Table 1.

Salts (g L^–1) and ions (mm) in the nitrate and ammonium solutions

NO3− solution				NH4+ solution
Salt	g L–1	Ion	mm	Salt	g L–1	Ion	mm
Ca(NO3)2.4H2O	0·8	NH4+	0	(NH4)2SO4	0·5	NH4+	7·46
KH2PO4	0·8	NO3–	6·78	K2HPO4	0·3	NO3–	0
MgSO4.7H2O	0·75	PO43–	5·88	KH2PO4	0·46	PO43–	5·1
CaSO4.2H2O	0·645	K+	5·88	MgSO4.7H2O	0·75	K+	6·82
Fe-EDTA	0·042	Ca2+	7·14	CaSO4.2H2O	0·89	Ca2+	5·17
Trace elements	0·5	Mg2+	3·04	Fe-EDTA	0·042	Mg2+	3·04
		SO42–	6·79	Trace elements	0·5	SO42–	11·94