Permanent Cover Crops Take Root

In today’s episode: what might it look like to create a better cover crop system? A group of researchers and farmers are seeking to answer this question.Cover crops can help reduce soil erosion, preserve soil biology, build organic matter, suppress weeds and improve water and nutrient retention. So why do fewer than 10% of US row crop acres incorporate cover crops? There is risk involved. The seed costs money and if the weather doesn’t cooperate, you can waste precious capital and not even get a stand. And some cover crops can be difficult to terminate, requiring herbicides, mowing, crimping or tillage, all of which can add costs and labor. “Rather than trying to breed species that are directly competing for the same resource: light water, nutrients…The proper way is actually to breed them so that they're living in their own niche.” - Sara Lira, Ph.D.How can advances in science and management help them to become a viable option for more farmers? That’s the question Dr. Sara Lira and colleagues have been asking. Sara is a research scientist at Corteva Agriscience who has been working with farmers like Chris Gaesser, who you will also hear from on this episode. Chris farms in southwest Iowa and has conducted on-farm collaborations with Sara over the years. “There's always something green on the ground. You're going to (have) a lot less nutrient leaching. The weed suppression is there, so you're creating a very stable environment…and ideally it's saving you some passes throughout the year.” - Chris GaesserSome Takeaways from this episode include:This perennial groundcover approach is a novel way of incorporating more perennials into our existing farming systems without sacrificing yield. There is no silver bullet in agriculture. Although this approach seems to be working great in a strip till system, it’s still not as effective in no-till. This emphasizes the need for more science and more solutions to fit a variety of situations. This is a great example of why farmer/researcher collaboration is so important. The solutions of the future will come from cutting edge science and technology, but also improvements in management practices and the ability to put all the pieces together on your individual farm.Agriscience Explained is brought to you by Corteva Agriscience and hosted by Tim Hammerich. This show is produced by Clint Pilcher, Rayda Krell and Ann Leonard. Jaime Hammerich and Grant Bolton edit these podcasts, and the music was composed by Dmitri Volkov. Subscribe for more Agriscience Explained: From Science to Solutions.