Movement of herbicides into the soil profile is of common interest to producers that utilize irrigation systems as methods of chemical incorporation. Studies have been conducted to evaluate the depth of infiltration and the performance of weed control of dimethenamid, metolachlor, pendimethalin formulated as an emulsifiable concentrate formulation, and pendimethalin formulated in water soluble caplets. Dimethenamid, pendimethalin, and metolachlor are pre-emergence herbicides that mainly enter the plant through the root tips upon seed germination or emerging shoots and do not effect existing plant populations. All of these herbicides can or must be incorporated into the soil profile either through mechanical incorporation, rainfall, or irrigation in order to be effective. To compare the ability of these herbicides to move into the germination zone of seedling weeds, hand-packed soil columns were utilized in addition to weed control field trials.