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Ministry of Forests E.P. 886.13 was established by silviculture researcher Robert Brockley between 1992 and 1999, and consisted of 8 installations across the interior which shared the same experimental design. Five involved lodgepole pine and three involved interior spruce. Complete descriptions of the site characteristics, experimental treatments, and early results are given by:
Brockley, R.P. and D.G. Simpson. 2004. Effects of intensive fertilization on the foliar nutrition and growth of young lodgepole pine and spruce forests in the interior of British Columbia (E.P. 886.13): Establishment and progress report. Technical Report 018. B.C. Ministry of Forests., Research Branch, Victoria, B.C. http://www.for.gov.bc.ca/hfd/pubs/Docs/Tr/Tr018.htm

The key difference between E.P. 886.13 and other lodgepole pine fertilization studies in the BC interior was the inclusion of two treatments involving annual fertilizer applications; see Brockley and Simpson (2004) for full details.

Early tree responses to the fertilization treatments at two lodgepole pine installations, including Kenneth Creek, were presented in:
Amponsah, I.G., P. G. Comeau, R.P. Brockley, and V.J. 2005. Effects of repeated fertilization on needle longevity, foliar nutrition, effective leaf area index, and growth characteristics of lodgepole pine in interior British Columbia, Canada. Canadian Journal of Forest Research 35: 440 – 451. https://doi.org/10.1139/x04-200

Prior to his retirement, Brockley published a comprehensive report on the results of the lodgepole pine installations in this study:
Brockley, R.P. 2010. Effects of intensive fertilization on the foliar nutrition and growth of young lodgepole pine forests in the British Columbia Interior: 12-year results. Technical Report 058. B.C. Ministry of Forests and Range., Forest Science Program, Victoria, B.C. http://www.for.gov.bc.ca/hfd/pubs/Docs/Tr/Tr058

The Kenneth Creek installation, approximately 60 km ESE of Prince George, was established in 1993 in a 10-year-old lodgepole pine plantation. [Note that this site is also referred to as the "Bowron" site in some documents and filenames.] The site was located on a flat glacial outwash terrace with fairly uniform deep sandy soils, and was extensive enough that it later hosted one of two installations of E.P. 886.15 established in 2001. (See https://search.nbca.unbc.ca/index.php/2023-2-2-1-3.) The Kenneth Creek site was attacked by mountain pine beetle in 2006, resulting in at least 80% tree mortality. In 2013, the stand was levelled in order to enable replanting.

Dr. Paul Sanborn's involvement in this study addressed three aspects of soil and nutrient cycling responses to the fertilization treatments:

1. mineral soil and forest floor nutrient stocks, (Sub-subseries 2023.2.2.15.1)
2. litterfall amounts and chemical composition, and, (Sub-subseries 2023.2.2.15.2)
3. litter decomposition. (Sub-subseries 2023.2.2.15.3)

The following Excel files are the primary lab reports from the Ministry of Forests analytical laboratory. At the time of this study, the lab reports would only use a minimal sample identification consisting of a sequential number (1, 2 … etc.) for each sample in a job. The submitter had to maintain their own records to link that sequential number in the report to something more meaningful – in this case, the tag number on the litterbag, the litter type, and the plot number – as recorded in my consolidated file Kenneth Creek Litterbag Sample Numbering.xlsx

• T458FINL.xls [Most of the data in this file – samples 7-31 – are for litter trap samples in the fall 1997 collection, but the first 6 are triplicate analyses of the initial pine needle litter materials used in the litterbags: #1-3 are Control, and #4-6 are ON2.]
• T483FINL.xls [Litterbags recovered May 5, 1998]
• T508FINL1.xls [Samples 19-42 are from the Kenneth Creek litterbags, recovered Oct. 20, 1998; samples 1-18 are from the EP 1148 (Bobtail) litterbag experiment, recovered Oct. 1998]
• T551FINL.xls [Litterbags recovered April 30, 1999]
• T589F.xls [Litterbags recovered October 12, 1999]
• T613FINL.xls [Litterbags recovered May 4, 2000]
• T650FINL.xls [Litterbags recovered October 11, 2000]
• T700FINL.xls [Litterbags recovered September 27 – October 5, 2001]
• T765FINL.xls [Litterbags recovered September 21, 2002]
• T830FINL.xls [Litterbags recovered October 15, 2003]
• T901FINL.xls [Litterbags recovered October 1, 2004]

Two files contain the complete records of initial litter materials and recovered litterbag contents, with some limited summaries of mean values by treatment and recovery date:

• BowDcomp.xls [complete record of weights of recovered litterbag contents in “Raw Data” tab]
• Bowron Litterbag Chemistry (update Aug 2010).xls [complete compilation of chemical analyses of initial and recovered litterbag materials]

This paper gives an overview of the experimental details and some preliminary results after recovery of the final set of litterbags.

