The influence of fertilisation on foliar nutrients for Scots pine (Pinus sylvestris L.), 24 years after fertilisation with NPK and PK, of a drained and planted low sedge mire

abonos npk arbre forestier azote calcio calcium carence du sol deficiencias del suelo engrais npk fertilisation fertilizer application feuille forest trees fosforo hojas leaves magnesio magnesium nitrogen npk fertilizers nutrition des plantes phosphore phosphorus pinus sylvestris plant nutrition potasio potassium soil deficiencies