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

Address

111 Ag Analytical Services Lab
University Park, PA 16802
Directions

Hours: Monday-Friday, 8:00 AM - 4:30 PM

Ag Analytical Services Lab

Address

111 Ag Analytical Services Lab
University Park, PA 16802
Directions

Hours: Monday-Friday, 8:00 AM - 4:30 PM