Interpretive Nutrient Levels for Plant Analysis
Onion, Any
| Low | Normal | High | Excessive | |
|---|---|---|---|---|
| Nitrogen (% DW) | 4.50 |
5.00 |
6.01 |
9.99 |
| Phosphorus (% DW) | 0.25 |
0.35 |
0.51 |
3.00 |
| Potassium (% DW) | 3.50 |
4.00 |
5.51 |
9.99 |
| Calcium (% DW) | 0.80 |
1.00 |
2.01 |
6.00 |
| Magnesium (% DW) | 0.22 |
0.25 |
0.41 |
3.00 |
| Sulfur (% DW) | 0.30 |
0.50 |
1.01 |
2.00 |
| Manganese (ppm DW) | 30 |
50 |
251 |
750 |
| Iron (ppm DW) | 50 |
60 |
301 |
900 |
| Copper (ppm DW) | 8 |
15 |
36 |
125 |
| Boron (ppm DW) | 18 |
22 |
61 |
200 |
| Zinc (ppm DW) | 20 |
25 |
101 |
300 |
Ag Analytical Services Lab
Hours: Monday-Friday, 8:00 AM - 4:00 PM
- Email aaslab@psu.edu
- Office 814-863-0841
- Fax 814-863-4540
Ag Analytical Services Lab
Hours: Monday-Friday, 8:00 AM - 4:00 PM
- Email aaslab@psu.edu
- Office 814-863-0841
- Fax 814-863-4540
