[Soft water preferred. Fertilization of Euphorbia-Lomii-hybrids in hydroponics]

abonos compuestos abonos nitrogenados ammonia ammoniac azote calcium carbonate calidad del agua carbonate de calcium carbonato de calcio compound fertilizers culture hydroponique euphorbia fertilisation fertilizer application hydroponics nitrogen nitrogen fertilizers nutrient solutions oxygen requirement ph racine roots soluciones nutritivas solution nutritive water quality