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Fern, Boston

Interpretive Nutrient Levels for Plant Analysis

Fern, Boston


Low Normal High Excessive
Nitrogen (% DW) 1.50
2.10
3.00
5.00
Phosphorus (% DW) 0.15
0.25
0.70
1.00
Potassium (% DW) 1.00
1.60
3.80
6.00
Calcium (% DW) 0.25
0.40
2.50
4.00
Magnesium (% DW) 0.15
0.25
1.00
1.50
Sulfur (% DW) 0.10
0.20
0.50
0.75
Manganese (ppm DW) 15
27
200
500
Iron (ppm DW) 15
28
300
1000
Copper (ppm DW) 4
6
32
50
Boron (ppm DW) 10
20
70
100
Zinc (ppm DW) 10
33
65
100