Losses of iron in leachates from organic components of potting media.

abonos de oligoelementos application rates complejos organominerales cultivo sin tierra culture sans sol desechos de la madera disponibilidad de nutrientes fer growing media hierro iron leachates lessivat lixiviados losses micronutrient fertilizers nutrient availability organomineral complexes peat perte soilless culture substrat de culture substratos de cultivo sulfate sulfatos sulphates tourbe turba wood residues