@article{fdi:010060570,
  title = {{C}ontrasting approaches for estimating soil carbon changes in {A}mazon and {C}errado biomes},
  author = {{M}aia, {S}. {M}. {F}. and {C}arvalho, {J}. {L}. {N}. and {C}erri, {C}. {E}. {P}. and {L}al, {R}. and {B}ernoux, {M}artial and {G}aldos, {M}. {V}. and {C}erri, {C}. {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {B}razilian {A}mazon and {C}errado are among the principal agricultural frontiers of the world, and have attracted global attention because of their potential to be a source or sink of atmospheric {CO}2. {H}owever, accurately quantifying alterations in soil organic carbon ({SOC}) due to land-use changes remains to be a major challenge. {U}sing a meta-analysis, our objective was to evaluate tillage effects on {SOC} stocks in {B}razil's {A}mazon and {C}errado biomes. {T}wo approaches: (1) the classical {SOC} annual change rate which provides only an arithmetic average of {SOC} changes, and (2) the rate of annual change adjusted from management factors derived according to the {I}ntergovernmental {P}anel on {C}limate {C}hange ({IPCC}) {SOC} methodology, which allows a temporal dataset adjustment, were used. {R}egardless of approach, conservation technologies such as no-tillage ({NT}) and integrated crop-livestock ({ICL}) systems were identified as viable options for {SOC} sequestration, increasing it between 9 and 16%. {O}ne exception was adoption of {NT} in the {A}mazon forest, where {SOC} decreased by 9% over 20 years. {C}omparing results of the two approaches showed substantial differences between them. {F}or conversions from {NT} to {ICL} or from native vegetation to full tillage ({FT}), the {IPCC}-based approach produced {SOC} stock estimates that were 65 and 47% lower, respectively, than with the classical approach. {T}he {IPCC} approach also identified modeling covariate effects and was influenced less by outliers, thus reducing the risk of under or overestimating soil management effects on {SOC}.},
  keywords = {{IPCC}-based method ; {SOC} stock rates ; {L}and use change ; {CO}2 emissions ; {BRESIL} ; {AMAZONIE}},
  booktitle = {},
  journal = {{S}oil and {T}illage {R}esearch},
  volume = {133},
  numero = {},
  pages = {75--84},
  ISSN = {0167-1987},
  year = {2013},
  DOI = {10.1016/j.still.2013.06.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060570},
}