Organic nitrogen in potassium chloride extracts of histosols in the PhilippinesK LSahrawatauthorAnalyses of 2M KCl extracts of four Histosols (Tropohemists) in aerobic and anaerobic states showed that they contained significant amounts of organic N (21–102 mg N/kg of soil) but that the amounts were higher in anaerobic samples (following 4 weeks incubation under waterlogged conditions). It is suggested that the amounts of organic N extracted by KCl and other salt solutions should be taken into account along with mineral N estimation to avoid error in measuring potentially mineralizable N in Histosols of tropical lowlands.Soil ScienceFertilizer Applications1983ElsevierArticle