Includes the following data sets from Kenneth Creek installation litterfall collection:

Traps were emptied 3 times per year (May, August, October) and the weights of the sorted contents of each trap were reported for each collection interval in these files:

• BOWAUG95.XLS
• BOWOCT95.XLS
• BOWMAY96.XLS
• BOWAUG96.XLS
• BOWOCT96.XLS
• BOWMAY97.XLS
• BOWAUG97.XLS
• BOWOCT97.XLS
• BOWMAY98.XLS
• BOWAUG98.XLS
• BOWOCT98.XLS
• BOWMAY99.XLS

Sorted litter trap materials – composited for each plot and sampling date – were submitted annually to the Ministry of Forests and Range Analytical Chemistry Laboratory for analysis. The following files provide the link between the sequential sample numbers used in the lab result reports and the records of sampling date, plot number, and material type:

• BOW95LIS.xls
• BOW96LIS.xls
• BOW97LIS.xls
• BOW98LIS.XLS
• BOW99LIS.XLS

The following files have the original lab reports in the “Raw Data” pane, and the lab data merged with the sample identification information in the “Labelled” pane:

• T368finl (May -Oct 1995).xls [August & October 1995 litter collections]
• T384finl (Oct 1995-May 1996).xls [May 1996 litter collection]
• T424finl (May-Oct 1996).xls [August & October 1996 litter collections]
• T442finl (Oct 1996-May 1997).xls [May 1997 litter collection; sample numbers shown in red indicate small samples, so micronutrient data may have lower accuracy]
• T458finl (May-Aug 1997.xls [August 1997 litter collection; samples #1-6 are the initial pine needle litter materials used in the companion litterbag decomposition experiment, with #1-3 = Control, #4-6 = ON2]
• T463finl (Aug-Oct 1997).xls [October 1997 litter collection]
• T488FINL (Oct 1997-May 1998).xls [May 1998 litter collection]
• T518finl (May-Aug 1998).xls [August 1998 litter collection]
• T530finl (Aug-Oct 1998).xls [October 1998 litter collection]
• T568FINL (Oct 1998-May 1999).xls [May 1999 litter collection]

Four files have annual summaries of litterfall amounts, element concentrations, and element fluxes by plot and treatment:

• Litterfall Summary 1995-96.xls
• Litterfall Summary 1996-97.xls
• Litterfall Summary 1997-98.xls
• Litterfall Summary 1998-99.xls

More compact tabular summaries of the litterfall and element fluxes over the 4-year period of monitoring are in:

• Litterfall Annual Flux Summary.xls
• Litterfall Annual Fluxes 1995-99 (Tables).xls

Three additional files provide pine foliar chemical data and preliminary estimates of the extent of element retranslocation from foliage prior to litterfall:

• Kenneth Creek (EP886.13) foliar data (1993-99) .xlsx
• Kenneth Creek nutrient retranslocation.xls
• Autumn foliage & needle litter comparison.xls

This document includes the figures to accompany the manuscript by Sanborn and Brockley entitled "Litterfall in a lodgepole pine fertilization experiment, Sub-Boreal Spruce zone, central interior British Columbia", which was submitted to the Canadian Journal of Forest Research but not accepted.

Includes the following graphs:

• Annual lodgepole pine needle litterfall by treatment (May 1995 – May 1999)
• Annual total litterfall by treatment (May 1995 – May 1999)
• Understory biomass components in July 1999

Item is the manuscript by Sanborn and Brockley entitled "Litterfall in a lodgepole pine fertilization experiment, Sub-Boreal Spruce zone, central interior British Columbia", which was submitted to the Canadian Journal of Forest Research but not accepted.

