⇦ Back to Soil Fertility and Plant Nutrition Home
Plant Part: Most recently matured leaves without petioles
Sampling Procedure: Collect 30 to 60 of the most recently mature leaves from mid-section of the primocane (first year, non-fruiting growth) about two weeks after berry harvest (normally in August). Mid-section leaves are usually the third to the fifth set of leaves back from the growing point or bud. Discard petioles. Keep the leaf blades.
Analysis | Tissue Concentration Guidelines | ||||||||
Low/Marginal Range | Sufficiency Range | Excessive, toxic? | |||||||
Nitrogen, % N | 1.80 | - | 2.00 | 2.00 | - | 3.80 | |||
Phosphorus, %P | 0.19 | - | 0.23 | 0.23 | - | 0.45 | |||
Potassium, % K | 1.10 | - | 1.45 | 1.45 | - | 2.50 | |||
Calcium, % Ca | 0.55 | - | 0.70 | 0.70 | - | 2.00 | |||
Magnesium, % Mg | 0.24 | - | 0.32 | 0.32 | - | 0.80 | |||
Sulfur, % S | 0.17 | - | 0.20 | 0.20 | - | 0.45 | |||
Zinc, ppm Zn | 15 | - | 18 | 18 | - | 75 | |||
Iron, ppm Fe | 45 | - | 55 | 55 | - | 200 | |||
Manganese, ppm Mn | 25 | - | 45 | 45 | - | 200 | |||
Copper ppm Cu | 4.0 | - | 7 | 7 | - | 35 | |||
Boron, ppm B | 25.0 | - | 28 | 28 | - | 70 | 250 | ||
Nitrogen-to-sulfur ratio (N:S) | 14 | - | 18 | 10 | - | 14 | |||
Sodium, % Na | 0.50 | ||||||||
Chloride, % Cl | |||||||||
Nitrate, ppm NO3-N | |||||||||
Phosphate, ppm PO4-P |
"Primocane" refers to the first-year, vegetative growth without flowers or fruit. "Floricane" refers to the second-year reproductive growth that flowers, fruits, dies, and then is pruned out.