This BSR_README.txt was created by Uriel D. Menalled on 2022/04/08


GENERAL INFORMATION
1. Data from: Cereal rye mulch biomass and crop density affect weed suppression and community assembly in no-till planted soybean

2. Author information
a. Principal Investigator and corresponding author
Name: Uriel D. Menalled
Institution: Cornell University, Soil and Crop Sciences Section, School of Integrative Plant Science
Email: udm3@cornell.edu

b. Associate investigator
Name: Guillaume Adeux
Institution: INRAE, AgroŽcologie

c. Associate investigator
Name: StŽphane Cordeau
Institution: INRAE, AgroŽcologie

d. Associate investigator
Name: Richard G. Smith
Institution: University of New Hampshire, Department of Natural Resources and the Environment

e. Associate investigator
Name: Steven B. Mirsky
Institution: USDAÐARS Sustainable Agricultural Systems Laboratory

f. Associate investigator
Name: Matthew R. Ryan
Institution: Cornell University, Soil and Crop Sciences Section, School of Integrative Plant Science

3. Site location and experiment dates
a. Beltsville Agricultural Research Center; Beltsville, MD USA (39.0253061458567, -76.92355096523069)
i. Cover crop seeding: Fall 2007 and 2008
ii. Treatment establishment and soybean planting: June 2008 and 2009
iii. Data collection: Approximately 15 weeks after soybean planting

b. Rodale Institute; Kutztown, PA USA (40.55038903385014, -75.72195706055541)
i. Cover crop seeding: Fall 2007
ii. Treatment establishment and soybean planting: June 2008
iii. Data collection: Approximately 15 weeks after soybean planting

c. Russell E. Larson Agricultural Research Center; Rock Springs, PA USA (40.70951640689658, -77.95002402152815)
i. Cover crop seeding: Fall 2008
ii. Treatment establishment and soybean planting: June 2009
iii. Data collection: Approximately 15 weeks after soybean planting

4. Funding information: This data is based upon research supported by the Chateaubriand Fellowship of the Office for Science & Technology of the Embassy of France in the United States. This research was also supported by the USDA National Institute of Food and Agriculture, Organic Agriculture Research and Extension Initiative project 2020-51300-32183; the Cornell University Agricultural Experiment Station (Hatch funds) and Cornell Cooperative Extension (Smith Lever funds) project 1023863; and the New York State Environmental Protection Fund for the New York Soil Health Initiative, administered through the New York State Department of Agriculture and Markets Contract No. C00178GS-3000000.


SHARING/ACCESS INFORMATION
1. Licenses/restrictions placed on the data: CC0. This dataset is shared under a Creative Commons 1.0 Universal Public Domain Dedication (https://creativecommons.org/publicdomain/zero/1.0/). The material can be copied, modified and used without permission, but attribution to the original authors is always appreciated.

2. Links to publications that cite or use the data:
a. Menalled UD, Adeux G, Cordeau S, Smith RG, Mirsky SB, Ryan MR (2022) Cereal rye mulch biomass and crop density affect weed suppression and community assembly in no-till planted soybean. Ecosphere.
b. Ryan, Matthew R, Steven B Mirsky, David A Mortensen, John R Teasdale, and William S Curran. 2011. Potential Synergistic Effects of Cereal Rye Biomass and Soybean Planting Density on Weed Suppression. Weed Science 59 (2): 238Ð46. https://doi.org/10.1614/WS-D-10-00110.1.

3. Links to other publicly accessible locations of the data: N/A

4. Links/relationships to ancillary data sets: N/A

5. Was data derived from another source? No

6. Recommended citation for this dataset: Menalled UD, Adeux G, Cordeau S, Smith RG, Mirsky SB, Ryan MR. 2022. Data froms: Cereal rye mulch biomass and crop density affect weed suppression and community assembly in no-till planted soybean. [Dataset] Cornell University Library eCommons Repository.Êhttps://doi.org/10.7298/6s0s-gq43.



DATA & FILE OVERVIEW
1. File list
a. BSR_DataFinal.csv
b. BSR_TraitsFinal.csv

2. Relationship between files
a. BSR_DataFinal.csv (experiment data)
b. BSR_TraitsFinal.csv (Weed species trait values)

3. Additional related data collected that was not included in the current data package: N/A

4. Are there multiple versions of the dataset? No


METHODOLOGICAL INFORMATION
1. Methods used for collection/generation of data: Methods for collecting experiment data can be found in the related Ecosphere article (DOI will be linked).

