Blacks Mountain Experimental Forest natural regeneration data (Lassen National Forest, California)

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Ritchie, Martin W.
Publication_Date: 2023
Title:
Blacks Mountain Experimental Forest natural regeneration data (Lassen National Forest, California)
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2023-0049
Description:
Abstract:
Forest stands at Blacks Mountain Experimental Forest (BMEF) in northeastern California have undergone changes since the establishment of the Experimental Forest in 1934. Twelve stands were selected exhibiting a range of past management activities to establish metrics describing tree density and stocking conditions in small trees (regeneration) at Blacks Mountain. Methods chosen for plot size and configuration were designed to be similar to those used in an earlier effort (in 1933 and 1934) that quantified trees less than 3.6 inches breast height diameter. We recorded seedling and sapling counts by species group and size class at BMEF in the summer and fall of 2018. In addition to the 2018 data, this data publication also includes the compartment summary data from 1933 and 1934. Data are provided as comma-separated values (CSV) files, but scanned field sheets from 2018 are provided as well as a scan of the work by R.H. Mors in 1936 as Portable Document Format (PDF) files. Also included are PDF files of all references noted in the methods section.
Purpose:
The observations on tree regeneration were undertaken to allow a spatial analysis of current tree density at the Experimental Forest (Nepal et al. 2020) as well as provide a means to compare with summaries recorded from the earlier (1933-1934) sampling effort.
Supplemental_Information:
For more information about these data and this study, see Nepal et al. (2020).
Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 1933
Single_Date/Time:
Calendar_Date: 1934
Single_Date/Time:
Calendar_Date: 2018
Currentness_Reference:
Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent:
Data were collected at the Blacks Mountain Experimental Forest in northeastern California.
Bounding_Coordinates:
West_Bounding_Coordinate: -121.1889
East_Bounding_Coordinate: -121.1348
North_Bounding_Coordinate: 40.7482
South_Bounding_Coordinate: 40.7013
Bounding_Altitudes:
Altitude_Minimum: 5600
Altitude_Maximum: 6900
Altitude_Distance_Units: feet
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Plant ecology
Theme_Keyword: Forest & Plant Health
Theme_Keyword: Natural Resource Management & Use
Theme_Keyword: Forest management
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: tree regeneration
Theme_Keyword: seedlings
Theme_Keyword: Pinus ponderosa
Theme_Keyword: ponderosa pine
Theme_Keyword: Jeffrey pine
Theme_Keyword: Pinus jeffreyi
Theme_Keyword: Abies concolor
Theme_Keyword: white fir
Theme_Keyword: Calocedrus decurrens
Theme_Keyword: incense-cedar
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Blacks Mountain Experimental Forest
Place_Keyword: California
Place_Keyword: Lassen National Forest
Place_Keyword: Lassen County
Taxonomy:
Keywords/Taxon:
Taxonomic_Keyword_Thesaurus:
None
Taxonomic_Keywords: multiple species
Taxonomic_Keywords: plants
Taxonomic_System:
Classification_System/Authority:
Classification_System_Citation:
Citation_Information:
Originator: ITIS
Publication_Date: 2023
Title:
Integrated Taxonomic Information System
Geospatial_Data_Presentation_Form: database
Other_Citation_Details:
Last retrieved [May, 1, 2023]
Online_Linkage: https://www.itis.gov
Taxonomic_Procedures:
Taxonomic_Classification:
Taxon_Rank_Name: Kingdom
Taxon_Rank_Value: Plantae
Applicable_Common_Name: plantes
Applicable_Common_Name: Planta
Applicable_Common_Name: Vegetal
Applicable_Common_Name: plants
Taxonomic_Classification:
Taxon_Rank_Name: Subkingdom
Taxon_Rank_Value: Viridiplantae
Applicable_Common_Name: green plants
Taxonomic_Classification:
Taxon_Rank_Name: Infrakingdom
Taxon_Rank_Value: Streptophyta
Applicable_Common_Name: land plants
Taxonomic_Classification:
