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1
3
4
5
6
0
100
200
300
400
500
600
N P K Ca Mg
0
50
100
150
200
250
300
350
400
N
P
K
Bulking up KNO3
7
0
0.5
1
1.5
2
2.5
3
3.5
4
Cu Zn B Mn Fe
8
0
10
20
30
40
50
60
70
0 60 80 120 150
kg N /Ha
↑ ↑
↑ ↓ ↓
↑
↓ ↑ ↑
↓ ↑ ↑
↑ ↓
↑ ↓
↓ ↑
↑
9
0
0.2
0.4
0.6
0.8
1
1.2
0 2 4 6 8 10 12 14
Nitrate
Ammonium
10
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
120 180 240
80% Amm./ 20%Nitr.
50% Amm./ 50%Nitr.
20% Amm./80%Nitr.
11
0
4000
8000
12000
16000
20000
24000
6-8 leaves ½-1” tubers 1½-2” tubers Late season
Deficient
Warning
Adequate
Growth stage
Petiole nitrate
(ppm N-NO3)
12
38
39
40
41
42
43
44
45
15.5
16
16.5
17
17.5
18
13
Color rating
40
40.5
41
41.5
42
42.5
43
43.5
KCl SOP Multi-K
0
100
200
300
400
500
600
700
800
Multi-K
KCl
SOP
14
S.G.
0
1
2
3
4
5
6
0 2 4 6 8 10 12 14
KCl
SOP
Multi-K
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
2
