Requirements for the supply of nutrients in Norway spruce stands on soligenous peatland in West-Norway

abonos npk ash content calcio calcium carence du sol contenido de ceniza contenido de materia seca crecimiento croissance deficiencias del suelo dry matter content engrais npk feuille growth hojas leaves magnesio magnesium manganese manganeso noruega norway npk fertilizers nutrientes nutrients peat soils picea abies soil deficiencies sol tourbeux substance nutritive suelo turboso teneur en cendres