41% Glyphosate grass & weed killer is a non-selective, broad-spectrum herbicide for agricultural, residential and industrial use in non-crop areas. It has been used in forestry site preparation, at plant nurseries, and along roadsides and railroads as a way to keep the plants you want and kill every plant you do not. Post-emergent formula controls over 150 annual and perennial weeds, woody brush, vines, and trees within days of application with no residual soil activity. Ideal for large-scale application and Roundup Ready crops. It may be mixed with ammonium sulfate, drift control additives, and dyes.