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Plant Part: Youngest mature leaf
Sampling Procedure: Collect trifoliates from 15 to 20 plants. Start from top of plant and select leaves from the most recently expanded, fully mature trifoliate. Discard the petiole. Collect one set of trifoliate leaves per plant.
Analysis | Tissue Concentration Guidelines | |||||||
Low/Marginal Range | Sufficiency Range | Excessive, toxic? | ||||||
Nitrogen, % N | - | - | ||||||
Phosphorus, %P | - | - | ||||||
Potassium, % K | - | - | ||||||
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 | - | - |