Mixing depth will vary with the implement and soil conditions. Bladex requires one incorporation pass on soybean stubble and two incorporations in corn residue. Treflan requires two incorporation passes. In heavy residue one tillage pass is required before application. Complete incorporation calls for all the herbicide to be thoroughly mixed to a depth of 2 to 3 inches in the soil.
Shallow incorporation involves shallower and less complete mixing.
Shallow placement improves horizontal distribution compared to deeper mixing. Equipment selection, assembly, and operation are the most important factors in obtaining uniform herbicide incorporation. Equipment must be adjusted in the field to the specific conditions under which it will operate. Previous crop, amount of crop residue, soil type,drainage, previous tillage operations, and weather all require adjustments in incorporation equipment. Tillage implements spraying during a field operation.