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¶ Cantaloupe (Cucumis melo)
| Table No: | Growth stage: | Plant part: |
| Table A | Early growth | 5th leaf from tip |
| Table B | Flowering to early fruiting | 5th leaf from tip |
| Table C | Early fruiting to harvest | 5th leaf from tip |
| Table D | Flowering to early fruiting | Petiole |
¶ A: Early growth (less than 12 inch vines)
Plant Part: 5th leaf from tip
Sampling Procedure: Collect leaf blades from 25 to 30 plants. Discard petiole. At least a pint of loosely packed tissue (a ball about 4 to 5 inches in diameter) should be submitted for analysis. Place sample in a paper bag, not a plastic bag, for shipment to the laboratory.
| Analysis | Tissue Concentration Guidelines | ||||||||
| Low/Marginal Range | Sufficiency Range | Excessive, toxic? | |||||||
| Nitrogen, % N | 4.00 | - | 4.50 | 4.50 | - | 5.50 | |||
| Phosphorus, %P | 0.35 | - | 0.40 | 0.40 | - | 0.80 | |||
| Potassium, % K | 2.00 | - | 3.00 | 3.00 | - | 6.00 | |||
| Calcium, % Ca | 1.80 | - | 2.30 | 2.30 | - | 3.50 | |||
| Magnesium, % Mg | 0.30 | - | 0.35 | 0.35 | - | 0.70 | |||
| Sulfur, % S | 0.20 | - | 0.25 | 0.25 | - | 1.20 | |||
| Zinc, ppm Zn | 15 | - | 20 | 20 | - | 80 | 250 | ||
| Iron, ppm Fe | 40 | - | 50 | 50 | - | 250 | 1000* | ||
| Manganese, ppm Mn | 20 | - | 25 | 25 | - | 150 | 400 | ||
| Copper ppm Cu | 4 | - | 6 | 6 | - | 15 | 50 | ||
| Boron, ppm B | 20 | - | 25 | 25 | - | 70 | 150 | ||
| Nitrogen-to-sulfur ratio (N:S) | 8 | - | 12 | 12 | - | 15 | |||
| Sodium, % Na | 0.25 | - | 0.50 | ||||||
| Chloride, % Cl | 0.30 | - | 1.00 | ||||||
| Nitrate, ppm NO3-N | 1800 | - | 2000 | 2000 | - | 3000 | |||
| Phosphate, ppm PO4-P | 1300 | - | 1500 | 1500 | - | 3000 | |||
¶ Figure A.
¶ B: Flowering to early fruiting
Plant Part: 5th leaf from tip
Sampling Procedure: Collect leaf blades from 15 to 20 plants. Discard petiole. At least a pint of loosely packed tissue (a ball about 4 to 5 inches in diameter) should be submitted for analysis. Place sample in a paper bag, not a plastic bag, for shipment to the laboratory.
| Analysis | Tissue Concentration Guidelines | ||||||||
| Low/Marginal Range | Sufficiency Range | Excessive, toxic? | |||||||
| Nitrogen, % N | 3.50 | - | 4.00 | 4.00 | - | 5.00 | |||
| Phosphorus, %P | 0.25 | - | 0.30 | 0.30 | - | 0.65 | |||
| Potassium, % K | 1.50 | - | 2.30 | 2.30 | - | 4.00 | |||
| Calcium, % Ca | 1.80 | - | 2.30 | 2.30 | - | 3.50 | |||
| Magnesium, % Mg | 0.30 | - | 0.35 | 0.35 | - | 0.70 | |||
| Sulfur, % S | 0.20 | - | 0.25 | 0.25 | - | 1.20 | |||
| Zinc, ppm Zn | 20 | - | 25 | 25 | - | 100 | 250 | ||
| Iron, ppm Fe | 40 | - | 50 | 50 | - | 250 | 1000* | ||
| Manganese, ppm Mn | 20 | - | 50 | 50 | - | 200 | 400 | ||
| Copper ppm Cu | 5 | - | 7 | 7 | - | 20 | 50 | ||
| Boron, ppm B | 20 | - | 25 | 25 | - | 70 | 150 | ||
| Nitrogen-to-sulfur ratio (N:S) | 8 | - | 12 | 12 | - | 15 | |||
| Sodium, % Na | 0.25 | - | 0.50 | ||||||
| Chloride, % Cl | 0.30 | - | 1.00 | ||||||
| Nitrate, ppm NO3-N | 850 | - | 1000 | 1000 | - | 1500 | |||
| Phosphate, ppm PO4-P | 1200 | - | 1300 | 1300 | - | 1700 | |||
¶ Figure B.
