organic carbon [%]
carbon to nitrogen ratio [-]
nitrogen to phosphorus ratio [-]
nitrogen to potassium ratio [-]
nitrogen to magnesium ratio [-]
dry weight of 1000 needles [g]
dry weight of 100 leaves [g]
The dotted lines delimit the range of normal nutrition after Mellert & Göttlein (2012). Masses and concentrations were determined on foliar material dried at 65°C.