Table 1. Fertilizer recommendations for hydroponic (perlite, rockwool, and NFT) tomatoes in Florida.
Stage of growth |
|||||
1 |
2 |
3 |
4 |
5 |
|
Nutrient |
Transplant to 1st cluster |
1st cluster to 2nd cluster |
2nd cluster to 3rd cluster |
3rd cluster to 5th cluster |
5th cluster to termination |
--------------- Final delivered nutrient solution concentration (ppm)z -------------- |
|||||
N |
70 |
80 |
100 |
120 |
150 |
P |
50 |
50 |
50 |
50 |
50 |
K |
120 |
120 |
150 |
150 |
200 |
Ca |
150 |
150 |
150 |
150 |
150 |
Mg |
40 |
40 |
40 |
50 |
50 |
S |
50 |
50 |
50 |
60 |
60 |
Fe |
2.8 |
2.8 |
2.8 |
2.8 |
2.8 |
Cu |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
Mn |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
Zn |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
B |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
Mo |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
NOTE: Ca, Mg, and S concentrations may vary depending on Ca and Mg concentration in wellwater and amount of sulfuric acid used for acidification.z 1ppm = 1mg/liter |
Selected Pre-mixed Materialsz |
||||
Nutrient |
Pre-mix 1 4-18-38 % |
Pre-mix 2 3-15-27 % |
Pre-mix 3 5-11-26 % |
Pre-mix 4 7-17-37 % |
N |
4 |
3 |
5 |
7 |
P2O5 (P) |
18 (7.7) |
15 (6.5) |
11 (4.7) |
17 (7.3) |
K2O (K) |
38 (32) |
27 (22) |
26 (22) |
37 (31) |
Mg |
0 |
5.32 |
0 |
0 |
Fe |
0.4 |
0.45 |
0.31 |
0.40 |
Mn |
0.2 |
0.057 |
0.05 |
0.10 |
Zn |
0.05 |
0.034 |
0.016 |
0.02 |
Cu |
0.05 |
0.011 |
0.016 |
0.01 |
B |
0.20 |
0.170 |
0.05 |
0.18 |
Mo |
0.01 |
0.011 |
0.01 |
0.01 |
Individual Ingredientsy |
||||
Ammonium nitrate (NH4NO3) |
33.5% N |
|||
Calcium nitrate liquid (7-0-0-11) 12.1 lb/gal (Ca(NO3)2) |
7%N, 11% Ca |
|||
Calcium nitrate (Ca(NO3)2)-dry |
15% N, 19% Ca |
|||
Calcium chloride (CaCl2) |
36% Ca |
|||
Potassium nitrate (KNO3) |
13% N, 36.5 K |
|||
Monopotassium phosphate (KH2PO4) |
23% P, 28% K |
|||
Phosphoric acid (H3PO4) 13 lb./gal. |
23% P |
|||
Potassium chloride (KCl) - greenhouse |
51% K |
|||
Magnesium sulfate (MgSO4) |
10% Mg, 14% S |
|||
Solubor |
20.5% B |
|||
Copper sulfate (CuSO4) |
25% Cu |
|||
Zinc sulfate (ZnSO4) |
36% Zn |
|||
Iron, Fe 330 chelated iron, etc. |
10% Fe |
|||
Manganous sulfate (MnSO4) |
28% Mn |
|||
Sodium molybdate (Na2(Mo)4) (liquid), (11.4 lb/gal) |
17% Mo |
|||
Sodium molybdate (dry) Na2(MoO4) |
39.6 % Mo |
|||
Soluble Trace Element Mixture (S.T.E.M.): |
1.35% B |
|||
7.5% Fe |
||||
8.0% Mn |
||||
0.04% Mo |
||||
4.5% Zn |
||||
3.2 % Cu |
||||
Convert K2O to K by multiplying by 0.83. Convert P2O5 to P by multiplying by 0.44. |
||||
z Mention of a trade name does not constitute an endorsement or recommendation. |
||||
yExact nutrient concentration of the fertilizer material may vary depending on commercial source. |
