It can get pretty confusing for some of us Harvey. The land at Wolfskill (near Winters, CA) was donated to and is owned by the University of California at Davis--some of that land is under long term lease to the USDA for the National Clonal Germplasm Repository at Davis (one of 32 NCGRs in the US). The rest of the land at Wolfskill is used by UC Davis Department of Plant Sciences.
Your point is a good one. The fig and pomegranate cuttings that we get from the NCGR at Davis are prepared and shipped by these US Department of Agriculture employees (http://www.ars.usda.gov/Aboutus/aboutus.htm?modecode=53-06-20-00), not anyone employed by UC Davis.
They deserve the recognition (and a round of applause) for the excellent work that they do maintaining and distributing this collection.