potato - haifa · pdf file11 0 4000 8000 12000 16000 20000 24000 6-8 leaves ½-1...
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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)
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