Stage of growth |
|||||
1 |
2 |
3 |
4 |
5 |
|
Transplant to 1st cluster set |
1st cluster to 2nd cluster |
2nd cluster to 3rd cluster |
3rd cluster to 5th cluster |
5th cluster to termination |
|
---------------------------Pre-mix 1 (4-18-38)------------------------ |
|||||
1 |
2 |
3 |
4 |
5 |
|
A Stock |
16 lb. Pre-mix 1 10 lb. MgSO4 |
16 lb. Pre-mix 1 10 lb. MgSO4 |
16 lb. Pre-mix 1 10 lb. MgSO4 |
16 lb. Pre-mix 1 12 lb. MgSO4 |
16 lb. Pre-mix 1 12 lb. MgSO4 |
B Stock |
7.5 lb. Ca(NO3)2 |
9.5 lb. Ca(NO3)2 |
12.0 lb. Ca(NO3)2 |
16.5 lb. Ca(NO3)2 |
20.5 lb. Ca(NO3)2 |
-------------------------final concentrations (ppm)------------------- |
|||||
N |
70 |
82 |
100 |
124 |
148 |
P |
49 |
49 |
49 |
49 |
49 |
K |
200 |
200 |
200 |
200 |
200 |
Ca |
56 |
71 |
94 |
124 |
154 |
Mg |
40 |
40 |
40 |
48 |
48 |
S |
50 |
50 |
50 |
60 |
60 |
Fe |
2.5 |
2.5 |
2.5 |
2.5 |
2.5 |
Cu |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
Mn |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
Zn |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
B |
1.3 |
1.3 |
1.3 |
1.3 |
1.3 |
Mo |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
----------------------------------Pre-mix 2 (3-15-27)--------------------------- |
|||||
A Stock |
20 lb Pre-mix 2 |
20 lb Pre-mix 2 |
20 lb Pre-mix 2 |
20 lb Pre-mix 2 2 lb MgSO4 |
20 lb Pre-mix 2 2 lb MgSO4 |
B Stock |
7.5 lb Ca(NO3)2 |
9.2 lb Ca(NO3)2 |
12. 4 lb Ca(NO3)2 |
15.7 lb Ca(NO3)2 |
19 lb Ca(NO3)2 2 lb KNO3 |
-------------------------final concentrations (ppm)--------------------------- |
|||||
N |
70 |
80 |
100 |
120 |
150 |
P |
51 |
51 |
51 |
51 |
51 |
K |
178 |
178 |
178 |
178 |
208 |
Ca |
57 |
69 |
93 |
118 |
143 |
Mg |
42 |
42 |
42 |
50 |
50 |
S |
(est.) 50 |
50 |
50 |
60 |
60 |
Fe |
3.6 |
3.6 |
3.6 |
3.6 |
3.6 |
Cu |
0.09 |
0.09 |
0.09 |
0.09 |
0.09 |
Mn |
0.45 |
0.45 |
0.45 |
0.45 |
0.45 |
Zn |
0.27 |
0.27 |
0.27 |
0.27 |
0.27 |
B |
1.35 |
1.35 |
1.35 |
1.35 |
1.35 |
Mo |
0.09 |
0.09 |
0.09 |
0.09 |
0.09 |
--------------------------Pre-mix 3 (5-11-26)---------------------------- |
|||||
1 |
2 |
3 |
4 |
5 |
|
A Stock |
27 lb Pre-mix 3 10 lb. MgSO4 |
27 lb Pre-mix 3 10 lb. MgSO4 |
27 lb Pre-mix 3 10 lb. MgSO4 |
27 lb Pre-mix 3 12 lb. MgSO4 |
27 lb Pre-mix 3 12 lb. MgSO4 |
B Stock |
2.8 lb Ca(NO3)2 |
4.4 lb Ca(NO3)2 |
7.7 lb Ca(NO3)2 |
11 lb Ca(NO3)2 |
16 lb Ca(NO3)2 |
----------------------final concentrations (ppm)---------------------- |
|||||
N |
70 |
80 |
100 |
120 |
150 |
P |
51 |
51 |
51 |
51 |
51 |
K |
232 |
232 |
232 |
232 |
232 |
Ca |
21 |
33 |
58 |
83 |
120 |
Mg |
40 |
40 |
40 |
50 |
50 |
S |
50 |
50 |
50 |
60 |
60 |
Fe |
3.3 |
3.3 |
3.3 |
3.3 |
3.3 |
Cu |
0.17 |
0.17 |
0.17 |
0.17 |
0.17 |
