This document summarizes a presentation given by Dr. Johannes Keizer of the Food and Agriculture Organization (FAO) of the United Nations. The presentation discusses the 10-year Agricultural Ontology Initiative to build a linked data infrastructure for agricultural knowledge. It provides an overview of FAO's AGROVOC concept scheme and other agricultural ontologies developed through partnerships. It also describes semantic tools and technologies used by the Agricultural Ontology Service (AOS) to link and aggregate agricultural data into a global linked open data cloud.