{"id":"W1852280710","doi":"10.1029/2009gb003699","title":"Tree ring evidence for limited direct CO<sub>2</sub> fertilization of forests over the 20th century","year":2010,"lang":"en","type":"article","venue":"Global Biogeochemical Cycles","topic":"Plant Water Relations and Carbon Dynamics","field":"Environmental Science","cited_by":149,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Guelph","funders":"","keywords":"Human fertilization; Productivity; Environmental science; Dendrochronology; Climate change; Latitude; Carbon sequestration; Ecology; Pinus <genus>; Global warming; Atmospheric sciences; Agronomy; Biology; Geography; Botany; Carbon dioxide; Geology","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0005808649,0.00009629469,0.000139689,0.0004420138,0.000253679,0.0004507459,0.0002123843,0.0002611213,0.002890864],"category_scores_gemma":[0.001604608,0.0001209436,0.0001139109,0.0004559285,0.0004166162,0.0003024678,0.0003185218,0.0002232997,0.0004149046],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0002488723,"about_ca_system_score_gemma":0.0001692837,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.005693371,"about_ca_topic_score_gemma":0.01244124,"domain_scores_codex":[0.9998148,0.00002196037,0.0000192519,0.00008468355,0.00002835013,0.00003094845],"domain_scores_gemma":[0.9971595,0.0003800632,0.001448505,0.0002747364,0.0005016527,0.0002355995],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0002469106,0.00001906383,0.9733859,0.00009621023,0.00009376989,0.0001420328,0.0002617531,0.0002237258,0.01079544,0.0005351876,0.0005903759,0.01360946],"study_design_scores_gemma":[0.000002405844,0.00001884786,0.9975522,0.000008411947,0.00002288159,0.0001174643,0.00004652304,0.00009457394,0.0005281619,0.00005426323,0.00155211,0.000002135161],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9898924,0.001758258,0.0003744671,0.0002798356,0.00002801206,0.000003017773,0.001064123,0.00002083644,0.006579238],"genre_scores_gemma":[0.9984376,0.0003372509,0.0001183322,0.00008104808,0.00003107066,0.000002052793,0.0004398587,0.00000378438,0.0005490335],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.005693371,"threshold_uncertainty_score":0.01132047,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0124817787139838,"score_gpt":0.2435446185676738,"score_spread":0.23106283985369,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}