Includes the following data sets:

• 084996.CSV [whole-rock elemental analyses for < 2 mm fractions of C horizon of Kenneth Creek (KC) ( = “Bowron”) reference pedon; also includes data for C horizon of Holy Cross (HC) pedon related to E.P. 886.15 documented in https://www.for.gov.bc.ca/hfd/pubs/Docs/Tr/Tr020.htm ]
• 99-479ps.xls [particle size analysis (pipette method) data for plot composites of 1999 mineral soil samples by 0-20 cm and 20-40 cm depths]
• Kenneth Creek Db (1999).xls [bulk density data for 2 sampling locations per subplot = 8 per plot; cores collected at 10-14 cm (U) and 30-34 cm (L) depths]
• EP886.13 (Kenneth Ck) Db data.xls [provides additional detail on fine fraction and total bulk density along with plot and treatment means]
• Kenneth Creek pedon Db (2005).xls [bulk density data collected from the same pit where the “Bowron” pedon was sampled for Arocena and Sanborn (1999)]

The 1996 chemical data for forest floor and mineral soil (0-15 cm) are in:

• D96MIN1.xls
• D96MIN2.xls
• D96FOR1.xls
• D96FOR2.xls
  [In the “Installation” column, 1 = Sheridan Creek and 2 = Kenneth Creek.]

Consolidated versions of the 1996 data:

• EP886.13 Mineral Soil Chemistry (1996).xls
• EP886.13 Forest Floor Chemistry (1996).xls

The forest floor mass / area data are given in:

• Kenneth Creek 1999 Forest Floor Mass.xls
• Kenneth Creek 2005 forest floor mass.xls

Comparison of the 1999 and 2005 forest floor mass data is given by:

• Kenneth Creek 1999-2005 Forest Floor Mass Comparison.xls

The original laboratory data reports for 1999 identified the samples only with a sequential lab sample number (1-72). The complete sample identifications showing the lab sample number, plot, and sub-plot are in 1999 Soil Sample Lists.xls. For the 2005 samples, the laboratory data reports contain the complete identifying information.

• S370finl.xls [1999 mineral soil 0-20 cm]
• S371finl.xls [1999 mineral soil 20-40 cm]
• S375finl2.xls [1999 forest floor]
• S821finl.xls [2005 mineral soil 0-20 cm]
• S822finl.xls [2005 mineral soil 20-40 cm]
• S824finl.xls [2005 forest floor]

More complete versions of the soil chemical data with plot and treatment means, including calculations of elemental mass / hectare by plot and treatment (for 1999 only), are given in:

• EP886.13 Forest Floor Chemistry (1999).xls
• EP886.13 Mineral Soil Chemistry (1999) 0-20 cm.xls
• EP886.13 Mineral Soil Chemistry (1999) 20-40 cm.xls
• EP886.13 Forest Floor Chemistry (2005).xls
• EP886.13 Mineral Soil Chemistry (2005) 0-20 cm.xls
• EP886.13 Mineral Soil Chemistry (2005) 20-40 cm.xls

Calculations of carbon mass by plot and treatment (1999 only) are given in:

• EP886.13 Forest Floor Mass and Carbon Content (1999).xls
• EP886.13 Mineral Soil Carbon Content and Mass(1999).xls

Nutrient pools (kg/ha) are summarized by treatment (1999 only) in:

• Kenneth Creek Nutrient Pools Summary (1999).xls

This document describes in detail the field sampling and sample handling procedures as used in 1999 and 2005. It omits description of bulk density sampling as this was not repeated in 2005.

Includes the following data sets:

• LOGLBIOM.XLS [element concentrations for diameter classes of branches and bole cookies of sample living trees, Log Lake LTSPS site]
• Log Lake Biomass Nutrient Summary (1996).xls [mean values for element concentrations by species and diameter class]
• Skulbiom.xls [element concentrations for diameter classes of branches and bole cookies of sample living trees, Skulow Lake LTSPS site]
• Skulow Lake Biomass Nutrient Summary (1996).xls [mean values for element concentrations by species and diameter class]
• Toplbiom.xls [element concentrations for diameter classes of branches and bole cookies of sample living trees, Topley LTSPS site]
• Topley Biomass Nutrient Summary (1996).xls [mean values for element concentrations by species and diameter class]

Item is a 2000 fax of pre-harvest data tables from timber cruise report, including net merchantable volumes and stems/ha for Topley LTSPS plots.

Item is a March 1999 draft report by Paul Sanborn which was the working document on which the Research Note was based.

