Resin-coated, controlled-release fertilizer as a pre-plant alternative to nitrogen enrichment of stem core in soilless media containing ground stem core of kenaf (Hibiscus cannabinus L.)

azote cultivo sin tierra culture sans sol engrais retard fertigation growing media hibiscus cannabinus irrigation fertilisante kenaf lycopersicon esculentum nitrogen peat slow release fertilizers soilless culture substrat de culture substratos de cultivo tomate tomatoes tourbe turba