Claim · model-written summary
Fractional biochar application over ten years was estimated to retain over 97% of soil carbon content.
- Taxon
- cowpea
Vigna unguiculatae1 - Treatment
- fractional biochar application in ten yearse0
- Outcome
- soil carbon contente0
- Direction
- retaine0
- Value
- over 97%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“fractional biochar application in ten years can retain over 97% of soil carbon content”
e1“Field trials with cowpea”
Title
Vinicius John; Ana Rita de Oliveira Braga; Criscian Kellen Amaro de Oliveira Danielli; et al. Agriculture 2025. doi:10.3390/agriculture15151700
Other claims from this paper (8)
- Intervention effect Biochar alone increased cowpea revenue by 34%.
- Intervention effect Combining biochar and lime raised cowpea revenues by up to 84.6%.
- Intervention effect The control generated greater net revenue than lime alone.
- Intervention effect Traditional-kiln biochar increased net revenue 94% compared with liming.
- Observation Prototype kiln production cost USD 0.87–2.06 kg−1.
- Observation Traditional kiln production costs were significantly lower at USD 0.03–0.08 kg−1.
- Observation Carbon credits were estimated as the largest potential income source at USD 2217 ha−1.
- Recommendation The authors recommend public policies and technological adaptations to aid biochar adoption.