Maize root‐induced change in soil organic carbon pools
Bibliographic record
Abstract
Quantification of root or root‐induced changes in soil organic C (SOC), water‐soluble organic C (WSOC), and microbial biomass C (MBC) is important for understanding processes of soil C storage. A greenhouse study was conducted on a Bainsville loamy sand (Typic Hapludoll) to evaluate root or root‐induced quantitative and compositional changes in various SOC pools by growing corn ( Zea mays L.), a C 4 plant, on a historically C 3 soil. Significant shifts in 13 C of SOC pools, most noticeably in WSOC and MBC were observed. During the course of a growing season, the proportion of C 4 ‐derived C varied from 0 to 12.3% of whole SOC, from 0 to 30.7% of WSOC, and from 0 to 52% of MBC, indicating a major contribution of root or root‐induced C to various soil C components, especially WSOC and MBC. The amount of C 4 ‐derived C in the entire soil estimated by the 13 C natural abundance (δ 13 C) was remarkably consistent with the amount of C 4 ‐C retained in the soil microbial biomass, WSOC, and corn roots, suggesting that measurements of 13 C of the entire soil following the shift of C 3 to C 4 plants can be used as an indirect measure of root or root‐induced C pools during the growing period.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".