Details

Autor(en) / Beteiligte

• Vogt, D J
• Edmonds, R L

Titel

Nitrate and ammonium levels in relation to site quality in Douglas-fir soil and litter [Pseudotsuga menziesii, Washington]

Ist Teil von

• Northwest science, 1982, Vol.56 (2), p.83-89

Erscheinungsjahr

1982

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Nitrate and ammonium levels in the L horizon and soil to a 5 cm depth were analyzed during the months of July and January in three different aged Douglas-fir (Pseudotsuga menziessi ) (Mirb.) Franco) Site Class II stands and four Site Class IV stands in western Washington. Litter and soil ammonium levels in the high site quality (II) stand were significantly different from those in the low site quality (IV) stands. In contrast, however, nitrate concentrations were significantly greater in the high site quality stands. Total N or C did not appear related to the net nirate differences observed between the high and low site quality stands.