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Irrigation Residue Removal Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network and Resilient Economic Agricultural Practices in Lincoln, Nebraska

    USDA-ARS REAP Study (Ithaca, NE) - NEMEIRR Sustainable intensification of high-yielding production systems may help meet increasing demands for food, fuel, and fiber worldwide. Specifically, corn stover is being removed by producers for livestock purposes, and stover is also targeted as a primary 2nd generation biofuel feedstock. The NEMEIRR experimental objectives are to quantify how stover removal (no removal, moderate removal, high removal) and tillage management (no-till, disk) affect crop yields, soil organic carbon, soil greenhouse gas emissions, and other soil responses (microbial community structure, function; soil health). This experiment is conducted in a fully irrigated continuous corn system in the western Corn Belt, and soil and plant measurements have been taken since study establishment in 2001.

    Assessing the rate and reversibility of large herbivore effects on community composition in a semi-arid grassland ecosystem with GZTX data on the Central Plains Experimental Range, Nunn, Colorado, USA 1992-2017

      Data supporting empirical evaluation of the effects of grazing on semi-arid grassland hypothesized by State-and-Transition models using a 25-year grazing exclosure reversal experiment in the Great Plains, US. We document rapid, reversible and symmetric effects of the imposition and removal of grazing between 1992-2017 due to differences in the rate of increase in cover of C3 midgrasses, litter and bare ground.

      Effort Versus Reward: Preparing samples for fungal community characterization in high-throughput sequencing surveys of soils

        This data set consists of four data files. The FASTA file, Representative OTU sequences.fa, contains representative sequences from the operational taxonomic units (OTUs) shown in the OTU table. FASTA files can be opened in simple text editors, and sequences can be aligned using the BLAST tool (http://blast.ncbi.nlm.nih.gov/Blast.cgi) or open source software, like AliView (http://www.ormbunkar.se/aliview/). There are two Excel data files: OTU table and heatmaps.xlsx and Diversity Indexes.xlsx. The former contains the raw abundance data for the observed OTUs from the different experimental sites. The latter is a breakdown of various diversity indices that are grouped based on experimental characteristics, such as extraction volume, extraction method, etc. Excel_Archive.zip is a compressed version of the two Excel data files that have been converted to more archival-friendly formats using Excel Archival Tool.

        Data from: USBombus, Contemporary Survey Data of North American Bumble Bees (Hymenoptera, Apidae, Bombus) Distributed in the United States

          US*Bombus* is a large dataset that represents the outcomes of the largest standardized survey of bee pollinators (*Hymenoptera*, *Apidae*, *Bombus*) on the planet. The motivation to collect live bumble bees across the US was to document the decline and conservation status of *Bombus affinis*, *B. occidentalis*, *B. pensylvanicus*, and *B. terricola*. This dataset documents a total of 17,796 adult occurrence records across 391 locations and 38 species of *Bombus*. The geospatial coverage of the dataset extends across 41 of the 50 US states and from 0 to 3500 m a.s.l. The temporal scale of the dataset represents systematic surveys that took place from 2007 to 2010. The dataset was developed using SQL server 2008 r2. For each specimen, the following information is generally provided: species name, sex, caste, temporal and geospatial details, Cartesian coordinates, data collector(s), and when available, host plants. This database has already proven useful for a variety of studies on bumble bee ecology and conservation. Considering the value of pollinators in agriculture and wild ecosystems, this large systematic collection of bumble bee occurrence records will likely prove useful in investigations into the effects of anthropogenic activities on pollinator community composition and conservation status.

          Microbial community structure is affected by cropping sequences and poultry litter under long-term no-tillage

            Soil microorganisms play essential roles in soil organic matter dynamics and nutrient cycling in agroecosystems and have been used as soil quality indicators. The response of soil microbial communities to land management is complex and the long-term impacts of cropping systems on soil microbes is largely unknown. Therefore, changes in soil bacterial community composition were assessed in response to cropping sequences and bio-covers at long-term no-tillage sites.