"When to treat quackgrass most effectively with chlorates."; "Rowley, Homer King."; "Weeds--Control.", "Quitch-grass."; "Rowley, Homer King."; "1931"; "Journal article reprint from: Journal of the American Society of Agronomy, v.23, no.1 (1931:Jan.). "; ""; "P1155"; "pec"; "Weeds--Control.", "Quitch-grass."; "14256"; .