This dataset includes global rasters of terrestrial biological nitrogen fixation (BNF) rates (in kgN/(ha*y)) for each major N-fixing niche in natural biomes (trees, shrubs, herbs, soil, litter, dead wood, ground mosses, biocrusts, and epiphytic lichens) and agricultural biomes (legume crops, forage legumes, and rice). It also includes total natural terrestrial, total agricultural, and total terrestrial BNF rasters. The dataset contains rasters with central and confidence interval values at 0.004 and 1-degree resolution.

This dataset includes global rasters of terrestrial biological nitrogen fixation (BNF) rates (in kgN/(ha*y)) for each major N-fixing niche in natural biomes (trees, shrubs, herbs, soil, litter, dead wood, ground mosses, biocrusts, and epiphytic lichens) and agricultural biomes (legume crops, forage legumes, and rice). It also includes total natural terrestrial, total agricultural, and total terrestrial BNF rasters. The dataset contains rasters with central and confidence interval values at 0.004 and 1-degree resolution.

This dataset includes global rasters of terrestrial biological nitrogen fixation (BNF) rates (in kgN/(ha*y)) for each major N-fixing niche in natural biomes (trees, shrubs, herbs, soil, litter, dead wood, ground mosses, biocrusts, and epiphytic lichens) and agricultural biomes (legume crops, forage legumes, and rice). It also includes total natural terrestrial, total agricultural, and total terrestrial BNF rasters. The dataset contains rasters with central and confidence interval values at 0.004 and 1-degree resolution.

This dataset describes the estimates of gridded nitrogen fixation from various sources globally. The global gridded datasets of BNF generated here are available in the ScienceBase repository (https://www.sciencebase.gov/catalog/item/66a97480d34e07a119db3a37). The underlying BNF rate dataset in natural terrestrial biomes is also available in the ScienceBase repository (https://www.sciencebase.gov/catalog/item/66a97365d34e07a119db3a30). All other data are available from the databases cited or are in the main text or the supplementary materials. The links will be made active upon acceptance. Portions of this dataset are inaccessible because: See link above. They can be accessed through the following means: See link above. Format: See link above. This dataset is associated with the following publication: Reis Ely, C.R., S.S. Perakis, C.C. Cleveland, D.N.L. Menge, S.C. Reed, B.N. Taylor, S.A. Batterman, C.M. Clark, T.E. Crews, K.A. Dynarski, M. Gei, M.J. Gundale, D.F. Herridge, S.E. Jovan, S. Kou-Giesbrecht, M.B. Peoples, J. Piipponen, E. Rodríguez-Caballero, V.G. Salmon, F.M. Soper, A.P. Staccone, B. Weber, C.A. Williams, and N. Wurzburger. Global terrestrial nitrogen fixation and its modification by agriculture. NATURE. Nature Portfolio, Berlin, GERMANY, 643(8072): 705-711, (2025).

,A stationary camera used to track vegetation phenology overlooking a row crop field that is in an aspirational cropping system (corn/soybean rotation with a living much - Kura Clover). This site is located at the Rosemount Research and Outreach Center in Rosemount, Minnesota. Images are taken every 30 minutes. A link to the Phenocam's network FAQ: https://phenocam.sr.unh.edu/webcam/faq,

This dataset contains data supporting the paper: DeCrappeo, N.M., DeLorenze, E.J., Giguere, A.T., Pyke, D.A., and Bottomley, P.J. Fungal and bacterial contributions to nitrogen cycling in cheatgrass-invaded and uninvaded native sagebrush soils of the western USA (accepted at the journal Plant and Soil). The purpose of the study was to evaluate the relative contributions of soil bacteria and fungi to inorganic nitrogen (N) cycling in sagebrush and cheatgrass-invaded soils using a 15N isotope dilution experiment. Soils were collected from sagebrush and cheatgrass rhizospheres at six paired sites in southwest Idaho and southeast Oregon. In order to partition the contribution of each microbial group to N cycling, soils were treated with isotopically labeled N sources and protein synthesis inhibitors. Bronopol and cycloheximide block protein synthesis in bacteria and fungi, respectively; nitrogen can still be taken up by the organisms, but the organisms are unable to assimilate the nutrient into biomass. Laboratory incubations were carried out to study the partitioning of N to microbial biomass and dissolved inorganic nitrogen pools, which were then used to calculate the following nitrogen transformation rates: gross mineralization, net mineralization, ammonium consumption, and net nitrification.

This dataset contains data supporting the paper: DeCrappeo, N.M., DeLorenze, E.J., Giguere, A.T., Pyke, D.A., and Bottomley, P.J. Fungal and bacterial contributions to nitrogen cycling in cheatgrass-invaded and uninvaded native sagebrush soils of the western USA (accepted at the journal Plant and Soil). The purpose of the study was to evaluate the relative contributions of soil bacteria and fungi to inorganic nitrogen (N) cycling in sagebrush and cheatgrass-invaded soils using a 15N isotope dilution experiment. Soils were collected from sagebrush and cheatgrass rhizospheres at six paired sites in southwest Idaho and southeast Oregon. In order to partition the contribution of each microbial group to N cycling, soils were treated with isotopically labeled N sources and protein synthesis inhibitors. Bronopol and cycloheximide block protein synthesis in bacteria and fungi, respectively; nitrogen can still be taken up by the organisms, but the organisms are unable to assimilate the nutrient into biomass. Laboratory incubations were carried out to study the partitioning of N to microbial biomass and dissolved inorganic nitrogen pools, which were then used to calculate the following nitrogen transformation rates: gross mineralization, net mineralization, ammonium consumption, and net nitrification.

The FIFE Standing Crop and Nitrogen Content Data Set contains biomass and nitrogen concentration data for live and dead above-ground plant material collected along transects in watersheds within the FIFE study area. The transects were in watersheds that had undergone burning and grazing treatments. Point physical descriptors (elevation, slope, and soil depth) are also included in the data set. Substantial variation in biomass, and N accumulation occurred over time, with topography, and as a result of grazing and previous burning (Schimel et al. 1991a, Kittel et al. 1990, Turner et al. 1992, Davis et al. 1992).

metadata entry for publication. Portions of this dataset are inaccessible because: data uploaded in ScienceHub. They can be accessed through the following means: contact first author on the paper. Format: Excel data file containing sampling locations, names, and all sampling data (nutrient, nitrate isotope, E. coli, and microbial source tracking data. This dataset is associated with the following publication: Zimmer-Faust, A., C. Brown, O. Shanks, W. Rugh, T.C. Mochon Collura, and H. Stecher. An integrated approach to coupled nutrient and microbial source tracking in an agricultural watershed. WATER RESEARCH. Elsevier Science Ltd, New York, NY, USA, (272): 122981, (2025).