0.1 M Na pyrophosphate @ pH 10 (SSSIR method)
0.1 M sodium pyrophosphate (Soil Survey Laboratory Staff, 1992)
parallel, 16 hours extract time, 0.1M solution (pH 10)

Method  0.15M, 2hr, Seq.   0 = trace amount

Parallel, 16 hour extrcation time, Crow lab method

Trumbore Chiquito 1992 0-4 HCl NaOH residue
Trumbore Chiquito 1992 17-30 HCl residue
Trumbore Chiquito 2001 (GR-RF-1) 8-27 HF
Trumbore Chiquito 2001 (GR-RF-1) 8-27 LF
Trumbore Corbett 1959 0-10 HCl NaOH residue
Trumbore Corbett 1959 10-20 HCl NaOH residue
Trumbore Corbett 1992 0-6 HCl NaOH residue
Trumbore Corbett 1992 13-23 HCl NaOH residue
Trumbore Falbrook 1959 0-10 HCl NaOH residue
Trumbore Falbrook 1959 10-23 HCl NaOH residue
Trumbore Falbrook 1959 10-23 HCl residue
Trumbore Falbrook 1992 0-4 HCl NaOH residue
Trumbore Falbrook 1992 8-12 HCl NaOH residue
Trumbore Musick 1958 0-18 HCl NaOH residue
Trumbore Musick 1992 0-7 HCl NaOH residue
Trumbore Musick 1992 13-19 HCl NaOH residue
Trumbore Shaver 1 1959 0-20 HCl NaOH residue
Trumbore Shaver 1992 10-20 HCl NaOH residue
Trumbore Shaver 1992 5-10 HCl NaOH residue
Trumbore Shaver 2 1959 0-15 HCl NaOH residue

Centro Nacional de Aceleradores (Seville, Spain)
Institute of Geography Radiocarbon Laboratory

0.2 M acid ammonium oxalate, 4 hour, parallel, See Porras et al., 2017

0-20 cm plus litter. coarse roots removed, fine roots remained intact and presumed to have died
1/3 Of + 2/3A; sample for incub. -1/2 Of+1/2A, the rest A collapsed
coarse roots removed, fine roots remained intact and presumed to have died
Contains big fresh root, d=1 cm, l=10 cm.
Drier than (1);mostly lichens and ???; few tiny FM.
five dry/wet cycles in which rewetting events were separated by 19-day dry periods (referred to 5-cycle). One dry/wet cycle started with a rewetting, and consisted of rewetting to 35% WHC and incubating moist for 3 days, followed by a 3-day dry-down period before the drought period as described above (Xiang et al. 2008).
huge chunks of wood with a little of fibric O
humic O +A; big inclusions of wood, both relat. Fresh and half-decomposed
inc_type not specified; data are reported for aerobic CO2 measurements only; flux rate averaged over 500 days of incubation
incubated for an additional 14 prior to 23 day incubation
Interm. moisture content (between 1 and 2); FM dominates; lichens
Jar leaked (flux data 1.5x higher than other reps)
Lichens in ground cover; Oh with inclusions of charred bark and rel. well preserved wood
live moss (FM); dead decidious leaves, well preserved
Mostly A ;  inclusion of half-decomp. Wood
No living plants, charred moss/lichens.2/3 Oh + 1/3 A1A2 crumbled
Of- root/moss (FM) mat, with fresh woody roots d<1 cm
organic horizons with large roots removed
Real org-mineral hrz., of crumbled structure
some charred wood, but less than in (2); many live roots of shrubs
Visibly bleached - eluviated -  compared to site (1). A1A2 or Ae
well humified, charred; lichens dominate over FM