Structure, composition and concentration of dissolved organic matter in forest soil solutions

acide organique acidification agua del suelo analyse de sol arenosol arenosoles arenosols azote carbon carbone carbono dissolution dissolving eau du sol espectroscopia rmn forest ecology forest soils histosol histosoles histosols humus nitrogen nmr spectroscopy noruega norway organic acids organic compounds podzol podzoles podzols soil organic matter soil solution soil testing soil water soluciones del suelo solution du sol spectroscopie rmn suecia suelo forestal sweden