Interpretive Nutrient Levels for Plant Analysis
Bird's-foot Trefoil, Any
| Low | Normal | High | Excessive | |
|---|---|---|---|---|
| Nitrogen (% DW) | 3.00 |
4.00 |
4.50 |
6.00 |
| Phosphorus (% DW) | 0.20 |
0.28 |
0.36 |
0.50 |
| Potassium (% DW) | 1.25 |
1.60 |
2.60 |
3.50 |
| Calcium (% DW) | 1.30 |
1.70 |
2.00 |
3.00 |
| Magnesium (% DW) | 0.20 |
0.40 |
0.60 |
1.00 |
| Sulfur (% DW) | 0.20 |
0.25 |
0.50 |
0.80 |
| Manganese (ppm DW) | 20 |
50 |
80 |
250 |
| Iron (ppm DW) | 20 |
30 |
250 |
500 |
| Copper (ppm DW) | 3 |
6 |
10 |
50 |
| Boron (ppm DW) | 15 |
30 |
75 |
100 |
| Zinc (ppm DW) | 15 |
30 |
50 |
100 |
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
