Nutrient Sufficiency Ranges
(source: A & L, Agronomy Handbook, Ankerman & Large, Eds.)
|
N |
P |
K | Mg | Ca | S | Na | B | Zn | Mn | Fe | Cu |
Al |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
% |
ppm |
||||||||||||
|
From |
3.00 |
0.30 |
2.5 |
0.5 |
2.00 |
0.5 |
0.01 |
40 |
35 |
100 |
100 |
8 |
20 |
|
To |
6.00 |
0.80 |
5.00 |
1.00 |
6.00 |
0.9 |
0.01 |
60 |
50 |
200 |
200 |
20 |
200 |
Plant sampling
|
Growth stage |
Plant part to sample |
No. of plants or leaves to sample |
|
|---|---|---|---|
|
Open-field tomatoes |
Prior to or during early bloom stage | 3rd or 4th leaf from growing tip |
20-25 |
|
Greenhouse tomatoes |
Prior to or during fruit-set | Young plants: leaves adjacent to 2ndor 3rd cluster |
20-25 |
| Older plants: leaves from 4th to 6thclusters |
20-25 |
Need more information about how to grow tomato? You can always return to the tomato fertilizer & tomato crop guide table of contents
Read more about fertigation - application of nutrients through irrigation systems