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¶ Sugarcane (Saccharum officinarum)
¶ A: "Grand growth" period
Plant Part: Uppermost leaf blade
Sampling Procedure: Collect 15 to 20 of the uppermost leaf blades, which have a distinct collar on the stalk (termed "top-visible dewlap leaf"). Samples should be collected during the "grand growth" period, at least 3 to 5 months after planting. Nutrient levels change during the day. Early morning samples are preferred.
| Analysis | Tissue Concentration Guidelines | ||||||||
| Marginal Range | Sufficiency Range | Possibly oxic? | |||||||
| Nitrogen, % N | 1.80 | - | 2.00 | 2.00 | - | 2.60 | |||
| Phosphorus, %P | 0.18 | - | 0.22 | 0.22 | - | 0.30 | |||
| Potassium, % K | 0.90 | - | 1.10 | 1.10 | - | 1.60 | |||
| Calcium, % Ca | 0.17 | - | 0.20 | 0.20 | - | 0.50 | |||
| Magnesium, % Mg | 0.12 | - | 0.15 | 0.15 | - | 0.35 | |||
| Sulfur, % S | 0.15 | - | 0.18 | 0.18 | - | 0.25 | |||
| Zinc, ppm Zn | 15 | - | 20 | 20 | - | 50 | |||
| Iron, ppm Fe | 30 | - | 40 | 40 | - | 150 | 1000* | ||
| Manganese, ppm Mn | 12 | - | 15 | 15 | - | 150 | |||
| Copper ppm Cu | 4 | - | 5 | 5 | - | 10 | |||
| Boron, ppm B | 3 | - | 4 | 4 | - | 30 | |||
| Nitrogen-to-sulfur ratio (N:S) | - | - | |||||||
| Sodium, % Na | - | - | 0.25 | - | 0.50 | ||||
| Chloride, % Cl | - | - | 0.30 | - | 1.00 | ||||
¶ Figure A.