Mn |
0.55 |
0.55 |
0.55 |
0.55 |
0.55 |
Zn |
0.17 |
0.17 |
0.17 |
0.17 |
0.17 |
B |
0.55 |
0.55 |
0.55 |
0.55 |
0.55 |
Mo |
0.11 |
0.11 |
0.11 |
0.11 |
0.11 |
-----------------------Pre-mix 4 (7-17-37)----------------------- |
|||||
1 |
2 |
3 |
4 |
5 |
|
A Stock |
17 lb. Pre-mix 4 10 lb. MgSO4 |
17 lb. Pre-mix 4 10 lb. MgSO4 |
17 lb. Pre-mix 4 10 lb. MgSO4 |
17 lb. Pre-mix 4 12 lb. MgSO4 |
17 lb. Pre-mix 4 12 lb. MgSO4 |
B Stock |
4 lb. Ca(NO3)2 |
6 lb. Ca(NO3)2 |
9 lb. Ca(NO3)2 |
12 lb. Ca(NO3)2 |
17 lb. Ca(NO3)2 |
--------------------------final concentrations (ppm)---------------------- |
|||||
N |
71 |
83 |
101 |
119 |
149 |
P |
49 |
49 |
49 |
49 |
49 |
K |
208 |
208 |
208 |
208 |
208 |
Ca |
30 |
45 |
67 |
89 |
127 |
Mg |
40 |
40 |
40 |
48 |
48 |
S |
50 |
50 |
50 |
60 |
60 |
Fe |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
Cu |
0.07 |
0.07 |
0.07 |
0.07 |
0.07 |
Mn |
0.67 |
0.67 |
0.67 |
0.67 |
0.67 |
Zn |
0.14 |
0.14 |
0.14 |
0.14 |
0.14 |
B |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
Mo |
0.07 |
0.07 |
0.07 |
0.07 |
0.07 |
NOTE: Calculations in above table are for amount of fertilizer material in 30-gal stock tanks and then for a 1:100 dilution (1 gal each stock in 100 gals final nutrient solution). Fertilizer amounts placed in each stock tank will need to be doubled if fertilizer proportioner (1:100) pumps are installed in parallel in same incoming water line.Ca, Mg, and S values will vary upwards depending on the amount of Ca and Mg coming from the water source, and the of S coming from the sulfuric acid used for acidification. |
Amount of material |
Material |
ppm nutrient provided |
|
1 lb |
Potassium nitrate |
5 ppm N 14.5 ppm K |
|
1 lb |
Ammonium nitrate |
13.3 ppm N |
|
1 lb |
Potassium chloride |
20.3 ppm K |
|
1 lb |
Magnesium sulfate |
4 ppm Mg 5.6 ppm S |
|
1 pint |
Liquid calcium nitrate |
4.2 ppm N 6.6 ppm Ca |
|
1 lb |
Dry calcium nitrate |
6.1 ppm N 7.5 ppm Ca |
|
1 lb |
Calcium chloride |
14.3 ppm Ca |
|
1 quart |
Phosphoric acid |
30 ppm P |
|
1 gramz |
Solubor |
0.018 ppm B |
|
0.5 lb |
Fe 330 chelated iron |
2.0 ppm Fe |
|
100 grams |
S.T.E.M. |
0.12 ppm B 0.28 ppm Cu 0.66 ppm Fe 0.70 ppm Mn 0.0035 ppm Mo 0.39 ppm Zn |
|
1 gram |
Copper sulfate |
0.021 ppm Cu |
|
1 gram |
Manganese sulfate |
0.024 ppm Mn |
|
1 gram |
Zinc sulfate |
0.03 ppm Zn |
|
1 ml |
Liquid sodium molybdate |
0.02 ppm Mo |
|
1 gram |
Dry sodium molybdate |
0.03 ppm Mo |
|
1 lb |
Monopotassium Phosphate |
9 ppm P 11 ppm K |
|
zA gram scale or laboratory pipette will be needed to measure amounts of micronutrients or to calibrate a measuring spoon set to provide the correct amount of micronutrient materials. The following are some approximate equivalences for measuring dry fertilizer materials. |
