A County-Level Assessment of Manure Nutrient Availability Relative to Crop Nutrient Capacity in Iowa: Analysis of Spatial and Temporal Trends

dc.contributor.author Andersen, Daniel
dc.contributor.author Andersen, Daniel
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-13T13:47:52.000
dc.date.accessioned 2020-06-29T22:33:27Z
dc.date.available 2020-06-29T22:33:27Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2013
dc.date.embargo 2013-08-28
dc.date.issued 2013-07-01
dc.description.abstract <p>During the twentieth century, agricultural production strived to achieve increased food production in order to satisfy both local and export demands. In many cases, this led to increased farm sizes and an operational separation of crop and livestock production. Society fears that the trend of increasing centralization and industrialization of agriculture, specifically animal agriculture, has resulted in concentration of waste products associated with their production (manures, wash-down water, process waters, etc.) over relatively small geographic regions that are spatially segregated from crop production areas. Since the distance that manure can be economically hauled for land application has practical limits, this could lead to over-application, of manures near animal feeding facilities, potentially increasing nutrient losses to ground and surface waters. A statewide analysis of crop and animal production in Iowa suggests that about 25% of current nitrogen and phosphorus requirements for crop production could be supplied from manures and litters, while around 40% of the required potassium could be provided. However, neither livestock nor crop production is uniformly distributed across all counties. This unequal distribution suggests that a more disaggregated analysis of crop nutrient requirements and manure nutrient supply is necessary to estimate the risks of excess nutrient loss to the environment. Results indicated that in general all counties had sufficient nutrient utilization capacities to value manure as a resource; however, counties in Northwest Iowa are becoming progressively more manure rich, while counties in Southwestern and Central Iowa are becoming progressively more manure poor. This separation of crop and livestock production is becoming more pronounced, indicating that solids separation and nutrient (especially phosphorus) recovery systems that can concentrate manure nutrients for transport could become more important to help counties maintain nutrient balance and to return manure nutrients to the soil if these trends persist.</p>
dc.identifier archive/lib.dr.iastate.edu/abe_eng_conf/322/
dc.identifier.articleid 1341
dc.identifier.contextkey 4521434
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_conf/322
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/342
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_conf/322/2013_AndersenDS_CountyLevelAssessmentManure.pdf|||Fri Jan 14 23:35:18 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Manure production
dc.subject.keywords manure use
dc.subject.keywords crop production
dc.subject.keywords nutrient capacity
dc.subject.keywords excess manure
dc.title A County-Level Assessment of Manure Nutrient Availability Relative to Crop Nutrient Capacity in Iowa: Analysis of Spatial and Temporal Trends
dc.type article
dc.type.genre conference
dspace.entity.type Publication
relation.isAuthorOfPublication 18329603-49c4-4007-985d-2402929993a8
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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