2. Methods for processing/analyzing the data: All data processing and analysis took place in R. Methods can be found in the the related Ecosphere article (DOI will be linked).

3. Instrument- or software-specific information needed to interpret the data: R version 4.1.2 (2021-11-01) -- "Bird Hippie"

4. Standards and calibration information, if appropriate: N/A

5. Environmental/experimental conditions: Agricultural land in the American northeast and mid-Atlantic regions. 

6. Describe any quality-assurance procedures performed on the data: Data was assessed for outliers during analysis.

7. People involved with:
a. Sample collection and processing: Steven B. Mirsky and Matthew R. Ryan
Analysis and submission: Uriel D. Menalled, Guillaume Adeux, Stephane Cordeau, Richard G. Smith, Steven B. Mirsky, and Matthew R. Ryan


DATA-SPECIFIC INFORMATION FOR: [BSR_DataFinal.csv]

This is the main experimental data. Each row is a unique plot each column is an experimental design or response variable. Blank cells in BSRDataFinal.csv indicate that no measurement was taken.

1. Number of variables: 72

2. Number of rows: 400, not including header.

3. Variable list:
a. Site: Location data. PSU and Rodale (PA), BARC (MD)
b. Year: Experiment year. 2008 and 2009
c. Bock: Experimental block according to field map
d. Plot: Experimental plot according to field map
e. Mulch rate: Cereal rye biomass treatment; fold difference from ambient treatment.
f. SoybeanRate_SeedsHa: Soybean seeding rate. Seeds per hectare
g. RyeCCBiomass_g.m2: Sampled cereal rye dry biomass. grams per meter squared
h. SoybeanDensity_WeedSampling_plants.m2: Soybean density at sampling. Plants per meter squared.
i. SoybeanYield_g.m2: Soybean seed weight at 13% moisture. Grams per meter squared. This data was computed from soybeans dried to 0% moisture. 
j. Grass4: Composite biomass of Digitaria sanguinalis (L.) Scop., Echinochola crus-galli (L.) Beauv., Setaria viridis (L.) Beauv., and Setaria faberi Herrm. in Grams per meter squared
k. All other variables (columns 11-72): Weed species biomass in grams per meter squared. Species are listed by their scientific name.

4. Notes:
a. BARC 2008 plot 221: "Unknown grass" was missing, and it imputed as the average of unknown grass biomass in the same site-year, seeding rate, and much treatment (i.e. avg across the 4 blocks).


DATA-SPECIFIC INFORMATION FOR: [BSR_TraitsFinal.csv]

This is the trait data. Each row is a unique species, and each column is a trait value. The symbols by each trait value show the source of each measurement, which is listed below the table. This data is also presented in Appendix S1: Table S1 of the Ecosphere publication. The "-" symbol in BSR_TraitsFinal.csv indicates that it was not possible to get a trait attribute value.

1. Number of variables: 12

2. Number of rows: 60, not including header or key.

3. Variable list:
a. SpeciesName: A scientific name of each sampled species in the experiment
b. Life span: Plant life span. a = annual, b = biennial; p = perennial
c. Life span source: Reference for life span value. Symbol defined in the key below the table.
d. Height at maturity (cm): Weed height measured in centimeters
e. Height at maturity source: Reference for height at maturity value. Symbol defined in the key below the table.
f. Seed dry weight (mg): Dry weed seed weight measured in milligrams
g. Seed dry weight source: Reference for Seed dry weight value. Symbol defined in the key below the table.
h. SLA (mm2/mg): Weed Specific Leaf Area (SLA) measured in millimeters squared per milligram
i. SLA source: Reference for SLA value. Symbol defined in the key below the table.
j. Emergence: Weed emergence period. ErlySp = Early Spring, Sp = Spring, Su = Summer. Weeds classified as early spring were those that commonly emerged before mid-May; spring meant emergence between mid-May to mid-June; summer emerging weeds were warm-season annuals that emerged after mid-June.
k. Emergence source: Reference for emergence value. Symbol defined in the key below the table.
l. Notes: Anytime a model species had to be used to get trait data, it was listed in this column.

4. Notes: Any discrepancy is listed in the "Notes" column. There was no missing data.