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.
Life Cycle Assessment
The Life Cycle Assessment (LCA) collection is a catalog and archive of data, tools, and resources that support LCA for agriculture and related areas of research. It is complementary to the USDA LCA Commons Life Cycle Inventory (LCI) database, and provides access to a wider range LCA data and tools.
Life Cycle Assessment (also known as life cycle analysis, or cradle-to-grave analysis) is a method of assessing environmental impacts associated with all stages of a product's life. For example, it measures impact from raw material extraction to materials processing, manufacture, distribution, use, repair and maintenance, and disposal or recycling. The goal of LCA is to compare the full range of environmental effects assignable to products and services by quantifying all inputs and outputs of material flows, and then assessing how these material flows impact the environment. This information is used to improve processes, support policy, and provide a sound basis for informed decisions.
Browse Life Cycle Assessment Resources
- Life Cycle Assessment Tools is a catalog of tools for life cycle data management
- USDA Life Cycle Assessment Commons Inventory Data is a collection of unit processes, formatted for use in LCA software.
- Case Studies and Supporting Data provides access to supporting data that are not formatted for use in LCA software.
This dataset contains crosswalk unit processes. These processes provide a transparent linkage between version 1 field crop production unit processes on the USDA LCA Commons and upstream ecoinvent version 2.2 unit process providers.
This document describes the preparation of datasets for the LCA Commons that represent unit process/ gate-to-gate operations for field operations (a.k.a. work processes e.g., soil preparation and planting for conventional tillage, applying fertilizer with incorporation) and farm implements (e.g., operation of moldboard plows, broadcast sprayers) used in the production of field crops. The data cover 49 types of field operations and 104 types of farm implements for 9 crops in 36 U.S. states, resulting in the development of almost 19,000 unit process datasets. The field operation and farm implement datasets described herein fall between the field crop production and the aggregated fleet equipment datasets already in the Commons.
This excel workbook is a compilation of the major metadata schemas for life cycle assessment.
Unit process data for bio-jet fuel production from poplar biomass via bioconversion at a biorefinery
A partial Life Cycle Assessment (LCA) is conducted to investigate the life cycle impacts of a biorefinery designed to convert poplar tree chips into jet fuel via fermentation and subsequent hydrogenation. The goal of producing jet fuel from Populus (poplar) trees (bio-jet) is to create an alternative to petroleum based jet fuel (petro-jet). Currently no jet fuel producing biorefineries are in commercial operation and the results of this LCA will be used to assess a potential environmental impact that could result from scaling up the proposed system. Work is part of the Advanced Hardwood Biofuels Northwest project.
Data from: Comparative farm-gate life cycle assessment of oilseed feedstocks in the Northern Great plains
This MS Word document contains the oilseed feedstock farm-gate model inventories, results, and uncertainty analyses for the Northern Great Plains discussed in Moeller et. al 2017. Analysis was conducted using IPCC GHG standardized emissions. Methodology is detailed in the associated publication (doi: 10.1007/s41247-017-0030-3). The supplementary information contains the names of the ecoinvent inventories; oilseed yield, seeding rates, and fertilization rates per USDA crop management zone (CMZ); climate change, freshwater eutrophication, and marine eutrophication percent contributions ReCiPe results per CMZ; Monte Carlo uncertainty results per CMZ; and farm-gate energy balance analysis results per CMZ.