1. Jointed goatgrass spikelets, on average, contain two seeds (Donald and Ogg 1991).
2. Anderson R. L. 1994. Management strategies for winter annual grass weeds in winter wheat. In Murphy L. S. , ed. Proc. Intensive Wheat Management Conference. March 10–11, 1994. Denver CO: Phosphate & Potash Institute and Foundation for Agricultural Research. pp. 114–122.
3. American Clayworks and Supply Co., Denver, CO 80204.
4. Competition between winter wheat (Triticum aestivum) cultivars and downy brome (Bromus tectorum);Challaiah;Weed Sci.,1986
5. SigmaPlot. Jandel Scientific, San Rafael, CA 94901.