Taxon_Rank_Name: Superdivision
Taxon_Rank_Value: Embryophyta
Taxonomic_Classification:
Taxon_Rank_Name: Division
Taxon_Rank_Value: Tracheophyta
Applicable_Common_Name: vascular plants
Applicable_Common_Name: tracheophytes
Taxonomic_Classification:
Taxon_Rank_Name: Subdivision
Taxon_Rank_Value: Spermatophytina
Applicable_Common_Name: spermatophytes
Applicable_Common_Name: seed plants
Applicable_Common_Name: phanérogames
Taxonomic_Classification:
Taxon_Rank_Name: Class
Taxon_Rank_Value: Pinopsida
Applicable_Common_Name: conifers
Taxonomic_Classification:
Taxon_Rank_Name: Subclass
Taxon_Rank_Value: Pinidae
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Pinales
Applicable_Common_Name: pines
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Pinaceae
Applicable_Common_Name: pines
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Abies
Applicable_Common_Name: fir
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Abies concolor
Applicable_Common_Name: balsam fir
Applicable_Common_Name: silver fir
Applicable_Common_Name: Colorado fir
Applicable_Common_Name: concolor fir
Applicable_Common_Name: white balsam
Applicable_Common_Name: oyamel de California
Applicable_Common_Name: white fir
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Pinus
Applicable_Common_Name: pine
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Pinus jeffreyi
Applicable_Common_Name: Jeffrey's pine
Applicable_Common_Name: black pine
Applicable_Common_Name: pino negro
Applicable_Common_Name: Jeffrey pine
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Pinus ponderosa
Applicable_Common_Name: ponderosa pine
Applicable_Common_Name: bull pine
Applicable_Common_Name: western yellow pine
Applicable_Common_Name: blackjack pine
Applicable_Common_Name: pinabete
Applicable_Common_Name: rock pine
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Cupressaceae
Applicable_Common_Name: cypress
Applicable_Common_Name: redwood
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Juniperus
Applicable_Common_Name: juniper
Applicable_Common_Name: cedar
Applicable_Common_Name: cedro
Applicable_Common_Name: redcedar
Applicable_Common_Name: sabino
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Calocedrus
Applicable_Common_Name: incense cedar
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Calocedrus decurrens
Applicable_Common_Name: incense cedar
Access_Constraints: None
Use_Constraints:
These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Ritchie, Martin W. 2023. Blacks Mountain Experimental Forest natural regeneration data (Lassen National Forest, California). Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2023-0049
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Pacific Southwest Research Station
Contact_Person: Martin W. Ritchie
Contact_Position: Research Forester
Contact_Address:
Address_Type: mailing and physical
Address: Redding Laboratory
Address: 3644 Avtech Parkway
City: Redding
State_or_Province: CA
Postal_Code: 96002
Country: USA
Contact_Voice_Telephone: 530-226-2551
Contact_Electronic_Mail_Address: martin.ritchie@usda.gov
Contact Instructions: This contact information was current as of original publication date. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Browse_Graphic:
Browse_Graphic_File_Name: \Supplements\Compartment_Map_BMEF_Large.jpg
Browse_Graphic_File_Description:
Scanned image of a Blacks Mountain Experimental Forest compartment map (showing all compartments), without annotations for 2018 sampling. (Larger size and higher resolution than Compartment_Map_BMEF_Mod.jpg.)
Browse_Graphic_File_Type: JPG
Browse_Graphic:
Browse_Graphic_File_Name: \Supplements\Compartment_Map_BMEF_Mod.jpg
Browse_Graphic_File_Description:
Scanned image of a Blacks Mountain Experimental Forest compartment map (which does not display a few of the eastern compartments), with annotations for locations of 2018 samples.
Browse_Graphic_File_Type: JPG
Data_Set_Credit:
The funding for this project was provided by the USDA Forest Service, Pacific Southwest Research Station.