|||
Approximate weight (grams) for several measuring utensils |
|||
Fertilizer |
1 teaspoon (level) |
1 tablespoon (level) |
one dry "ounce" in measuring cup |
Sequestrene Fe 330 |
4 |
14 |
20 |
Ammonium molybdate |
7 |
- |
- |
Sodium molybdate |
4 |
- |
- |
Solubor |
2 |
6 |
10 |
S.T.E.M. |
5 |
14 |
25 |
Manganese sulfate |
6 |
16 |
30 |
Zinc sulfate |
5 |
13 |
26 |
Copper sulfate |
7 |
20 |
35 |
Stage of growth |
|||||
1 |
2 |
3 |
4 |
5 |
|
Transplant to 1st cluster |
1st cluster to 2nd cluster |
2nd cluster to 3rd cluster |
3rd cluster to 5th cluster |
5th cluster to termination |
|
----------------------------------FORMULA 1------------------------------- |
|||||
A Stock |
3.3 ptsPhos. acid |
3.3 ptsPhos. acid |
3.3 ptsPhos acid |
3.3 ptsPhos. acid |
3.3 ptsPhos. acid |
6 lb. KCl10 lb. MgSO4 |
6 lb. KCl10 lb. MgSO4 |
6 lb. KCl10 lb. MgSO42 lb. KNO3 |
6 lb. KCl12 lb. MgSO42 lb. KNO3 |
6 lb. KCl12 lb. MgSO46 lb. KNO31 lb. NH4NO3 |
|
10 gr CuSO435 gr MnSO410 gr ZnSO440 gr Solubor3 ml Na Moly |
10 gr CuSO435 gr MnSO410 gr ZnSO440 gr Solubor3 ml Na Moly |
10 gr CuSO435 gr MnSO410 gr ZnSO440 gr Solubor3 ml Na Moly |
10 gr CuSO435 gr MnSO410 gr ZnSO440 gr Solubor3 ml Na Moly |
10 gr CuSO435 gr MnSO410 gr ZnSO440 gr Solubor3 ml Na Moly |
|
B Stock |
2.1 gal.Ca(NO3)2 |
2.4 gal.Ca(NO3)2 |
2.7 gal.Ca(NO3)2 |
3.3 gal.Ca(NO3)2 |
3.3 gal.Ca(NO3)2 |
or 11.5 lb dryCa(NO3)2 |
or 13.1 lb dryCa(NO3)2 |
or 14.8 lb dryCa(NO3)2 |
or 18.0 lb dryCa(NO3)2 |
or 18.0 lb dryCa(NO3)2 |
|
0.7 lb Fe 330 |
0.7 lb Fe 330 |
0.7 lb Fe 330 |
0.7 lb Fe 330 |
0.7 lb Fe 330 |
|
----------------------final concentrations (ppm)------------------------ |
|||||
N |
70 |
80 |
100 |
120 |
153 |
P |
50 |
50 |
50 |
50 |
50 |
K |
119 |
119 |
148 |
148 |
206 |
Ca |
111 (86)z |
127 (98) |
143 (111) |
174 (135) |
174 (135) |
Mg |
40 |
40 |
40 |
48 |
48 |
S |
56 |
56 |
56 |
66 |
66 |
Fe |
2.8 |
2.8 |
2.8 |
2.8 |
2.8 |
Cu |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
Mn |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
Zn |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
B |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
Mo |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
---------------------------------FORMULA 2------------------------------- |
|||||
A Stock |
3.3 ptsPhos. acid |
3.3 ptsPhos. acid |
3.3 ptsPhos. acid |
3.3 ptsPhos. acid |
3.3 ptsPhos. acid |
6 lb KCl10 lb. MgSO4 |
6 lb KCl10 lb. MgSO4 |
6 lb KCl10 lb. MgSO42 lb. KNO3 |
6 lb KCl12 lb. MgSO42 lb. KNO3 |
6 lb KCl12 lb. MgSO46 lb. KNO31 lb. NH4NO3 |
|
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
|
B Stock |
2.1 galCa (NO3)2 |
2.4 galCa (NO3)2 |
2.7 galCa (NO3)2 |
3.3 galCa (NO3)2 |
3.3 galCa (NO3)2 |
