title: Soil tests for available copper and zinc in soils of Western Nigeria.
mesh_terms: D003300:Copper / Q000032:analysis* / Q000378:metabolism; D002523:Edible Grain / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D009549:Nigeria; D010087:Oxides; D012987:Soil / Q000032:analysis*; D013329:Structure-Activity Relationship; D015032:Zinc / Q000032:analysis* / Q000378:metabolism
chemical_list: D010087:Oxides; D012987:Soil; D003300:Copper; D015032:Zinc