This readme.txt file was generated on 20200214 by Melissa Wilson ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Managing nitrogen from manure with a winter rye cover crop: Research dataset 2. Author Information Principal Investigator Contact Information Name: Leslie A. Everett Institution: Water Resources Center - University of Minnesota Address: 173 McNeal Hall, 1985 Buford Ave., St. Paul, MN 55108 Email: evere003@umn.edu ORCID: Associate or Co-investigator Contact Information Name: Melissa L. Wilson Institution: Dept. Soil, Water, and Climate - University of Minnesota Address: 439 Borlaug Hall, 1991 Upper Buford Circle, Saint Paul, MN 55108 Email: mlw@umn.edu ORCID: https://orcid.org/0000-0002-2803-5083 Associate or Co-investigator Contact Information Name: Randall J. Pepin Institution: University of Minnesota Extension Address: 240 Coffey Hall, 1420 Eckles Ave., St. Paul, MN 55108-6068 Email: pepin019@umn.edu ORCID: Associate or Co-investigator Contact Information Name: Jeffrey A. Coulter Institution: Dept. of Agronomy - University of Minnesota Address: 411 Borlaug Hall, 1991 Upper Buford Circle, Saint Paul, MN 55108 Email: jeffcoulter@umn.edu ORCID: https://orcid.org/0000-0003-4609-4551 3. Date of data collection (single date, range, approximate date) 2015 to 2017 4. Geographic location of data collection (where was data collected?): Minnesota 5. Information about funding sources that supported the collection of the data: This research was funded by a Section 319 grant from the U.S. Environmental Protection Agency through the Minnesota Pollution Control Agency, grant number 103675/PO3000015229, and by funds from the Minnesota Agricultural Experiment Station, University of Minnesota. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: Attribution-NonCommercial-NoDerivs 3.0 United States license (CC BY-NC-ND 3.0 US) 2. Links to publications that cite or use the data: Everett, L.A., Wilson, M.L., Pepin, R.J., & Coulter, J.A. (2019). Winter Rye Cover Crop with Liquid Manure Injection Reduces Spring Soil Nitrate but Not Maize Yield. Agronomy, 9(12), 852. doi: 10.3390/agronomy9120852 3. Links to other publicly accessible locations of the data: https://blog-crop-news.extension.umn.edu/2018/07/managing-manure-nitrogen-with-cover-crop.html https://z.umn.edu/3k2o 4. Links/relationships to ancillary data sets: None. 5. Was data derived from another source? No. 6. Recommended citation for the data: Everett, L.A., Wilson, M.L., Pepin, R.J., & Coulter, J.A. (2019). Managing nitrogen from manure with a winter rye cover crop: Research dataset. Data Repository for University of Minnesota. https://doi.org/10.13020/8xx8-qs36 --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: CCmanureDRUMdata.xlsx Short description: The primary data collected for the research project. 2. Relationship between files: Not applicable. 3. Additional related data collected that was not included in the current data package: Farmer identifying information, including names and location of farms where research was conducted, were collected that are not included in this dataset. Raw data from the commercial laboratory analyses are not included here, either. 4. Are there multiple versions of the dataset? No. -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Please see: Everett, L.A., Wilson, M.L., Pepin, R.J., & Coulter, J.A. (2019). Winter Rye Cover Crop with Liquid Manure Injection Reduces Spring Soil Nitrate but Not Maize Yield. Agronomy, 9(12), 852. doi: 10.3390/agronomy9120852 2. Methods for processing the data: Dates for various data collected were transformed to Julian date instead of the typical day-month-year format. Soil sample nitrate values were converted from concentrations to loads by multiplying the concentration (ppm) by 8 since the soil depth was 24 inches. Grain yield was adjusted to 15% moisture and silage was adjusted to 65% moisture to maintain consistency in reporting. Nitrogen uptake in plants was calculated by using the percent N of the plant matter as found by combustion analysis and multiplying that by dry matter biomass amount. Plant N uptake was calculated by adding up N uptake in grain and stover if the corn was harvested for grain) or just in stover if corn was harvested for silage. 3. Instrument- or software-specific information needed to interpret the data: Microsoft Excel is needed. 4. Standards and calibration information, if appropriate: Not applicable. 5. Environmental/experimental conditions: On-farm research trials in agricultural crop production. Data collected spring through fall seasons. 6. Describe any quality-assurance procedures performed on the data: All samples were sent to commercial laboratories for analysis and QA/QC procedures were performed at the laboratories. 