{"type": "FeatureCollection", "features": [{"id": "10.5061/dryad.547d7wmf3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:21Z", "type": "Dataset", "created": "2023-08-15", "title": "Data from: Long-term changes in soil carbon and nitrogen fractions in switchgrass, native grasses, and no-till corn bioenergy production systems", "description": "unspecified# Data from: Long-term changes in soil carbon and nitrogen fractions in  switchgrass, native grasses, and no-till corn bioenergy production systems  These files contain data from soil and root samples use in this  publication. The R script uses this data to perform the statistical  analysis used in the publication. ## Description of the data and file  structure The soil and root data contain measured variables within each  experimental unit across multiple years during the study period. The  variable in the R script called 'top_level_directory' can be  changed to the path of the download files' directory to run the  analysis. Note that NA = not available. ## Code/Software There is an R  script provided that conducts the statistical analysis used in this study.  The necessary packages are listed at the top of the script. The variable  in the script called 'top_level_directory' can be changed to the  path of the download files' directory to run the analysis.", "keywords": ["2. Zero hunger", "native grasses", "Biofuel feedstocks", "Biofuel Cropping System Experiment", "soil nitrogen", "Bioenergy feedstock", "FOS: Earth and related environmental sciences", "15. Life on land", "7. Clean energy", "Soil carbon", "Zea mays", "mineral-assoicated organic matter", "Panicum virgatum", "13. Climate action", "Particulate organic matter", "root productivity", "soil aggregate"], "contacts": [{"organization": "Perry, Sophie, Falvo, Grant, Mosier, Samantha, Robertson, G. Philip,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.547d7wmf3"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.547d7wmf3", "name": "item", "description": "10.5061/dryad.547d7wmf3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.547d7wmf3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-08-25T00:00:00Z"}}, {"id": "10.5061/dryad.f1b82", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:26Z", "type": "Dataset", "title": "Data from: Nitrogen fertilization challenges the climate benefit of cellulosic biofuels", "description": "unspecifiedCellulosic biofuels are intended to improve future energy and climate  security. Nitrogen (N) fertilizer is commonly recommended to stimulate  yields but can increase losses of the greenhouse gas nitrous oxide (N2O)  and other forms of reactive N, including nitrate. We measured soil N2O  emissions and nitrate leaching along a switchgrass (Panicum virgatum) high  resolution N-fertilizer gradient for three years post-establishment.  Results revealed an exponential increase in annual N2O emissions that each  year became stronger (R 2 > 0.9, P < 0.001) and deviated  further from the fixed percentage assumed for IPCC Tier 1 emission  factors. Concomitantly, switchgrass yields became less responsive each  year to N fertilizer. Nitrate leaching (and calculated indirect N2O  emissions) also increased exponentially in response to N inputs, but  neither methane (CH4) uptake nor soil organic carbon changed detectably.  Overall, N fertilizer inputs at rates greater than crop need curtailed the  climate benefit of ethanol production almost two-fold, from a maximum  mitigation capacity of \u22125.71 \u00b1 0.22 Mg CO2e ha\u22121 yr\u22121 in switchgrass  fertilized at 56 kg N ha\u22121 to only \u22122.97 \u00b1 0.18 Mg CO2e ha\u22121 yr\u22121 in  switchgrass fertilized at 196 kg N ha\u22121. Minimizing N fertilizer use will  be an important strategy for fully realizing the climate benefits of  cellulosic biofuel production.", "keywords": ["2. Zero hunger", "Switchgrass", "Panicum virgatum", "13. Climate action", "nitrate leaching", "IPCC emission factor", "methane (CH4) oxidation", "15. Life on land", "7. Clean energy", "Life cycle analysis", "nitrous oxide (N2O)", "6. Clean water", "nitrogen fertilizer"], "contacts": [{"organization": "Ruan, Leilei, Bhardwaj, Ajay K., Hamilton, Stephen K., Robertson, G. 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