The Inversion Technique Inversion is a preplant surface herbicide treatment which relies on soil displacement and mixing during seeding. It can be used in conventional and conservation tillage systems. Drill openers throw treated soil away from the seed zone creating a safety zone in the seed row. Firming by the press wheels prevents treated soil from slipping back into the seed row. Hoe openers produce a wider safety zone because they move more soil out of the row.
Nonselective herbicides require a wide safety zone to prevent crop damage.
Consequently hoe drills are required for inversion of materials such as atrazine or trifluralin. Disk drills, however, can be used where cereals are tolerant of applied herbicides, such as diclofop. Herbicide distribution achieved by the inversion process. Herbicide distribution and safety zones produced by inversion using hoe openers. Inversion is a shortened modification of standard soil incorporation.