or 11.5 lb dryCa (NO3)2 |
or 13.1 lb dryCa (NO3)2 |
or 14.8 lb dryCa (NO3)2 |
or 18.0 lb dryCa (NO3)2 |
or 18.0 lb dryCa (NO3)2 |
|
0.5 lb Fe 330 |
0.5 lb Fe 330 |
0.5 lb Fe 330 |
0.5 lb Fe 330 |
0.5 lb Fe 330 |
|
---------------------------final concentrations (ppm)-------------------------- |
|||||
N |
70 |
80 |
100 |
120 |
150 |
P |
50 |
50 |
50 |
50 |
50 |
K |
119 |
119 |
148 |
148 |
206 |
Ca |
111(86)z |
127(98) |
143(111) |
174(135) |
174(135) |
Mg |
40 |
40 |
40 |
48 |
48 |
S |
56 |
56 |
56 |
66 |
66 |
Fe |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
Cu |
0.28 |
0.28 |
0.28 |
0.28 |
0.28 |
Mn |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
Zn |
0.39 |
0.39 |
0.39 |
0.39 |
0.39 |
B |
0.84 |
0.84 |
0.84 |
0.84 |
0.84 |
Mo |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
---------------------------------FORMULA 3--------------------------------- |
|||||
A Stock |
5.5 lb KH2PO44 lb KNO310 lb MgSO4 |
5.5 lb KH2PO44 lb KNO310 lb MgSO4 |
5.5 lb KH2PO45 lb KNO310 lb MgSO41 lb KCl |
5.5 lb KH2PO48 lb KNO312 lb MgSO41 lb KCl |
5.5 lb KH2PO48 lb KNO312 lb MgSO41 lb KCl2 lb NH4NO3 |
10 gr Cu SO435 gr Mn SO410 gr Zn SO440 gr Solubor3 ml Na Moly |
10 gr Cu SO435 gr Mn SO410 gr Zn SO440 gr Solubor3 ml Na Moly |
10 gr Cu SO435 gr Mn SO410 gr Zn SO440 gr Solubor3 ml Na Moly |
10 gr Cu SO435 gr Mn SO410 gr Zn SO440 gr Solubor3 ml Na Moly |
10 gr Cu SO435 gr Mn SO410 gr Zn SO440 gr Solubor3 ml Na Moly |
|
B Stock |
1.5 galCa(NO3)2 |
1.8 galCa(NO3)2 |
2.2 galCa(NO3)2 |
2.4 galCa(NO3)2 |
2.5 galCa(NO3)2 |
or 8.2 lb dryCa(NO3)2 |
or 9.8 lb dryCa(NO3)2 |
or 12.3 lb dryCa(NO3)2 |
or 13.1 lb dryCa(NO3)2 |
or 13.7 lb dryCa(NO3)2 |
|
0.7 lb Fe 330 |
0.7 lb Fe 330 |
0.7 lb Fe 330 |
0.7 lb Fe 330 |
0.7 lb Fe 330 |
|
------------------------final concentrations (ppm)---------------------- |
|||||
N |
70 |
80 |
100 |
120 |
150 |
P |
50 |
50 |
50 |
50 |
50 |
K |
119 |
119 |
153 |
153 |
196 |
Ca |
79(61)z |
94(74) |
118(92) |
126(98) |
131(103) |
Mg |
40 |
40 |
40 |
48 |
48 |
S |
56 |
56 |
56 |
66 |
66 |
Fe |
2.8 |
2.8 |
2.8 |
2.8 |
2.8 |
Cu |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
Mn |
0.8 |
0.8 |
0.8 |
0.8 |
0.8 |
Zn |
0.3 |
0.3 |
0.3 |
0.3 |
0.3 |
B |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
Mo |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
----------------------------FORMULA 4---------------------------- |
|||||
A Stock |
3.3 ptsPhos. acid8.3 lb. KNO310 lb. MgSO4 |
3.3 ptsPhos. acid8.3 lb. KNO310 lb. MgSO4 |
3.3 ptsPhos. acid10.3 lb. KNO310 lb. MgSO4 |
3.3 ptsPhos. acid10.3 lb. KNO312 lb. MgSO4 |
3.3 ptsPhos. acid13.8 lb. KNO312 lb. MgSO4 |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
100 gr. S.T.E.M.40 gr. Solubor3 ml Na Moly |
|
