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

dc.contributor.author Andersen, Daniel
dc.contributor.author Andersen, Daniel
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-03-08T16:33:45.000
dc.date.accessioned 2020-06-29T22:43:20Z
dc.date.available 2020-06-29T22:43:20Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2017
dc.date.issued 2017-01-01
dc.description.abstract <p>During the twentieth century, U.S. agriculture 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. The trend of increasing centralization and industrialization of agriculture, specifically animal agriculture, has resulted in the concentration of waste products associated with animal production (manures and wash-down water) over relatively small geographic areas that are spatially segregated from crop production areas. Because the distance that manure can be economically hauled for land application has practical limits, the public is concerned that this spatial separation of crop and animal production areas could lead to over-application of manures near animal feeding facilities, and thus potentially increase the transport of nutrients to ground and surface waters. An aggregated analysis (statewide) of crop and animal production in Iowa suggests that about 30% to 40% of current nitrogen and phosphorus requirements for crop production could be supplied from manures and litters generated from livestock production, while about 50% of potassium requirements could be supplied. However, neither livestock nor crop production in Iowa 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. Thus, we evaluated crop nutrient demand and manure and litter production at the county level to determine if excess manure generation is of concern and to locate areas where additional manures could be used. Results showed that several counties are becoming manure rich, but most locations maintain sufficient capacity to use manure nutrients effectively.</p>
dc.description.comments <p>This article is published as Andersen, Daniel Steven, and Laura M. Pepple. "A County-Level Assessment of Manure Nutrient Availability Relative to Crop Nutrient Capacity in Iowa: Spatial and Temporal Trends." <em>Transactions of the ASABE</em> 60, no. 5 (2017): 1669-1680. DOI: <a href="http://dx.doi.org/10.13031/trans.12417" target="_blank">10.13031/trans.12417</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/874/
dc.identifier.articleid 2157
dc.identifier.contextkey 11729129
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/874
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1684
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/874/2017_Andersen_CountyLevel.pdf|||Sat Jan 15 02:16:14 UTC 2022
dc.source.uri 10.13031/trans.12417
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Crop nutrient capacity
dc.subject.keywords Manure management
dc.subject.keywords Manure production
dc.subject.keywords Nutrient balance
dc.subject.keywords Nutrient management
dc.title A County-Level Assessment of Manure Nutrient Availability Relative to Crop Nutrient Capacity in Iowa: Spatial and Temporal Trends
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 18329603-49c4-4007-985d-2402929993a8
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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