Search Result
Data
Chemical and microbiological properties of soils in the Andrews Experimental Forest (1994 REU Study)
To conduct a comprehensive study of soil chemical and microbiological properties at the HJA during the week of July 11,1994.
DB Code: SP006
Study date: July 11, 1994 to July 15, 1994
Data
This study was designed to determine how edges generated by clear-cutting old-growth forests influence patterns of soil carbon and nitrogen cycling and the distribution of...
DB Code: SP007
Study date: January 01, 1995 to December 01, 1995
Data
This study was conducted in different regions to determine if climatic regimes alter the effects of thinning pole stands. Forest managers are currently faced with increasingly...
DB Code: SP008
Study date: January 01, 1994 to January 01, 1996
Data
The main objective of this study was to determine if there were relationships between forest floor attributes such as the location of: (1) individual trees, (2) clusters of...
DB Code: SP009
Study date: July 01, 1994 to July 31, 1995
Data
The 1993 (SP005) sampling grid was expanded to 183 sites providing a more comprehensive sampling grid. Because of potential edge effects problems, all sample locations were moved...
DB Code: SP010
Study date: September 15, 1994 to December 07, 1995
Data
This study represents only one portion of a much larger study involving a wide range of disciplines and several H.J. Andrews Forest researchers. This dataset represents all the...
DB Code: SP012
Study date: June 06, 1999 to July 07, 2000
Data
Soil organic carbon (SOC, kg C m-2) is an important component in evaluating global C stores. The nitrogen (TN, kg N m-2) cycle is closely linked to C and understanding its role...
DB Code: SP013
Study date: June 16, 1995 to September 30, 1995
Data
Seasonal soil respiration using permanent gas chambers in the Andrews Experimental Forest, 1994-1996
The overall objective of this study is to model CO2 emissions from forest soils of the H. J. Andrews Experimental Forest. The data to develop this model was obtained by measuring...
DB Code: SP014
Study date: November 01, 1994 to November 01, 1996
Data
Measurements were made along transects running from mountain meadows, into transition zones where trees were invading meadows and then into mature forest to determine if the...
DB Code: SP016
Study date: January 07, 1998 to January 09, 1998
Data
This is the first of three tree-fall gap studies conducted at the H.J. Andrews Experimental Forest addressing the effects of tree-fall gaps on forest soil characteristics. The...
DB Code: SP017
Study date: January 07, 1995 to January 08, 1995
Data
This was the second in a series of tree-fall gap studies conducted at the HJA addressing the effects of tree-fall gaps on forest soil characteristics. The first looked at the...
DB Code: SP018
Study date: July 01, 1997 to July 24, 1997
Data
This is the third and final study in a series of tree-fall gap studies conducted at the HJA addressing the effects of tree-fall gaps on forest soil characteristics. The first...
DB Code: SP019
Study date: June 25, 1999 to July 18, 1999
Data
This is the third and final data set in a series of basin-scale summer forest soil surveys. We conducted soil survey in 1998 designed to provide an accurate assessment of soil...
DB Code: SP020
Study date: June 15, 1998 to July 07, 1998
Data
To better understand the effects vegetation has on forest soils, we established a number of sampling transects running from old-growth (OG) forests into stands with different...
DB Code: SP021
Study date: July 01, 1996 to September 30, 1996
Data
This study was designed to determine if ectomycorrhizal mats are more likely to be present in soils at the base of common understory trees than in soils distant from trees and to...
DB Code: SP022
Study date: January 07, 1992 to January 07, 1994
Data
Soils map of the H J Andrews Exp Forest modified from 1964 soil survey. Joel Nordgen and Ted Dyrness collected additional field data in 1993 and 1994. Joel Nordgen revised the...
DB Code: SP026
Study date: January 04, 1991 to August 15, 1996
Data
This layer contains the delineations of the soil landtype mapping units defined in the 1992 update to the SRI (Soil Resource Inventory)
The mapping units are derived and defined...
DB Code: SP027
Study date: June 01, 1992
Data
Soils synoptic sampling grid (REU sites) site locations at the Andrews Experimental Forest are mapped. GPS coordinates were used to generate sample locations from a synoptic soil...
DB Code: SP028
Study date: July 01, 1993 to July 06, 2005
Data
The main objective of this study was to determine if there were relationships between forest floor attributes such as the location of: (1) individual trees, (2) clusters of...
DB Code: SP029
Study date: January 07, 1994 to July 30, 1995
Data
Ectomycorrhizal mats in forest soils have a wide global distribution and are apparently important to nutrient cycling. Since little known about the factors influencing their...
DB Code: SP030
Study date: July 01, 1992 to June 20, 2005
Data
Comparisons of respiration rate and environmental variables for mat and non-mat soil were conducted between July 2008 to Nov 2009 in a 0.1ha plot adjacent lower Lookout Creek,...
DB Code: SP033
Study date: July 01, 2008 to November 30, 2009
Data
Public communications of the H.J. Andrews Experimental Forest were compiled and examined to provide basic information on the outreach program from the Andrews Forest, including...
DB Code: SS001
Study date: January 01, 1980 to June 09, 2002
Data
This dataset was developed for use in an analysis of landcover change in the McKenzie Basin for the Maps and Locals (MALS) project. MALs is funded by LTER Social Science...
DB Code: SS002
Study date: April 20, 2009 to August 23, 2013
Data
Pre- and post-HJA Day surveys were designed to help understand visitor experiences and thoughts about HJA Day 2014. A combined total of 136 individuals registered for HJA Day 2014...
DB Code: SS003
Study date: June 02, 2014 to July 31, 2014
Data
This work highlights the normative dimensions of “ecological forestry,” a strategy of forest management that uses silviculture to mimic the effects
of non-anthropogenic processes...
DB Code: SS004
Study date: May 01, 2014 to June 04, 2015