7. People involved with sample collection, processing, analysis and/or submission: On-farm trials were carried out with the assistance of University of Minnesota Extension Educators, Karen Anderson, Daniel Martens, Emily Wilmes, Sarah Sheick, Brenda Miller, Melissa Runck, Lizabeth Stahl, Diane DeWitt, Brad Carlson, Gregory Klinger, Jason Ertl, and Rodney Greder, as well as West Central Research and Outreach Center faculty and staff Bradley Heins and Curt Reese. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: CCmanureDRUMdata.xlsx ----------------------------------------- 1. Number of variables: 22 variables (columns) 2. Number of cases/rows: 112 rows 3. Missing data codes: Code/symbol . Definition Data was missing (not collected or sample was lost). Code/symbol Definition Data was not collected because it was not applicable to that treatment. For example, we could not collect data on aboveground rye biomass on treatments where rye was not planted. 4. Variable List A. Name: Year Description: The year the trial was conducted. 1 = Fall 2015 - Fall 2016 2 = Fall 2016 - Fall 2017 B. Name: Site# Description: Each site or location of the trial was numbered 1 to 19. Identifying information of the location of each site cannot be shared. C. Name: Rep Description: Each replicate of the trial on each farm was numbered 1 to 3. 1 = Replicate 1 2 = Replicate 2 3 = Replicate 3 D. Name: Treatment Description: Each treatment was numbered 1 to 2. 1 = Cover crop 2 = No cover crop E. Name: Region Description: The region of the state where the trial was located. S = Southern part of Minnesota C = Central part of the Minnesota F. Name: Prior crop Description: The cash crop that the cover crops were planted after during the fall. 1 = Silage corn 2 = Soybean G. Name: Following crop Description: The cash crop that followed the cover crop. 1 = Silage corn 2 = Grain corn H. Name: Rye plant date Description: The day of year (1-365) that the rye was planted at the location. I. Name: Manure inj date Description: The day of year (1-365) that the manure was injected at each location. J. Name: Total avail app N Description: The total amount of plant available (first year) nitrogen applied with the manure and/or commercial fertilizers. K. Name: Spring CC Biomass Collection Date Description: The day of year (1-365) that the cover crop (CC) above-ground biomass was collected at each location. L. Name: Spring CC Biomass DM Description: The amount of above-ground cover crop (CC) biomass that was collected in the spring at each location within each plot. Biomass was dried and the units are in pounds per acre of dry matter (DM). M. Name: CC Termination Ht Description: How tall the cover crop (CC) was at termination, in inches. The height of only one sample was recorded and assumed to be the same for each replication. N. Name: Spring CC N DM Description: The amount of nitrogen (N) in the above-ground cover crop (CC) biomass that was collected in the spring. Biomass was dried before analysis so the units are based on the dry matter (DM) content and are reported in pounds of N per acre. O. Name: Soil NO3-N Description: The amount of soil nitrate (NO3-N) available in the top 24 inches of soil in each plot as reported in pounds of nitrate per acre. Samples were collected in spring near the time of cover crop (CC) termination. P. Name: Grain Yield 15% Description: The yield of corn harvested for grain in bushels per acre. Yields were dried and then weighed, then adjusted to 15% moisture for consistency. Not all sites harvested their corn as grain, and missing data - as denoted by a blank space - was a result of this. Q. Name: Grain N Description: The amount of nitrogen (N) in the grain of the corn crop that followed cover crops (CC). The N in the grain without CC was also included. Grain N was reported in pounds of N per acre. R. Name: Stalk DM Biomass Description: The stalk dry matter (DM) biomass yield of corn harvested for grain in pounds per acre. Not all sites harvested their corn as grain, and missing data - as denoted by a blank space - was a result of this. S. Name: Stalk N Description: The amount of nitrogen (N) in the stalk of the corn crop that followed cover crops (CC). The N in the stalks without CC was also included. Stalk N was reported in pounds of N per acre. T. Name: Silage Yield 65% Description: The yield of corn harvested for silage in tons per acre. Yields were dried and then weighed, then adjusted to 65% moisture for consistency. Not all sites harvested their corn as silage and missing data - as denoted by a blank space - was a result of this. U. Name: Silage N Description: The amount of nitrogen (N) in the silage corn crop that followed cover crops (CC). Silage N was reported in pounds of N per acre. V. Name: Total Plant N uptake Description: The amount of nitrogen (N) in the total corn plant as reported in pounds per acre. If the corn was silage corn, this number will be equal to the Silage N column. If the corn was grain corn, then this number will be equal to the Grain N + Stalk N columns.