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Onion, Any

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