{"id":"W3014860656","doi":"10.1371/journal.pone.0230952","title":"Using Maize δ15N values to assess soil fertility in fifteenth- and sixteenth-century ad Iroquoian agricultural fields","year":2020,"lang":"en","type":"article","venue":"PLoS ONE","topic":"Archaeology and ancient environmental studies","field":"Earth and Planetary Sciences","cited_by":20,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"National Science Foundation","keywords":"Subsistence agriculture; Archaeology; Agriculture; Fifteenth; Edaphic; Archaeological evidence; Geography; Agroforestry; Biology; History; Ecology; Ancient history; Soil water","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.00008606991,0.0001205912,0.0001965134,0.00002027858,0.0001641357,0.00001343197,0.0001063477,0.0000578871,0.0004096025],"category_scores_gemma":[0.00005210499,0.00009310296,0.00002527959,0.0001179804,0.0001256618,0.0001289235,0.00008490059,0.0001490462,0.00006504432],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000006531148,"about_ca_system_score_gemma":0.000005405358,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0002502037,"about_ca_topic_score_gemma":0.001073525,"domain_scores_codex":[0.9990527,0.00006455615,0.0001492068,0.0002820257,0.0001900079,0.0002614934],"domain_scores_gemma":[0.9996783,0.00006380825,0.00002982128,0.00006609106,0.000006455468,0.0001555908],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00005231273,0.00008421344,0.9960514,0.00003242471,0.00002923039,0.00000997942,0.001379729,0.0002861138,0.0009269941,0.000002271742,0.00002798543,0.001117396],"study_design_scores_gemma":[0.0001712441,0.0001134091,0.9962521,0.00003015075,0.00002165397,7.504378e-7,0.0006341515,0.001596688,0.0008819333,0.00008172321,0.0000854613,0.0001306999],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9958602,0.00108244,0.00002207265,0.002083395,0.00003674783,0.0001905796,0.0000337222,0.00002223714,0.0006686569],"genre_scores_gemma":[0.9972799,0.000280569,0.001372621,0.0009528948,0.00004245094,0.000001735795,0.00002252368,0.000001871919,0.00004546603],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.001419718,"threshold_uncertainty_score":0.4484861,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.09387835498449404,"score_gpt":0.2276753499474485,"score_spread":0.1337969949629545,"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."}}