Eric Walker added How Superweeds Like Palmer Amaranth Are Changing Agriculture - The New York Times to a number of topics

Eric Walker added a number of topics and America is using fewer pesticides now than in the '90s. But they’re more deadly. - The Academic Times to Herbicides and pesticides, and added Herbicides and pesticides to Agriculture and farming, Biology and Atoms, molecules, chemicals, minerals, materials and compounds

Eric Walker added How Superweeds Like Palmer Amaranth Are Changing Agriculture - The New York Times to Dicamba, and added Dicamba to Herbicides and pesticides