Author Information:

Martin W. Ritchie
USDA Forest Service, Pacific Southwest Research Station
https://orcid.org/0000-0003-1633-0840
Cross_Reference:
Citation_Information:
Originator: Nepal, Sushil
Originator: Eskelsen, Bianca N.I.
Originator: Ritchie, Martin W.
Publication_Date: 2020
Title:
Difference in regeneration conditions in Pinus ponderosa dominated forests in northern California, USA, over an 83-year period
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Forests
Issue_Identification: 11(5): 581
Other_Citation_Details:
(Also included in data publication download: \Supplements\Documents\F5862.pdf)
Online_Linkage: https://doi.org/10.3390/f11050581
Online_Linkage: https://www.fs.usda.gov/research/treesearch/60435
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
We conducted quality checks of the BMEF 2018 regeneration data. Some checks for completeness and other process errors were done by Sushil Nepal at the University of British Columbia. However, the Forest Service also wanted to closely inspect the data, so additional testing was done, see the Logical Consistency section of \Supplements\Methods_for_2018_BMEF_Regeneration_Cruise.pdf for complete details.
Logical_Consistency_Report:
The data are logically consistent. The consistency was verified as part of the quality assurance that occurred during data analysis. See the Logical Consistency section of \Supplements\Methods_for_2018_BMEF_Regeneration_Cruise.pdf for complete details.
Completeness_Report:
The early plot data from 1933-1934 were discarded at some point after the summaries were completed in 1936, so the summary data are all that is available for these early data.

There are no missing data or omissions for the 2018 data.
Lineage:
Methodology:
Methodology_Type: Field
Methodolgy_Identifier:
Methodolgy_Keyword_Thesaurus:
None
Methodology_Keyword: forest natural regeneration
Methodology_Keyword: stocking
Methodology_Description:
An original tree census and regeneration inventory were conducted in 1933 and 1934 on 100 compartments of approximately 100 acres each. Trees ≥3.6 inches diameter at breast height (dbh) were censused across the entire property. For the regeneration portion of this effort, the regeneration (trees <3.6 inches) were sampled on 1-milacre plots in clusters. The clusters were in groups of 4 (in a square) along the transect and in pairs at either end. The regeneration were sampled in 4 different size classes. These are: 1) trees less than 1 foot tall, 2) trees between 1 and 3 feet tall, 3) trees between 3 feet and 6 feet tall, and 4) trees >6 feet tall and <3.6 inches breast height diameter.

These data were collected on 100 compartments averaging 100 acres in size. Subsequently in 1938, a Methods of Cutting study was initiated, with various treatments being applied from 1938 to 1948 (Hasel 1938, Hallin 1959).

For 2018 data we sampled 12 of the original compartments including 4 that are now designated as research natural areas (RNA). The regeneration was surveyed from July through October 2018, using methods similar to the 1933 inventory. (Data were collected such that either tree density or stocking can be evaluated directly Ritchie 2020). Seedlings were counted in 4-milacre circular plots (divided into 4 1-milacre quarters) by species or species group, and classified in five size classes. Size classes used in 2018 sampling were modified because of the abundance of current year seedlings observed in the spring of 2018. A zero class was added for trees <4 inches in height, and then class = 1 was modifed to represent trees that were 4 inches to 1 foot in height.

A complete description of the methods can be found in \Supplements\Methods_for_2018_BMEF_Regeneration_Cruise.pdf, in addition to a list of additional important references which are also included as supplemental files in this data publication.
Methodology_Citation:
Citation_Information:
Originator: Hasel, Austin A.
Publication_Date: 1938
Title:
Plan for methods-of-cutting study Blacks Mountain sustained yield project
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Redding, CA
Publisher: U.S. Department of Agriculture, Forest Service, California Forest and Range Experiment Station
Other_Citation_Details:
(Also included in data publication download: \Supplements\Documents\F4403.pdf)
Methodology_Citation:
Citation_Information:
Originator: Hallin, William E.
Publication_Date: 1959
Title:
The application of unit area control in the management of ponderosa-Jeffrey pine at Blacks Mountain Experimental Forest
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Technical Bulletin
Issue_Identification: 1191
Publication_Information:
Publication_Place: Washington, DC
Publisher: U.S. Department of Agriculture, Forest Service
Other_Citation_Details:
96 p.
Other_Citation_Details:
(Also included in data publication download: \Supplements\Documents\F1189.pdf)
Methodology_Citation:
Citation_Information:
Originator: Ritchie, Martin W.
Publication_Date: 2020
Title:
Relating stocking and density for natural regeneration of conifers in northern California
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Forest Science
Issue_Identification: 66(5): 521–525
Other_Citation_Details:
(Also included in data publication download: \Supplements\Documents\F5836.pdf)
Online_Linkage: https://doi.org/10.1093/forsci/fxaa005
Online_Linkage: https://www.fs.usda.gov/research/treesearch/60800
Process_Step:
Process_Description:
Data for 2018 were recorded on field sheets. In the office, the field sheets were scanned as Portable Document Format (PDF) files for a digital record. Data were then digitally entered into comma-separated values (CSV) files. Subsequently, S. Nepal conducted logic checks and made modifications to the CSV files as necessary to correct errors.
Process_Date: 2018
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Below you will find a list and description of the files included in this data publication.

