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| Target values for slabwater analysis. |
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Find in the below table the recommended amount of nutrients in the slabwater for a tomato- or cucumber crop in the production phase. Note that the recommended composition of nutrients during the initial growth is differetn - contact your advisor. Also note that some varieties demand special treatment deviating from the standards in the table.
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Tomato, slabwater
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Minimum |
Optimum |
Maximum |
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pH |
5,0 |
5,5 |
6,5 |
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EC (mS/cm) |
2,5 |
3,2 |
4,0 |
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N (ppm) |
180 |
240 |
295 |
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P (ppm) |
20 |
30 |
40 |
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K (ppm) |
195 |
255 |
310 |
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Ca (ppm) |
200 |
250 |
320 |
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Mg (ppm) |
60 |
80 |
110 |
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S (ppm) |
110 |
155 |
210 |
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Fe (ppm) |
1,50 |
2,00 |
2,50 |
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Mn (ppm) |
0,50 |
1,00 |
1,50 |
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Cu (ppm) |
0,10 |
0,15 |
0,20 |
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Zn (ppm) |
0,30 |
0,45 |
0,60 |
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B (ppm) |
0,25 |
0,40 |
0,50 |
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Mo (ppm) |
0,03 |
0,05 |
0,08 |
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Na (ppm) |
25 |
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180 |
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Cl (ppm) |
35 |
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280 | |
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Cucumber, slabwater
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Minimum |
Optimum |
Maximum |
| pH |
5,0 |
5,6 |
6,2 |
| EC (mS/cm) |
2,0 |
2,5 |
3,0 |
| N (ppm) |
190 |
225 |
260 |
| P (ppm) |
30 |
45 |
60 |
| K (ppm) |
230 |
290 |
350 |
| Ca (ppm) |
150 |
215 |
280 |
| Mg (ppm) |
35 |
60 |
85 |
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S (ppm) |
60 |
105 |
150 |
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Fe (ppm) |
1,50 |
2,00 |
2,50 |
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Mn (ppm) |
0,60 |
1,10 |
1,50 |
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Cu (ppm) |
0,10 |
0,20 |
0,30 |
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Zn (ppm) |
0,20 |
0,40 |
0,60 |
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B (ppm) |
0,30 |
0,50 |
0,60 |
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Mo (ppm) |
0,03 |
0,05 |
0,08 |
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Na (ppm) |
0 |
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200 |
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Cl (ppm) |
0 |
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300 | |
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