Take Action - United Soybean Board.
Take Action is an industry-wide partnership between university weed scientists, major herbicide providers, and corn, cotton, sorghum, soy and wheat organizations to help you manage herbicide-resistant weeds. Use this site to learn how you can diversify your weed control techniques to fight herbicide resistance.
Weeds of the North Central States - North Central Regional Research Publication 281
Common Weed Seedlings of the North Central States - Michigan State University
Weed Identification Guide - Iowa State University Extension Store
Early Spring Weeds of No-till Crop Production - North Central Cooperative Extension Service
Weed Emergence Sequence Poster - University of Illinois
Weed Identification and Herbicide Injury Guide for Corn and Soybean - IPM1007
Herbicide Mode of Action chart - University of Wisconsin
Soybean Injury from Soil-Applied Herbicides - University of Illinois, 2014
Fix it before it BREAKS: Glyphosate Stewardship - Iowa Soybean Association
Managing Weed Resistance for Higher Yield: Stewardship Keeps Technology Working for You. Iowa Soybean Association