¶ C: Early fruiting to harvest
Plant Part: 5th leaf from tip
Sampling Procedure: Collect leaf blades from 15 to 20 plants. Discard petiole. At least a pint of loosely packed tissue (a ball about 4 to 5 inches in diameter) should be submitted for analysis. Place sample in a paper bag, not a plastic bag, for shipment to the laboratory.
| Analysis | Tissue Concentration Guidelines | ||||||||
| Low/Marginal Range | Sufficiency Range | Excessive, toxic? | |||||||
| Nitrogen, % N | 3.00 | - | 3.50 | 3.50 | - | 4.50 | |||
| Phosphorus, %P | 0.20 | - | 0.30 | 0.30 | - | 0.70 | |||
| Potassium, % K | 1.30 | - | 2.00 | 2.00 | - | 3.00 | |||
| Calcium, % Ca | 1.20 | - | 1.75 | 1.75 | - | 2.50 | |||
| Magnesium, % Mg | 0.30 | - | 0.35 | 0.35 | - | 0.70 | |||
| Sulfur, % S | 0.18 | - | 0.23 | 0.23 | - | 1.00 | |||
| Zinc, ppm Zn | 20 | - | 25 | 25 | - | 100 | 250 | ||
| Iron, ppm Fe | 40 | - | 50 | 50 | - | 250 | 1000* | ||
| Manganese, ppm Mn | 20 | - | 50 | 50 | - | 200 | 400 | ||
| Copper ppm Cu | 5 | - | 7 | 7 | - | 20 | 50 | ||
| Boron, ppm B | 20 | - | 25 | 25 | - | 70 | 150 | ||
| Nitrogen-to-sulfur ratio (N:S) | 8 | - | 12 | 12 | - | 15 | |||
| Sodium, % Na | 0.25 | - | 0.50 | ||||||
| Chloride, % Cl | 0.30 | - | 1.00 | ||||||
| Nitrate, ppm NO3-N | 400 | - | 500 | 500 | - | 800 | |||
| Phosphate, ppm PO4-P | 800 | - | 1000 | 1000 | - | 1500 | |||
¶ Figure C.
¶ D: Flowering to early fruiting
Plant Part: Petiole
Sampling Procedure: Collect petioles from the 6th leaf from the growing tip. Collect petioles from 25 to 30 plants. At least a pint of loosely packed tissue (a ball about 4 to 5 inches in diameter) should be submitted for analysis. Place sample in a paper bag, not a plastic bag, for shipment to the laboratory.
| Analysis | Tissue Concentration Guidelines | ||||||||
| Low/Marginal Range | Sufficiency Range | Excessive, toxic? | |||||||
| Nitrogen, % N | 1.80 | - | 2.00 | 2.00 | - | 3.00 | |||
| Phosphorus, %P | 0.15 | - | 0.20 | 0.20 | - | 0.35 | |||
| Potassium, % K | 2.50 | - | 3.00 | 3.00 | - | 5.00 | |||
| Calcium, % Ca | |||||||||
| Magnesium, % Mg | |||||||||
| Sulfur, % S | |||||||||
| Zinc, ppm Zn | |||||||||
| Iron, ppm Fe | |||||||||
| Manganese, ppm Mn | |||||||||
| Copper ppm Cu | |||||||||
| Boron, ppm B | |||||||||
| Nitrogen-to-sulfur ratio (N:S) | |||||||||
| Sodium, % Na | |||||||||
| Chloride, % Cl | |||||||||
| Nitrate, ppm NO3-N | |||||||||
| Phosphate, ppm PO4-P | |||||||||
¶ Figure D.
Petiole analysis results are best interpreted from trends over the growing season and not on results from a single sampling date. Results from a single sample may be affected by time of day, climatic conditions, plant stress, age, or disease, that are not directly related to fertility status. Nutrient concentrations are not uniform throughout the plant and may change as the tissue matures. Petiole analysis trends should be evaluated by variety, growing season, and yield/quality goals. Collecting petioles from the same location as soil samples allows comparison of soil nutrient availability with petiole nutrient status.
Note: Interpretations are based the relationship between nutrient levels in a particular part of a "standard" tissue in a specific time in the growing season. These plant tissue ranges and interpretations are not considered valid with plant parts or growth stages other than those specified. These interpretations are developed from data collected across a wide range of crop, soil, and climate conditions.
Results from a single sample may be affected by time of day, climatic conditions, plant stress, age, or disease, that are not directly related to fertility status. Nutrient concentrations are not uniform throughout the plant and may change as the tissue matures.Tissue analysis trends should be evaluated by variety, growing season, and yield/quality goals. Collecting plant samples from the same location as soil samples allows comparison of soil nutrient availability with plant nutrient status.Low nutrient levels may be due to deficiency or to dilution by intensive growth. High or excessive nutrient levels may be a sign of restricted growth allowing nutrients to accumulate in the plant tissue. Nutrient imbalance may be secondary to the primary problem.