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# CITATION file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "manureshed" in publications use:'
type: software
license: MIT
title: 'manureshed: Spatiotemporal Nutrient Balance Analysis Across Agricultural and
  Municipal Systems'
version: 0.1.5
identifiers:
- type: doi
  value: 10.32614/CRAN.package.manureshed
- type: url
  value: https://exelegch.github.io/manureshed-docs/
abstract: A comprehensive framework for analyzing agricultural nutrient balances across
  multiple spatial scales (county, 'HUC8', 'HUC2') with integration of wastewater
  treatment plant ('WWTP') effluent loads for both nitrogen and phosphorus. Supports
  classification of spatial units as nutrient sources, sinks, or balanced areas based
  on agricultural surplus and deficit calculations. Includes visualization tools,
  spatial transition probability analysis, and nutrient flow network mapping. Built-in
  datasets include agricultural nutrient balance data from the Nutrient Use Geographic
  Information System ('NuGIS'; The Fertilizer Institute and Plant Nutrition Canada,
  1987-2016) <https://nugis.tfi.org/tabular_data/> and U.S. Environmental Protection
  Agency ('EPA') wastewater discharge data from the 'ECHO' Discharge Monitoring Report
  ('DMR') Loading Tool (2007-2016) <https://echo.epa.gov/trends/loading-tool/water-pollution-search>.
  Data are downloaded on demand from the Open Science Framework ('OSF') repository
  to minimize package size while maintaining full functionality. The integrated 'manureshed'
  framework methodology is described in Akanbi et al. (2025) <https://doi.org/10.1016/j.resconrec.2025.108697>.
  Designed for nutrient management planning, environmental analysis, and circular
  economy research at watershed/administrative to national scales. This material is
  based upon financial support by the National Science Foundation, EEC Division of
  Engineering Education and Centers, NSF Engineering Research Center for Advancing
  Sustainable and Distributed Fertilizer Production (CASFER), NSF 20-553 Gen-4 Engineering
  Research Centers award 2133576. We thank Dr. Robert D. Sabo (U.S. Environmental
  Protection Agency) for his valuable contributions to the conceptual development
  and review of this work. We acknowledge Dr. Sheri Spiegal (U.S. Department of Agriculture–Agricultural
  Research Service) for foundational contributions to the manureshed classification
  framework (Spiegal et al. 2020) <https://doi.org/10.1016/j.agsy.2020.102813>.
authors:
- family-names: Akanbi
  given-names: Olatunde D.
  email: olatunde.akanbi@case.edu
  orcid: https://orcid.org/0000-0001-7719-2619
- family-names: Mandayam
  given-names: Vibha
  orcid: https://orcid.org/0009-0008-8628-9904
- family-names: Gupta
  given-names: Atharva
  orcid: https://orcid.org/0009-0004-5372-0260
- family-names: Flynn
  given-names: K. Colton
  orcid: https://orcid.org/0000-0002-5718-1071
- family-names: Yarus
  given-names: Jeffrey
  orcid: https://orcid.org/0000-0002-9331-9568
- family-names: Barcelos
  given-names: Erika I.
  email: erika.barcelos@case.edu
  orcid: https://orcid.org/0000-0002-9273-8488
- family-names: French
  given-names: Roger H.
  email: roger.french@case.edu
  orcid: https://orcid.org/0000-0002-6162-0532
preferred-citation:
  type: manual
  title: 'manureshed: An Open-Source R Package for Scalable Temporal and Multi-Region
    Analysis of Integrated Agricultural-Municipal Nutrient Flows'
  authors:
  - family-names: Akanbi
    given-names: Olatunde D.
    email: olatunde.akanbi@case.edu
    orcid: https://orcid.org/0000-0001-7719-2619
  - family-names: Mandayam
    given-names: Vibha
    orcid: https://orcid.org/0009-0008-8628-9904
  - family-names: Gupta
    given-names: Arthava
  - family-names: Flynn
    given-names: K. C.
  - family-names: Yarus
    given-names: Jeffrey M.
  - family-names: Barcelos
    given-names: Erika I.
    email: erika.barcelos@case.edu
    orcid: https://orcid.org/0000-0002-9273-8488
  - family-names: French
    given-names: Roger H.
    email: roger.french@case.edu
    orcid: https://orcid.org/0000-0002-6162-0532
  year: '2025'
  notes: R package version 0.1.5
  url: https://osf.io/g39xa/
repository: https://cwru-sdle.r-universe.dev
repository-code: https://github.com/cwru-sdle/manureshed
commit: 8ba8ec237dd7eb064ab26423351c469832343744
url: https://osf.io/g39xa/
date-released: '2026-05-11'
contact:
- family-names: Akanbi
  given-names: Olatunde D.
  email: olatunde.akanbi@case.edu
  orcid: https://orcid.org/0000-0001-7719-2619
references:
- type: article
  title: 'Towards Circular Nutrient Economies: An Integrated Manureshed Framework
    for Agricultural and Municipal Resource Management'
  authors:
  - family-names: Akanbi
    given-names: Olatunde D.
  - family-names: Gupta
    given-names: Arthava
  - family-names: Mandayam
    given-names: Vibha
  - family-names: Flynn
    given-names: K. C.
  - family-names: Yarus
    given-names: Jeffrey M.
  - family-names: Barcelos
    given-names: Erika I.
  - family-names: French
    given-names: Roger H.
  journal: Resources, Conservation and Recycling
  year: '2025'