1. Letters following this symbol are a WSSA-approved computer code from Composite List of Weeds, Revised 1989. Available from WSSA, 309 West Clark Street, Champaign, IL 61820.
2. Soybean Response to Different Planting Patterns and Dates
1,3
3. Weed control in conservation tillage;Koskinen;J. Soil Water Conserv.,1986
4. X-77–Nonionic-type spreader and activator. Principle functioning agents: Alkylaryl polyoxyethylene, free fatty acids, glycols, isopropanol. Constituents effective as spray adjuvant–90%. Constituents ineffective as spray adjuvant–10%. Valent U.S.A. Corp., 1333 N. California Blvd., P.O. Box 8025, Walnut Creek, CA 94596-8025.
5. Surfel–83% paraffin based petroleum oil, 15% polyol fatty acid esters and polyethoxylated derivatives thereof, and 2% components ineffective as spray adjuvant. Rhone-Poulenc AG Co., P.O. Box 12014, 2 T.W. Alexander Dr., Research Triangle Park, NC 27709.