B Stock |
6.7 pt.Ca(NO3)2 |
9 pt.Ca(NO3)2 |
11.4 pt.Ca(NO3)2 |
2 gal.Ca(NO3)2 |
2.4 gal.Ca(NO3)2 |
or 4.6 lb. dryCa(NO3)2 |
or 6.2 lb. dryCa(NO3)2 |
or 7.9 lb. dryCa(NO3)2 |
or 11.1 lb. dryCa(NO3)2 |
or 13.3 lb. dryCa(NO3)2 |
|
0.7 lb. Fe 330 |
0.7 lb. Fe 330 |
0.7 lb. Fe 330 |
0.7 lb. Fe 330 |
0.7 lb. Fe 330 |
|
---------------------final concentrations (ppm)------------------------ |
|||||
N |
70 |
80 |
100 |
120 |
150 |
P |
50 |
50 |
50 |
50 |
50 |
K |
120 |
120 |
150 |
150 |
200 |
Ca |
44(35)z |
59(47) |
75 (59) |
105 (83) |
127 (100) |
Mg |
40 |
40 |
40 |
48 |
48 |
S |
56 |
56 |
56 |
67 |
67 |
Fe |
2.7 |
2.7 |
2.7 |
2.7 |
2.7 |
Cu |
0.28 |
0.28 |
0.28 |
0.28 |
0.28 |
Mn |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
Zn |
0.39 |
0.39 |
0.39 |
0.39 |
0.39 |
B |
0.84 |
0.84 |
0.84 |
0.84 |
0.84 |
Mo |
0.06 |
0.06 |
0.06 |
0.06 |
0.06 |
ZNumbers in parentheses are the ppm Ca when dry Ca(NO3)2 is used instead of liquid.NOTE: Calculations in above table are for amount of fertilizer material in 30-gal stock tanks and then for a 1:100 (1 gal each stock in 100 gals final nutrient solution). Fertilizer amounts placed in each stock tank will need be doubled if proportioner (1:100) pumps are installed in parallel in same incoming water line.Ca, Mg, and S values will vary upwards depending on the amount of Ca and Mg coming from the water source, and the amount of S coming from the sulfuric acid used for acidification. |
1. This document is HS796, one of a series of the Department of Horticultural Sciences, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: October, 1990 as SSVEC44. Revision date: August 2001. Reviewed November 2008. Please visit the EDIS Web site at http://edis.ifas.ufl.edu.
2. George J. Hochmuth, associate dean for research and associate director, Florida Agricultural Experiment Station, Robert C. Hochmuth, agent IV, North Florida Research and Education Center - Suwannee Valley, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 32611.The Institute of Food and Agricultural Sciences (IFAS) is an Equal
Opportunity Institution authorized to provide research, educational
information and other services only to individuals and institutions
that function with non-discrimination with respect to race, creed,
color, religion, age, disability, sex, sexual orientation, marital
status, national origin, political opinions or affiliations.
For more information on obtaining other extension publications,
contact your county Cooperative Extension service.
U.S. Department of Agriculture, Cooperative Extension Service,
University of Florida, IFAS, Florida A. & M. University Cooperative
Extension Program, and Boards of County Commissioners Cooperating. Millie Ferrer, Interim Dean.