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Inorganic Sources of Micronutrients

Sources of boron   Element (%) Water Solubility (g/100g H20)
C  
Granular borax
Na2B4O7•10H2O
11.3 2.5 1
Sodium tetraborate, anhydrous
Na2B4O7
21.5 1.3 1
Solubor
Na2B8O13•4H2O
20.5 22 13
Ammonium pentaborate
NH4B5O8•4H2O
19.9 7 18
Sources of copper   Element (%) Water Solubility (g/100g H20)
C
Copper sulfate
CuSO4•5H2O
25.0 24 1
Cuprous oxide
Cu2O
88.8 insoluable  
Cupric oxide
CuO
79.8 insoluable  
Cuprous chloride
Cu2Cl2
64.2 1.5 25
Cupric chloride
CuCl2
47.2 71 1
Sources of iron   Element (%) Water Solubility (g/100g H20)
C
Ferrous sulfate
FeSO4•7H2O
20.1 33 1
Ferric sulfate
Fe(SO4)3•9H2O
19.9 440 20
Iron oxalate
Fe2(C2O4)3
30.0 very soluble 1
Ferrous ammonium sulfate
Fe(NH4)2(SO4)2•6H2O
14.2 18 1
Ferric chloride
FeCl3
34.4 74 1
Sources of manganese   Element (%) Water Solubility (g/100g H20)
C
Manganous sulfate
MnSO4•4H2O
24.6 105 1
Manganous carbonate
MnCO3
47.8 0.0065 25
Manganese oxide
Mn3O4
72.0 insoluable  
Manganous chloride
MnCl2
43.7 63 1
Manganous oxide
MnO
77.4    
Sources of molybdenum   Element (%) Water Solubility (g/100g H20)
C
Sodium molybdate
Na2MoO4•H2O
39.7 56 1
Ammonium molybdate
(NH4)6Mo7O24•4H2O
54.3 44 25
Molybdic oxide
MoO3
66.0 0.11 18
Sources of zinc   Element (%) Water Solubility (g/100g H20)
C
Zinc sulfate
ZnSO4•H2O
36.4 89 100
Zinc oxide
ZnO
80.3 insoluable  
Zinc carbonate
ZnCO3
52.1 0.001 16
Zinc chloride
ZnCl2
48.0 432 25
Zinc oxysulfate
ZnO•ZnSO4
53.8
Zinc ammonium sulfate
ZnSO4•(NH4)2SO4•6H2O
16.3 9.6 1
Zinc nitrate
Zn(NO3)2•6H2O
22.0 324 20