{"id":"W2005018293","doi":"10.4141/s06-010","title":"Soil nutrient stratification and uptake by wheat after seven years of conventional and zero tillage in the Northern Grain belt of Canada","year":2006,"lang":"en","type":"article","venue":"Canadian Journal of Soil Science","topic":"Soil Carbon and Nitrogen Dynamics","field":"Agricultural and Biological Sciences","cited_by":65,"is_retracted":false,"has_abstract":true,"ca_institutions":"Alberta Crop Industry Development Fund; Agriculture and Agri-Food Canada","funders":"Alberta Agricultural Research Institute","keywords":"Agronomy; Tillage; No-till farming; Canola; Conventional tillage; Environmental science; Nutrient; Monoculture; Chemistry; Soil fertility; Soil water; Biology; Soil science","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":true,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0004976912,0.00004662166,0.00008543323,0.00002783983,0.00006888928,0.00002983423,0.0001650723,0.00002329864,0.000007751094],"category_scores_gemma":[0.00003003878,0.00002146256,0.00002041101,0.0002781172,0.0003255347,0.00007519068,0.000006533968,0.00005922398,4.556092e-8],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00005868521,"about_ca_system_score_gemma":0.0004525739,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.6459153,"about_ca_topic_score_gemma":0.9918056,"domain_scores_codex":[0.9992698,0.00002716543,0.0002107594,0.00008422475,0.0002608912,0.0001471622],"domain_scores_gemma":[0.9995731,0.00003864879,0.0001233096,0.00002813824,0.0001058056,0.000130959],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0000340978,0.00006256707,0.9099047,0.00001816845,0.00001003027,0.000062494,0.001111835,0.0001229327,0.06279806,0.002047993,0.001285367,0.02254177],"study_design_scores_gemma":[0.00009184954,0.00005684208,0.9968867,0.00001731659,0.000003672642,0.000026901,0.0005484161,0.0001921399,0.0006043656,0.001248447,0.0002771695,0.00004619083],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9985384,0.000435348,6.344341e-7,0.0007474779,0.00004334326,0.00004165416,0.00005649504,3.903187e-7,0.0001362794],"genre_scores_gemma":[0.9998622,0.00001204135,0.000008641332,0.0000667182,0.00001624591,8.131556e-7,0.00000329406,3.649565e-7,0.00002968948],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.3458903,"threshold_uncertainty_score":0.3564426,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.006099453305249938,"score_gpt":0.1747207372670159,"score_spread":0.168621283961766,"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."}}