Lu, Haiying Surface soil mixing is more beneficial than the plough layer mixing mode of biochar application for nitrogen retention in a paddy system. [electronic resource] - The Science of the total environment May 2020 - 137399 p. digital Publication Type: Journal Article ISSN: 1879-1026 Standard No.: 10.1016/j.scitotenv.2020.137399 doi Subjects--Topical Terms: CharcoalFertilizersNitrogenOryzaSoil