Figure 1 Location of soil samples collected in 2025.

Have you ever wondered what weed seeds are lurking in your soil? The University of Missouri Weed Science program is continuing a statewide project to better understand the abundance and diversity of weed seeds present in Missouri agricultural fields, and we need your help. Last year, we collected and analyzed approximately 1,500 soil samples from 29 Missouri counties (see figure 1) and identified more than 80 different weed species.

This fall, we hope to expand our sampling efforts into additional counties and fields across the state. Farmers, crop consultants, and other agricultural professionals are encouraged to participate by collecting duplicate soil samples during routine soil sampling for nutrient analysis, whether those are composite samples from an entire field or samples collected via grid sampling. Participants will be asked to provide GPS coordinates of each soil sample location, corresponding soil test results, and complete a brief survey about field history and management practices. In return, participants will receive information about the weed seeds identified in their samples.

If you are interested in participating, follow the link (MU Weed Science Soil Seedbank Survey Submission Form – Fill out form) or QR code for sampling instructions, a survey form, and a prepaid shipping label. If you have any questions about the project, contact Jesse Yount at jcyhmz@missouri.edu.