Method of judging copper deficiency from the concentration of soluble copper in soils and the copper: Iron ratio in wheat plants

agentes nocivos agronomic characters andosol andosoles andosols cambisol cambisoles cambisols cereales cereals chemicophysical properties chemistry chimie chimie du sol cobre composition contaminantes contaminantes industriales copper crops cuivre cultivos cultivos de grano deficiencia de minerales deficiencia de oligoelementos deficiency diseases disorders economic plants elements environment environnement facteur nuisible fer fertilidad del suelo functional disorders genetic soil types grain crops heavy metals hierro histosol histosoles histosols industrial pollutants injurious factors iron maladie de carence medio ambiente metabolic disorders metal metales metales pesados metals mineral deficiencies nutritional disorders ph plantas plante plante de culture plants polluant polluant industriel pollutants site factors soil chemistry soil fertility soil types trace element deficiencies transition elements trastornos trastornos funcionales trastornos nutricionales trigo trouble trouble fonctionnel trouble nutritionnel type de sol wheats