Panel A | ||||||
---|---|---|---|---|---|---|
pH | Corg | T [°C]/ | DT50/DT90 [days], best fita | |||
(CaCl2) | [%] | M [%] | 2,4-D | 2,4-DCP | 2,4-DCA | |
Soils from railway tracks | ||||||
EB | 7.7 | 0.15 | 20/35 | 35/115 SFO | 27/129 DFOP | 82/271 SFO |
MBS | 7.6 | 0.31 | 20/60 | 39/131 SFOc | 1.0/7.0 FOMC | 9.2/31 SFO |
MR | 7.6 | ≈ 0.04 | 20/72 | > 1000/> 1000 SFOc | 4.1/18 DFOP | 0.3/2.1 DFOP |
CS | 7.5 | < 0.06 | 20/65 | 203/675 SFOc | 66/519 FOMC | 101/335 SFO |
DT50 [days], modeling endpointsb | ||||||
---|---|---|---|---|---|---|
Geom. mean, 20 °C, pF 2 | ≈ 0.1 | 115 | 12 | 14 | ||
Agricultural soils [13] | ||||||
Min–max | 6.2–7.8d | 0.9–3.7 | 20/50 | 1.6–95 | 3.2–6.2 | 11–16 |
Geom. mean, 20 °C, pF 2 | 1.5/1.8/1.8e | 4.4 | 7.0 | 10 |
Panel B | ||||||
---|---|---|---|---|---|---|
Sequence of fitting | DT50 [days] 2,4-Df | Formation fraction [%]g | DT50 [days] 2,4-DCPf | Formation fraction [%]g | DT50 [days] 2,4-DCAf | |
EB | 2,4-D → 2,4-DCP → 2,4-DCA → sink | 35 SFO | 34 | 35 SFO | 32 | 33 SFO |
2,4-DCP → 2,4-DCA → sink | 28 DFOP | 12 | 103 SFO | |||
MBS | 2,4-D → 2,4-DCP → sink | 40 SFOc | 16 | 2.6 SFOc | ||
2,4-DCP → 2,4-DCA → sink | 1.0 FOMC | 6.4 | 16 SFO | |||
MR | 2,4-DCP → 2,4-DCA → sink | 4.1 DFOP | 2.2 | 11 SFO | ||
2,4-DCA → 2,4-DCP → sink | 4.8 SFO | 79h | 0.3 DFOP | |||
CS | 2,4-DCP → 2,4-DCA → sink | 66 FOMC | 2.5 | 101 SFO |