Extractable NH4-N and NO3-N (2 N KCl), PO4-P
(0.025 N HCl) and pH (0.01 M CaCl2) were measured on soils from a
transect along the Dalton road. Sites are Gus Shaver flowering sites and
Arctic LTER sites.
Data set ID:
EML revision ID:
Cores from along the Dalton Highway
at site used by Gus Shaver for his flowering sites(see Shaver, G.R., et
al, 1986) were taken for extractions. Cores 5.46 cm in diameter were
taken to the frozen layer. Organic and mineral layers were separated and
measured in the lab. Most live plants material was removed before
extraction. For extractable NH4-N and NO3-N, 100 mls of KCl (2 N KCl)
was added to about 20 grams wet weight of homogenized soil. For PO4-P
100 mls of 0.025 N HCl was added to about 20 grams wet weight of
homogenized soil. KCl extracts were shaken for 4 hours while HCl
extracts were shaken for only 5 minutes. All extracts were immediately
filtered through Whatman No. 42 filter paper and anlyzed on a Technicon
AAII. To measure pH, 5 grams of soil in 25 mls of 0.01 M CaCl2 was used.
A subsample of soil was dryed at 50 degree C and used to convert the wet
weights to oven dry weights.
Notes: The Sag tussock cores were not measured. An
average bulk density from soils extracted in 1992 and 1993 from the same
plots was used.
Reference Citations: Shaver,G. R., N. Fetcher and F. S. Chapin,III.
1986. Growthand flowering in Eriophorum vaginatum: Annual and
latitudinal variation. Ecology, 67:1524-1535.
MOISTURE: (((weight of wet soil +tare)-(weight of dry soil + tare))/((weight of dry soil + tare)-tare))*100
NOTE: All missing values are indicated by a N/A
DATE RECEIVED: 31Jan96
DATA FILE ENTERED BY: Jim Laundre
DATA FILE VALIDATION: 31Jan96
Version 2: Translated metadata into Excel metada worksheet, added attribute table and title. Jan 2006 Jiml
Version 3: Added LTERNET Data Access server proxy for Excel and comma delimited data files.
Version 4: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 5: Updated units to current standards. Fixed discrepency with header variable names. Updated metadata form to newer version (without site sheet). CH 24 Jan 2013 Updated to newer metadata with site sheet. CH March 2013.
Version 6: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
Version 7: Changed Distribution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015