{"type": "FeatureCollection", "features": [{"id": "10.1016/j.still.2011.06.006", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-22T16:16:43Z", "type": "Journal Article", "created": "2011-07-29", "title": "A Five-Year Assessment Of Corn Stover Harvest In Central Iowa, Usa", "description": "Sustainable feedstock harvest strategies are needed to ensure bioenergy production does not irreversibly degrade soil resources. The objective for this study was to document corn (Zea mays L.) grain and stover fraction yields, plant nutrient removal and replacement costs, feedstock quality, soil-test changes, and soil quality indicator response to four stover harvest strategies for continuous corn and a corn-soybean [Glycine max. (L.) Merr.] rotation. The treatments included collecting (1) all standing plant material above a stubble height of 10 cm (whole plant), (2) the upper-half by height (ear shank upward), (3) the lower-half by height (from the 10 cm stubble height to just below the earshank), or (4) no removal. Collectable biomass from Treatment 2 averaged 3.9 ({+-}0.8) Mg ha{sup -1} for continuous corn (2005 through 2009), and 4.8 ({+-}0.4) Mg ha{sup -1} for the rotated corn (2005, 2007, and 2009). Compared to harvesting only the grain, collecting stover increased the average N-P-K removal by 29, 3 and 34 kg ha{sup -1} for continuous corn and 42, 3, and 34 kg ha{sup -1} for rotated corn, respectively. Harvesting the lower-half of the corn plant (Treatment 3) required two passes, resulted in frequent plugging of the combine, and provided a feedstockmore\u00a0\u00bb with low quality for conversion to biofuel. Therefore, Treatment 3 was replaced by a 'cobs-only' harvest starting in 2009. Structural sugars glucan and xylan accounted for up to 60% of the chemical composition, while galactan, arabinan, and mannose constituted less than 5% of the harvest fractions collected from 2005 through 2008. Soil-test data from samples collected after the first harvest (2005) revealed low to very low plant-available P and K levels which reduced soybean yield in 2006 after harvesting the whole-plant in 2005. Average continuous corn yields were 21% lower than rotated yields with no significant differences due to stover harvest. Rotated corn yields in 2009 showed some significant differences, presumably because soil-test P was again in the low range. A soil quality analysis using the Soil Management Assessment Framework (SMAF) with six indicators showed that soils at the continuous corn and rotated sites were functioning at an average of 93 and 83% of their inherent potential, respectively. With good crop management practices, including routine soil-testing, adequate fertilization, maintenance of soil organic matter, sustained soil structure, and prevention of wind, water or tillage erosion, a portion of the corn stover being produced in central Iowa, USA can be harvested in a sustainable manner.\u00ab\u00a0less", "keywords": ["2. Zero hunger", "Soil Management Assessment Framework (SMAF)", "Bioresource and Agricultural Engineering", "330", "Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "7. Clean energy", "630", "6. Clean water", "12. Responsible consumption", "Sustainability", "Nutrient removal", "0401 agriculture", " forestry", " and fisheries", "Renewable energy assessment project (REAP)", "Biofuel feedstock", "Single-pass stover harvest system", "0105 earth and related environmental sciences"], "contacts": [{"organization": "Karlen, Douglas, Hess, J. Richard, Birrell, Stuart,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.still.2011.06.006"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20and%20Tillage%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.still.2011.06.006", "name": "item", "description": "10.1016/j.still.2011.06.006", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2011.06.006"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-01T00:00:00Z"}}, {"id": "10.1098/rsfs.2010.0023", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-22T16:17:38Z", "type": "Journal Article", "created": "2011-07-12", "title": "How Can Land-Use Modelling Tools Inform Bioenergy Policies?", "description": "<p>Targets for bioenergy have been set worldwide to mitigate climate change. Although feedstock sources are often ambiguous, pledges in European nations, the United States and Brazil amount to more than 100 Mtoe of biorenewable fuel production by 2020. As a consequence, the biofuel sector is developing rapidly, and it is increasingly important to distinguish bioenergy options that can address energy security and greenhouse gas mitigation from those that cannot. This paper evaluates how bioenergy production affects land-use change (LUC), and to what extent land-use modelling can inform sound decision-making. We identified local and global internalities and externalities of biofuel development scenarios, reviewed relevant data sources and modelling approaches, identified sources of controversy about indirect LUC (iLUC) and then suggested a framework for comprehensive assessments of bioenergy. Ultimately, plant biomass must be managed to produce energy in a way that is consistent with the management of food, feed, fibre, timber and environmental services. Bioenergy production provides opportunities for improved energy security, climate mitigation and rural development, but the environmental and social consequences depend on feedstock choices and geographical location. The most desirable solutions for bioenergy production will include policies that incentivize regionally integrated management of diverse resources with low inputs, high yields, co-products, multiple benefits and minimal risks of iLUC. Many integrated assessment models include energy resources, trade, technological development and regional environmental conditions, but do not account for biodiversity and lack detailed data on the location of degraded and underproductive lands that would be ideal for bioenergy production. Specific practices that would maximize the benefits of bioenergy production regionally need to be identified before a global analysis of bioenergy-related LUC can be accomplished.</p>", "keywords": ["[SDV.SA]Life Sciences [q-bio]/Agricultural sciences", "0301 basic medicine", "MISCANTHUS", "330", "550", "AGRICULTURE", "01 natural sciences", "7. Clean energy", "333", "12. Responsible consumption", "ENERGY", "03 medical and health sciences", "ORGANIC-CARBON", "BENEFITS", "11. Sustainability", "feedstocks", "SWITCHGRASS", "indirect land-use change", "0105 earth and related environmental sciences", "2. Zero hunger", "[SDV.SA] Life Sciences [q-bio]/Agricultural sciences", "GREENHOUSE-GAS EMISSIONS", "CLIMATE-CHANGE", "15. Life on land", "biofuels", "NITROGEN", "greenhouse gas", "13. 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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. 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