VARIABLE DESCRIPTION FILE (1)
File is provided as a comma-separated values (CSV) file.

1. \Data\_variable_descriptions.csv: List and description of variables found in all data files. (A description of these variables is also provided in the metadata below.)

Columns include:

Filename = Name of data file
Variable = Name of variable
Units = Units (if applicable)
Precision = Precision (if applicable)
Description = Description of variable


DATA FILES (2)
Data files are provided as comma-separated values (CSV) files.

1. \Data\bmef1933regencompsummary.csv: Data summaries from the original 1933-1934 regeneration inventory.

Variables include:

compartment = This is a text string (which can be coerced to a factor) describing the original BMEF compartment designation.

year = Year of observation.

month = Month of observation.

area = Area of the compartment recorded in 1933-1934. Derived from a planimeter, is representative of the forested area typed out within the compartment. (acres, precision = 0.1)

n_plots = Number of 1-milacre plots (quadrats).

species = Species designation for the count: PP = Pinus ponderosa (ponderosa pine) and Pinus jeffreyi (Jeffrey pine), WF = Abies concolor (white fir), and IC = Calocedrus decurrens (incense-cedar). (Note: Ponderosa and Jeffrey pine were lumped together into a single species group (PP)). It appears that the researchers were not interested in any of the other minor species at BMEF, as they are not referenced in the count data.

htcl = Numeric height class designation for the count: 1 = < 1 foot, 2 = 1-3 feet, 3 = 3-6 feet, and 4 = 6 feet height to 3.5 inches diameter at breast height (dbh).

count = Count of trees on 1-milacre plot for the specified htcl and species.

tpa_hand = Trees per acre calculated by hand circa 1936 by Mors, rounded to 0.1.

tpa_calc = Trees per acre calculated with Microsoft Excel, rounded to 0.1.

error = Error (difference) between the two trees per acre values (units are trees per acre).


2. \Data\bmef2018regen.csv: Plot data from the 2018 regeneration inventory.

Variables include:

obs = Unique observation number.

compartment = This is a text string (which can be coerced to a factor) describing either the letter of the Research Natural Area, or the original BMEF compartment designation. See BMEF compartment map in \Supplements\Compartment_Map_BMEF_Mod.jpg.

year = Year of observation.

month = Month of the observation (numeric 1-12).

day = Day of the observation (numeric 1-31).

grid_X = BMEF easting index, from 0 to 100 meters. Function for nominal NAD 83 UTM (zone 10) Easting is: UTM_E = grid_X x 100 + 652000 (meters, precision = 0.5).

grid_Y = BMEF northing index, from 0 to 100 meters. Function for nominal NAD 83 UTM (zone 10) Northing is: UTM_N = grid_Y x 100 + 450600 (meters, precision = 0.5).

area = Area of the compartment recorded in 1935. (acres, precision = 0.1)

qds = Pie-wedge shaped 1-milacre plot number; 1 = NE, 2 = SE, 3 = SW, 4 = NW, four per grid point location. In the 1935 data these were square 1-milacre quadrats, either in a group of four or group of two with a common corner. Researchers employed circular 4-milacre plots with 1 milacre quarters in 2018.

