How does pigweed kill?

Bulldozing, controlled burns, manual and mechanical removal, pre- and post-emergent herbicides, smother-cropping, and soil-amending are ways to get rid of pigweed. The Amaranthaceae family member in question can be controlled by hand-pulling and hoeing smaller areas. Smother-cropping with buckwheat before seeding to winter rye works in rural areas and on farmlands.