Treatment | Week 0 | Week 5 | Week 10 | Week 16 | Week 27 | Week 34 | |
| g C kg−1 | ||||||
Summer | Combine | 412.7 | 314.9 c† | 350.6 a | 352.0 a | 256.0 a | 258.1 a |
| Iron & Clay | 410.7 | 340.4 bc | 359.6 a | 340.8 a | 278.8 a | 281.0 a |
| Laredo | 421.7 | 373.6 ab | 403.2 a | 392.1 a | 278.4 a | 310.4 a |
| Vernal | 438.3 | 390.4 a | 387.3 a | 388.3 a | 271.8 a | 287.9 a |
| Mungbean | 430.1 | 358.4 ab | 404.5 a | 365.6 a | 257.0 a | 273.2 a |
Winter | Fallow | 422.7 | 352.8 a | 370.3 a | 374.7 a | 244.5 b | 270.8 a |
| Rye | 422.7 | 358.3 a | 391.8 a | 360.9 a | 291.5 a | 293.2 a |
Fallow | Combine | 412.7 | 323.4 bc | 310.9 c | 356.2 ab | 240.4 a | 249.7 a |
| Iron & Clay | 410.7 | 324.4 bc | 341.0 bc | 341.8 ab | 256.5 a | 256.1 a |
| Laredo | 421.7 | 378.5 a | 404.2 ab | 417.5 a | 255.1 a | 310.7 a |
| Vernal | 438.3 | 381.3 a | 362.7 abc | 390.5 ab | 239.6 a | 259.3 a |
| Mungbean | 430.1 | 356.2 abc | 432.7 a | 367.3 ab | 220.5 a | 291.3 a |
Rye | Combine | 412.7 | 306.4 c | 390.2 ab | 347.7 ab | 271.6 a | 266.5 a |
| Iron & Clay | 410.7 | 356.3 ab | 378.3 abc | 339.9 b | 301.0 a | 305.8 a |
| Laredo | 421.7 | 368.6 ab | 402.2 ab | 366.8 ab | 301.6 a | 310.1 a |
| Vernal | 438.3 | 399.6 a | 411.9 ab | 386.2 ab | 303.9 a | 316.5 a |
| Mungbean | 430.1 | 360.5 ab | 376.2 abc | 363.9 ab | 279.2 a | 267.4 a |