species = Species designation for the count: PP = Pinus ponderosa (ponderosa pine) and Pinus jeffreyi (Jeffrey pine), WF = Abies concolor (white fir), and IC = Calocedrus decurrens (incense-cedar). No data were entered for other species, even though a few Juniperus occidentalis (western juniper) were encountered - these are entered in comments. (Note: the two pine species were collapsed into one species group to be consistent with the 1935 data collection effort.)

htcl = Numeric height class designation for the count: 0 = less than 4 inches, 1 = 4 inches to 1 foot, 2 = 1-3 feet, 3 = 3-6 feet, and 4 = 6 feet in height to 3.5 inches diameter at breast height (dbh). The 0-class was added because of the abundance of current year seedlings observed in the spring of 2018 before sampling began. Thus, many of the seedlings less than 4 inches in height are going to be ephemeral. By creating the 0-class, these may be removed easily from consideration. Note: in the data from 1933 and 1934, there is no zero class, rather class 1 appears to include all seedlings <1 foot tall.

count = Count of trees on 1-milacre plot for the specified htcl and species.

groups = Similar to count by a cache of seedlings is counted as 1. It is not uncommon to encounter seedlings that have been cached by rodents. These will present as a group of seedlings germinating from the same spot. A value of zero groups indicates there were no cached seedlings observed in the plot.

comments = Text string containing comments.



SUPPLEMENTAL FILES (47)
Supplemental files are provided as either a Joint Photographic Experts Group (JPEG) file or Portable Document Format (PDF) file.

1. \Supplements\Compartment_Map_BMEF_Large.jpg: Scanned image of a Blacks Mountain Experimental Forest compartment map (showing all compartments), without annotations for 2018 sampling. (Larger size and higher resolution than Compartment_Map_BMEF_Mod.jpg.)

2. \Supplements\Compartment_Map_BMEF_Mod.jpg: Scanned image of a Blacks Mountain Experimental Forest compartment map (which does not display a few of the eastern compartments), with annotations for locations of 2018 samples.

3. \Supplements\Methods_for_2018_BMEF_Regeneration_Cruise.pdf: Methodology description for the 1933 and 2018 field procedures.


Scanned Images

4. \Supplements\DataScans\1933\regen_1933_1934_summaries.pdf: Scanned images of data summaries from the 1933 regeneration inventory.

5. \Supplements\DataScans\2018\Comp B24-4 Group 1 of 2 North RNA A.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B24-4, group 1 of 2.

6. \Supplements\DataScans\2018\Comp B24-4 Group 2 of 2 South RNA A.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B24-4, group 2 of 2.

7. \Supplements\DataScans\2018\Comp B24-7 Group 1 of 3 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B24-7, group 1 of 3.

8. \Supplements\DataScans\2018\Comp B24-7 Group 2 of 3 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B24-7, group 2 of 3.

9. \Supplements\DataScans\2018\Comp B24-7 Group 3 of 3 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B24-7, group 3 of 3.

10. \Supplements\DataScans\2018\Comp B27-11 Group 1 of 4 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B27-11, group 1 of 4.

11. \Supplements\DataScans\2018\Comp B27-11 Group 2 of 4 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B27-11, group 2 of 4.

12. \Supplements\DataScans\2018\Comp B27-11 Group 3 of 4 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B27-11, group 3 of 4.

13. \Supplements\DataScans\2018\Comp B27-11 Group 4 of 4 Unit 43.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment B27-11, group 4 of 4.

14. \Supplements\DataScans\2018\Comp C4-21 Group 1 of 1 Entire RNA D.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment C4-21.

15. \Supplements\DataScans\2018\Comp G2-8 Group 1 of 2 North Bull B2.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G2-8, group 1 of 2.

16. \Supplements\DataScans\2018\Comp G2-8 Group 2 of 2 South Bull B2.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G2-8, group 2 of 2.

17. \Supplements\DataScans\2018\Comp G2-12 Group 1 of 3 North RNA C.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G2-12, group 1 of 3.

18. \Supplements\DataScans\2018\Comp G2-12 Group 2 of 3 Middle RNA C.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G2-12, group 2 of 3.

