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Unit process data for agricultural self-propelled equipment version 1

This document describes the preparation of datasets for the LCA Digital Commons that represent unit process/ gate-to-gate operations for the production of work (in MJ) by agricultural self-propelled equipment and fleets of agricultural self-propelled equipment. The data cover 19 types of fleets and over 200 types of self-propelled equipment datasets, representing the potential to prepare thousands of unit-process datasets by varying the operating and model years, applicable power ranges, and operating temperatures.

The key information source used for datasets development is the documentation and supporting data developed for the US Environmental Protection Agency (USEPA) NONROAD2008a model. In addition to the data and mathematical relationships described in the NONROAD documentation, data from a range of sources are used to add lubricant use and management estimates; add equipment production and storage, spare parts production, and equipment retirement estimates; estimate specific air emissions and groupings of air emissions; and add variability and uncertainty estimates.

Equipment operation models are aggregated to the state level based on typical operating temperatures in each state.

Dataset Info

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Cooper, Joyce
Noon, Michael
Kahn, Ezra
Johnson, Ryan
Product Type
Temporal Coverage
Intended Use
These models were developed as specific, average or generic unit process or LCI results data sets for use in “Accounting” situations (C2) as described in European Commission - Joint Research Centre - Institute for Environment and Sustainability: International Reference Life Cycle Data System (ILCD) Handbook - General guide for Life Cycle Assessment - Detailed guidance. First edition March 2010. EUR 24708 EN. Luxembourg. Publications Office of the European Union; 2010.
Use Limitations
These unit process models are aggregated to the state level. They may be aggregated regionally or nationally with proper documentation of the aggregation method.
Ag Data Commons
Contact Name
Cooper, Joyce
Contact Email
Public Access Level
Preferred Dataset Citation
Cooper et. al. (2014) “Unit process data for agricultural self-propelled equipment, Version 1” University of Washington Design for Environment Laboratory. Unpublished report. https://data.nal.usda.gov/dataset/unit-process-data-agricultural-self-propelled-equipment-version-1
Related Article

Cooper, J., Noon, M., & Kahn, E. (2012). Parameterization in Life Cycle Assessment inventory data: review of current use and the representation of uncertainty. International Journal of Life Cycle Assessment, 17(6), 689-695. http://dx.doi.org/10.1007/s11367-012-0411-1

Cooper, J., Kahn, E., & Ebel, R. (2012). Sampling error in US field crop unit process data for life cycle assessment. International Journal of Life Cycle Assessment, 18(1), 185-192. http://dx.doi.org/10.1007/s11367-012-0454-3

Related Content
USDA-ARS-NAL LCA Commons Staff
Funding Source(s)
Agricultural Research Service
Dataset DOI (digital object identifier)
Modified Date
Release Date
Ag Data Commons Keywords: 
  • Plants & Crops
  • Life Cycle Assessment
  • Plants & Crops
State or Territory: 
National Agricultural Library Thesaurus Term: 
ISO Topic(s):