moritz Laub, Marc Corbeels, Antoine Couëdel, Samuel Mathu Ndungu, Monicah Wanjiku Mucheru-Muna, Daniel Mugendi, Magdalena Necpalova, Wycliffe Waswa, Marijn Van de Broek, Bernard Vanlauwe, and Johan Six

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Short summary
In sub-Saharan Africa, long-term low-input maize cropping threatens soil fertility. We studied how different quality organic inputs combined with mineral N fertilizer could counteract this. Farmyard manure was the best input to counteract soil carbon loss; mineral N fertilizer had no effect on carbon. Yet, the rates needed to offset soil carbon losses are unrealistic for farmers (>10 t of dry matter per hectare and year). Additional agronomic measures may be needed.
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