19. \Supplements\DataScans\2018\Comp G2-12 Group 3 of 3 South RNA C.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G2-12, group 3 of 3.

20. \Supplements\DataScans\2018\Comp G7-6 Group 1 of 2 North Bull B1.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G7-6, group 1 of 2.

21. \Supplements\DataScans\2018\Comp G7-6 Group 2 of 2 South Bull B1.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G7-6, group 2 of 2.

22. \Supplements\DataScans\2018\Comp G10-1 Group 1 of 2 North Bull A4.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G10-1, group 1 of 2.

23. \Supplements\DataScans\2018\Comp G10-1 Group 2 of 2 South Bull A4.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G10-1, group 2 of 2.

24. \Supplements\DataScans\2018\Comp G14-3 Group 1 of 4 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G14-3, group 1 of 4.

25. \Supplements\DataScans\2018\Comp G14-3 Group 2 of 4 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G14-3, group 2 of 4.

26. \Supplements\DataScans\2018\Comp G14-3 Group 3 of 4 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G14-3, group 3 of 4.

27. \Supplements\DataScans\2018\Comp G14-3 Group 4 of 4 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G14-3, group 4 of 4.

28. \Supplements\DataScans\2018\Comp G17-1 Group 1 of 2 North Bull A3.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G17-1, group 1 of 2.

29. \Supplements\DataScans\2018\Comp G17-1 Group 2 of 2 South Bull A3.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G17-1, group 2 of 2.

30. \Supplements\DataScans\2018\Comp G17-6 Group 1 of 3 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G17-6, group 1 of 3.

31. \Supplements\DataScans\2018\Comp G17-6 Group 2 of 3 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G17-6, group 2 of 3.

32. \Supplements\DataScans\2018\Comp G17-6 Group 3 of 3 Unit 39.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment G17-6, group 3 of 3.

33. \Supplements\DataScans\2018\Comp P21-28 Group 1 of 2 North RNA B.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment P21-28, group 1 of 2.

34. \Supplements\DataScans\2018\Comp P21-28 Group 2 of 2 South RNA B.pdf: Scanned images of data field sheets from the 2018 regeneration inventory in compartment P21-28, group 2 of 2.


Documents

35. \Supplements\Documents\F1189.pdf: USDA Forest Service Technical Bulletin 1191 titled "The application of unit area control in the management of ponderosa-Jeffrey pine at Blacks Mountain Experimental Forest" by William E. Hallin (1959).

Hallin, William E. 1959. The application of unit area control in the management of ponderosa-Jeffrey pine at Blacks Mountain Experimental Forest. Technical Bulletin. No. 1191. Washington, DC: U.S. Department of Agriculture. 96 p.


36. \Supplements\Documents\F1801.pdf: Report titled "The sustained yield project" from the Blacks Mountain Experimental Forest (USDA Forest Service 1938).

USDA Forest Service. 1938. Sustained yield project Blacks Mountain Experimental Forest Lassen National Forest. Blacks Mountain Branch, California Forest and Range Experiment Station. Report on file. Redding, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station.


37. \Supplements\Documents\F4074.pdf: PDF file of the USDA Forest Service Forest Research Notes document titled "A sustained yield experiment in ponderosa pine in northeastern California" by Duncan Dunning and Austin A. Hasel (1938, reissued in 1945).

Dunning, D.; Hasel, A.A. 1938. The Blacks Mountain Experimental Forest - A sustained yield experiment in ponderosa pine in northeastern California. Forest Research Note. Berkeley, CA: U.S. Department of Agriculture, Forest Service, California Forest and Range Experiment Station.


38. \Supplements\Documents\F4403.pdf: Unpublished study plan manuscript titled "Plan for methods-of-cutting study Blacks Mountain sustained yield project" by Austin A. Hasel (1938).

Hasel, A.A. 1938. Plan for methods-of-cutting study Blacks Mountain sustained yield project. Unpublished manuscript on file. Redding, CA: U.S. Department of Agriculture, Forest Service, California Forest and Range Experiment Station.

39. \Supplements\Documents\F5060.pdf: USDA Forest Service General Technical Report PSW-GTR-198 titled "Reintroducing fire into the Blacks Mountain Research Natural Area: effects on fire hazard" by Carl N. Skinner (2005).

