The IPCC values are used to approximate the relative impact of direct land use change on life cycle carbon emissions.
Indirect land use (ILUC) change is not included in this LCA as there is a great deal of uncertainty related to current ILUC models.
In addition, the amount of indirect land use change is expected to be modest since the study targets use of fallowed land.
ILUC is important to consider, but more reliable land use models are needed to enable their use in life cycle assessments