Harold Bockelman Join Dr. Harold Bockelman in the winter- and spring-habit nurseries of the National Small Grains Collection (NSGC) in Aberdeen, Idaho. Learn about the triticale, rye, oat, barley, wheat, and Aegilops (a wild relative of wheat) regenerated in the field. NSGC is a part of the U.S. National Plant Germplasm System (NPGS)–the system of genebanks responsible for conserving diverse plant genetic resources in the United States.