The nutrient solutions were prepared manually once per ten days dissolving appropriate amounts of Ca(NO3)2, KNO3, K2SO4, KH2PO4, MgSO4 and chelates for trace elements into preacidified groundwater, pH was further adjusted to 6.0-7.0 after salt addition
The nutrient solutions were prepared manuallyonce per ten days dissolving appropriate amounts of Ca(NO3)2, KNO3,K2SO4, KH2PO4, MgSO4 and chelates for trace elements into preacidifiedgroundwater, pH was further adjusted to 6.0-7.0 after salt addition