This Data from Cultivar mixtures: A meta-analysis of the effect of intraspecific diversity on crop yield readme.txt file was generated on [20170908] by [Emily Reiss] ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset: Data from Cultivar mixtures: A meta-analysis of the effect of intraspecific diversity on crop yield 2. Author Information Principal Investigator Contact Information Name: Emily R. Reiss Institution: Cornell University Address: 134A Plant Science, Ithaca, NY 14853 Email: err76@cornell.edu Associate or Co-investigator Contact Information Name: Laurie E. Drinkwater Institution: Cornell University Address: 134A Plant Science, Ithaca, NY 14853 Email: led24@cornell.edu 3. Date of data collection (single date, range, approximate date) Final modifications to dataset completed May, 28 2016. 4. Geographic location of data collection (where was data collected?): Ithaca, NY 5. Information about funding sources that supported the collection of the data: USDA-NIFA Organic Transitions Program (Project number NYC-145521) -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: CC-BY 2. Recommended citation for the data: Reiss, Emily (2017). Data from Cultivar mixtures: A meta-analysis of the effect of intraspecific diversity on crop yield (dataset). eCommons Digital Repository, Cornell University Library. Ithaca, NY. doi: 10.7298/X4TX3CHF --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: ReissDrinkwater_EcolAppl_CultivarMixtureDatabase_2017_1.csv Short description: Database constructed for meta-analysis 2. Are there multiple versions of the dataset? no -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Variable values were collected from studies matching meta-analysis criteria as detailed in Reiss and Drinkwater 2017. 2. Methods for processing the data: See Reiss and Drinkwater 2017 3. People involved with sample collection, processing, analysis and/or submission: Emily R. Reiss, and Laurie E. Drinkwater (analysis) ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: ReissAndDrinkwater_EcologicalAppliations_CultivarMixtureDatabase_2017_1.csv ----------------------------------------- 1. Number of variables: 53 2. Number of cases/rows: 5412 3. Variable List Name: Study ID Description: Corresponds to reference list exported from Zotero. Not consecutive numbering as studies were removed if the did not meet criteria. Name: Year of start of experiment Description: Year of the start of the experiment, or years if multiple years were pooled for reporting. Name: Site notation Description: Designation of the site if multiple sites in one study. Not always applicable. Name: Treatment notation Description: Designation of a treatment imposed in the study if multiple treatments in the study. Not always applicable. Name: Composition Description: Composition of obseravation, either mixture or monoculture. Name: Number of cultivars Description: Number of cultivars in mixture Name: Crop type Description: Crop type either legume or non-legume Name: Crop Description: Common name of crop species Name: Harvested product Description: Product harvested from experiment, grain, root, or dry matter (biomass). Name: Replications Description: Number of replications of experiment Name: Seed density (seeds/m2) Description: Planting density by seeds per meter squared Name: Seed density (kg/ha) Description: Panting density by kg of seeds per ha Name: Row spacing Description: Distance between rows (cm) Name: Mixture Ratio Description: Ratio of cultivars in mixture Name: Evenness Description: Are mixture proportions evenly split or uneven Name: Cultivar 1 Description: Identity of cultivar 1 by name or notation in study Name: Cultivar 2 Description: Identity of cultivar 2 by name or notation in study Name: Cultivar 3 Description: Identity of cultivar 3 by name or notation in study Name: Cultivar 4 Description: Identity of cultivar 4 by name or notation in study Name: Cultivar 5 Description: Identity of cultivar 5 by name or notation in study Name: Cultivar 6 Description: Identity of cultivar 6 by name or notation in study Name: Cultivar 7 Description: Identity of cultivar 7 by name or notation in study Name: Cultivar 8 Description: Identity of cultivar 8 by name or notation in study Name: Cultivar 9 Description: Identity of cultivar 9 by name or notation in study Name: Cultivar 10 Description: Identity of cultivar 10 by name or notation in study Name: Water stress code Description: Water stress ranked as low or medium/high by author description in paper Name: Disease stress code Description: Disease stress ranked as high, low or both (if no interaction) Name: Fertilizer application code Description: Fertilizer application as yes or no (for N,P, or K) Name: N Fert applied code Description: Nitrogen fertilizer application as yes or no Name: N application Description: Nitrogen fertilizer amount (kg/ha) and/or type if reported, or just yes Name: P application Description: Phosphorus fertilizer amount (kg/ha) and/or type if reported, or just yes Name: K application Description: Potassium fertilizer amount (kg/ha) and/or type if reported, or just yes Name: Primary experimental purpose Description: Primary purpose of experiment as indicated by authors in paper Name: Intentionality of mix Description: Specified if the authors specified traits on which they selected cultivars unspecified if not Name: Primary design criteria Description: Primary trait criteria on which authors selected cultivars (only if "Specified" for "Specified basis for mixture") Name: Monoculture yield Description: Monoculture yield (tons/ha) Name: Actual mixture yield Description: Actual mixture yield (tons/ha) Name: Expected mixture yield Description: Expected mixture yield calculated as the sum of (monoculture yield of cultivar X*proportion of cultivar X in mixture) Name: Relative yield Description: Calculated as actual mixture yield/expected mixture yield Name: Elevation Description: Elevation of experiment site in meters above sea level if reported Name: Latitude Description: Latitude of experiment site in degrees Name: Location Description: Common name location of experiment site Name: Continent Description: Continent of experiment site Name: Soil type Description: Soil type of experiment site if specified Name: Soil texture Description: Soil texture of experiment site if specified Name: Organic matter Description: Organic matter of soil at experiment site in percent if specified Name: pH Description: pH of soil at experiment site if specified Name: Soil N ppm Description: Concentration of nitrogen in soil at experiment site in parts per million (ppm) Name: Soil P ppm Description: Concentration of phosphorus in soil at experiment site in parts per million (ppm) Name: Soil K ppm Description: Concentration of potassium in soil at experiment site in parts per million (ppm) Name: Climate zone Description: Climate zone as defined by latitude Name: Decade of study Description: Decade of study Name: Number of observations Description: Number of observations 4. Missing data codes: Code/symbol=NR Definition: Not reported in study Code/symbol=NA or blank Definition: Data is not applicable to that observation