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Fertilizer Recommendation Tables
- 2010 Revision
2010 Revision
Potassium Requirement Table - Vegetables on Mineral Soils
Potash (K2O) Required - kg/ha
Soil potassium, (1 M ammonium
acetate extract)mg
K L-1 of soil (ppm K) |
Radish |
Snap bean, lima beans,
field beans, soybeans, peas |
Sweet
corn |
Sugar
beet*** |
Tomato(paste, fresh market)Cucumber,
muskmelon, watermelon, pumpkin, squash, ginseng |
| 0‑15 |
60 HR
|
120 HR
|
170 HR
|
180 HR
|
230 HR
|
| 16‑30 |
60 HR
|
110 HR
|
160 HR
|
170 HR
|
220 HR
|
| 31‑45 |
50 HR
|
90 HR
|
140 HR
|
160 HR
|
200 HR
|
| 46‑60 |
50 HR
|
80 HR
|
110 HR
|
140 HR
|
180 HR
|
| 61‑80 |
40 MR
|
60 MR
|
80 HR
|
120 HR
|
140 HR
|
| 81‑100 |
30 MR
|
40 MR
|
50 MR
|
90 MR
|
100 HR
|
| 101-129 |
30 MR
|
30 MR
|
30 MR
|
70 MR
|
70 MR
|
| 121-150 |
20 MR
|
0 LR
|
0 LR
|
20 MR
|
50 MR
|
| 151-180 |
20 MR
|
0 RR
|
0 RR
|
0 LR
|
40 MR
|
| 181-210 |
0 LR
|
0 RR
|
0 RR
|
0 LR
|
0 LR
|
| 211-250 |
0 RR
|
0 RR
|
0 RR
|
0 RR
|
0 RR
|
| 250+ |
0 NR*
|
0 NR*
|
0 NR*
|
0 NR*
|
0 NR*
|
Potash (K2O) Required - kg/ha
Soil potassium, (1 M ammonium
acetate extract)mg
K L-1 of soil (ppm K) |
Beet, onion, spinach, lettuce,
endive, garlic, chive, carrot, horseradish, parsnip, potato, garden |
Broccoli, brussels sprout,
cabbage, cauliflower, pepper, eggplant |
Rutabaga**, turnip,
celery, rhubarb |
Asparagus
(all plantings) |
Tomato
(whole pack)** |
| 0‑15 |
230 HR
|
270 HR
|
340 HR
|
420 HR
|
660 HR
|
| 16‑30 |
220 HR
|
250 HR
|
330 HR
|
400 HR
|
640 HR
|
| 31‑45 |
210 HR
|
230 HR
|
310 HR
|
360 HR
|
600 HR
|
| 46‑60 |
190 HR
|
200 HR
|
280 HR
|
320 HR
|
560 HR
|
| 61‑80 |
160 HR
|
170 HR
|
250 HR
|
280 HR
|
480 HR
|
| 81‑100 |
130 HR
|
130 HR
|
200 HR
|
250 HR
|
400 HR
|
| 101-120 |
100 MR
|
100 MR
|
150 MR
|
220 HR
|
340 MR
|
| 121-150 |
80 MR
|
80 MR
|
90 MR
|
190 MR
|
300 MR
|
| 151-180 |
50 MR
|
50 MR
|
50 MR
|
160 MR
|
280 MR
|
| 181-210 |
0 LR
|
0 LR
|
0 LR
|
130 MR
|
140 MR
|
| 211-250 |
0 RR
|
0 RR
|
0 RR
|
80 MR
|
70 MR
|
| 250+ |
0 NR*
|
0 NR*
|
0 NR*
|
0 LR
|
0 LR
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* adding nutrients to soils with these levels of nutrients may reduce
crop yields or quality by interfering with the uptake of other nutrients.
** For whole pack tomatoes and rutabagas on soils with magnesium tests
less than 100 the required amount of potash should be adjusted downward
from the amounts shown to a minimum rate of 50% of table values at a magnesium
test of 50. Fertilizer rates in this table are designed to produce highest
economic yields when accompanied by good or above average management.
*** Excess application of potassium will lead to luxury consumption by
the sugar beet plant. This has a negative effect upon clear juice purity.
HR, MR, LR, RR, and NR denote, respectively, high, medium, low, rare
and no probabilities of profitable crop response to applied nutrient.
Approved: Ontario Soil Management Research and Services Committee
(June 2010)
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
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