Item is an unpublished pre-harvest timber cruise report documenting standing timber volumes and site productivity at the Skulow Lake LTSPS site. The author is unknown and the work is undated.

A spinoff study was conducted in the late 1990s by the Ministry of Forests research soil scientists responsible for the three LTSPS installations in the Sub-Boreal Spruce zone: Paul Sanborn (Log Lake, Prince George Forest Region), Marty Kranabetter (Topley, Prince Rupert Forest Region), and Bill Chapman (Skulow Lake, Cariboo Forest Region). The objective was to estimate the potential nutrient losses resulting from differing levels of woody biomass removal in the LTSPS treatments.

Final results were published in:
Sanborn, P., M. Kranabetter, and B. Chapman. 2000. Nutrient removals in woody biomass: preliminary estimates from the Sub-Boreal Spruce Long-Term Soil Productivity Study. LTSPS Research Note #LTSPS-04. Prince George, Prince Rupert, and Cariboo Forest Regions, B.C. Ministry of Forests. 6 p. https://www.for.gov.bc.ca/hfd/pubs/Docs/Ltsps/Rrn004.htm

For this Northern Rockies pedological study, Dr. Paul Sanborn conducted field work jointly with researchers from the Ministry of Forests and Agriculture Canada from August 21-24, 2012, at two clusters of sites along the Alaska Highway west of Fort Nelson: near the Tetsa River crossing at km 585, and ~4.5 km west of Toad River at the "Poplars" campsite.

The focus of the study was on soils currently or recently containing permafrost as well as associated soils on nearby sites with warmer microclimates, with a total of 6 pedons described and sampled. One of these, an Organic Cryosol (pedon BC12-08), was documented in a short paper:

Sanborn, P., C. Bulmer, M. Geertsema, and S. Smith. 2022. A proposed Folic subgroup for the Organic Cryosols. Canadian Journal of Soil Science 102: 811–816. https://doi.org/10.1139/cjss-2021-0182

Associated soil microclimate monitoring occurred at this site, and is documented in:
Hasler A., Geertsema M., Foord V., Gruber S., Noetzli J. 2015. The influence of surface characteristics, topography and continentality on mountain permafrost in British Columbia. The Cryosphere 9: 1025–1038. https://doi.org/10.5194/tc-9-1025-2015

Some of the data from both papers was presented as a poster at the Canadian Society of Soil Science annual conference in 2013.

The highlights of the 2022 paper were presented at an online meeting of the Soil Classification Working Group of CSSS on January 20, 2023.

The sequence of site numbers is BC12-08, -09, (-10 was not used), -11, -12, -13, -14, and -15. Note that BC12-13 was described and sampled, but not photographed. An additional pedon designated as BC12-13A was located within ~10 m of BC12-13 on the same terrace, and had what appeared to be a buried fire-reddened layer under a possible buried Ah horizon. This pedon was photographed but not described or sampled.

File contains the following data sets:

• S1292Final.xlsx [chemical analysis data for mineral horizons, Ministry of Forests & Range, Analytical Chemistry Laboratory]
• S1293Final.xlsx [chemical analysis data for organic horizons, Ministry of Forests & Range, Analytical Chemistry Laboratory]
• B299530-R2013-02-18_15-47-21_N001.xls [particle size analysis data for mineral horizons, Maxxam Laboratories]
• B299530-R2013-02-18_15-47-21_R014.pdf [particle size analysis data for mineral horizons, Maxxam Laboratories]
• Northern Rockies 2012 sample list - Maxxam.xls [list of samples submitted to Maxxam Laboratories for particle size analysis; indicates which samples needed carbonate removal pretreatment]
• N Rockies 2012 - master data file.xlsx [working copy of combined chemical and particle size data in report format]

Image is a panoramic view of north-facing slope (sites BC12-08 and BC12-09) overlooking the Tetsa River crossing of the Alaska Highway, taken from across the valley.

Image is a panoramic view of north-facing slope (sites BC12-08 and BC12-09) overlooking the Tetsa River crossing of the Alaska Highway, taken from across the valley.

Image is a panoramic view of north-facing slope (sites BC12-08 and BC12-09) overlooking the Tetsa River crossing of the Alaska Highway, taken from across the valley.

Image is a panoramic view of north-facing slope (sites BC12-08 and BC12-09) overlooking the Tetsa River crossing of the Alaska Highway, taken from across the valley.