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¶ Mint (Menthus sp.)
¶ A: Growing Season
Plant Part: Upper stems, not including leaves
Sampling Procedure: Cut the top 6 inches of the stem below the shoot tip. Do not include leaves in the sample. Choose stems that receive adequate sunlight and have typical internode length. Do not sample shaded stems from deep within the plant canopy (near the ground) or upright, purplish stems that are budding or flowering on top of the canopy. At least a pint of loosely packed tissue (a ball about 4 to 5 inches in diameter) should be submitted for analysis.
| Analysis | Upper stem concentration guidelines | ||||||||
| Low | Marginal Range | Adequate | |||||||
| Nitrate, ppm NO3-N | |||||||||
| Early season | < 5000 | 5500 | - | 6000 | 6000 | - | 8000 | ||
| Near harvest | < 1500 | 1750 | - | 2000 | 2000 | - | 4000 | ||
¶ Figure A.