Skinner, Carl N. 2005. Reintroducing fire into the Blacks Mountain Research Natural Area: effects on fire hazard. In: Ritchie, Martin W.; Maguire, Douglas A.; Youngblood, Andrew, tech. coordinators. Proceedings of the Symposium on Ponderosa Pine: Issues, Trends, and Management, 2004 October 18-21, Klamath Falls, OR: Gen. Tech. Rep PSW-GTR-198. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. Pages 245-257. https://www.fs.usda.gov/research/treesearch/27272


40. \Supplements\Documents\F5440.pdf: USDA Forest Service General Technical Report PSW-GTR-179 titled "Ecological research at the Blacks Mountain Experimental Forest in northeastern California" by William W. Oliver (2000).

Oliver, William W. 2000. Ecological research at the Blacks Mountain Experimental Forest in northeastern California. Tech. Rep. PSW-GTR-179. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 66 p. https://doi.org/10.2737/PSW-GTR-179


41. \Supplements\Documents\F5744.pdf: Manuscript titled "Natural regeneration" by Douglass F. Roy (1983).

Roy, D.F. 1983. Natural regeneration. In: Robson, T.F.; Standiford, R.B. Management of the eastside pine type in northeastern California. 1982, June 15-17; Susanville, CA. Society of American Foresters SAF 83-106. Pages 87-102.


42. \Supplements\Documents\F5836.pdf: Journal article titled "Relating stocking and density for natural regeneration of conifers in northern California" by Martin W. Ritchie (2020).

Ritchie, Martin W. 2020. Relating stocking and density for natural regeneration of conifers in northern California. Forest Science. 66(5): 521–525. https://doi.org/10.1093/forsci/fxaa005 and https://www.fs.usda.gov/research/treesearch/60800


43. \Supplements\Documents\F5839.pdf: Journal article titled "Long-term response of old-growth stands to varying levels of partial cutting in the eastside pine type" by Dolph et al. (1995).

Dolph, K. Leroy; Mori, Sylvia R.; Oliver, William W. 1995. Long-term response of old-growth stands to varying levels of partial cutting in the eastside pine type. Western Journal of Applied Forestry. 10(3): 101-108. https://doi.org/10.1093/wjaf/10.3.101


44. \Supplements\Documents\F5860.pdf: Establishment report for the Blacks Mountain Research Natural Area, written in 1975.

Roy, D.F. 1975. Establishment report Blacks Mountain Research Natural Area, within the Blacks Mountain Experimental Forest, Lassen National Forest, Lassen County, California. Unpublished report on file. Redding, CA: U.S. Department of Agriculture, Forest Service, Pacific Forest and Range Experiment Station.


45. \Supplements\Documents\F5861.pdf: USDA Forest Service General Technical Report titled "Forest Service research natural areas in California" edited by Sheauchi Cheng (2004).

Cheng, Sheauchi, tech. ed. 2004. Forest Service research natural areas in California. Gen. Tech. Rep. PSW-GTR-188. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; 338 p. https://doi.org/10.2737/PSW-GTR-188


46. \Supplements\Documents\F5862.pdf: Journal article titled "Difference in regeneration conditions in Pinus ponderosa dominated forests in northern California, USA, over an 83 year period" by Nepal et al. (2020).

Nepal, Sushil; Eskelson, Bianca N.I.; Ritchie, Martin W. 2020. Difference in regeneration conditions in Pinus ponderosa dominated forests in northern California, USA, over an 83 year period. Forests. 11(5): 581. https://doi.org/10.3390/f11050581 and https://www.fs.usda.gov/research/treesearch/60435


47. \Supplements\Documents\F5863.pdf: Manuscript titled "Black's Mountain Experimental Forest 1993 grid establishment Pacific Southwest Research Station Lassen County".

Del Terra Inc. 1994. Blacks Mountain Experimental Forest 1993 grid establishment Pacific Southwest Research Station Lassen County. Unpublished report on File, U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, Redding Laboratory. Redding, CA.
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