Submitted to: Proceedings Sunflower Research Workshop
Publication Type: Proceedings
Publication Acceptance Date: 11/29/2002
Publication Date: 1/23/2003
Citation: Tanaka, D.L., J.M. Krupinsky, S.D. Merrill, and M.A. Liebig. Sunflower production as influenced by previous crop and crop residue. National Sunflower Research Workshop Proceedigs. 2003. Fargo, ND. Interpretive Summary: Producers need to make better use of incident precipitation by intensifying their cropping systems. Sunflower is an oilseed crop that can improve precipitation use and use water and nutrients below the rooting depth of cereals. Cropping systems that include sunflower intensifies the system, adds crop diversity, and provides agricultural sustainability. The question that arises is what crop sequence should be used in cropping systems to take advantage of the synergism among crops. Research at Mandan, ND indicates the best crop sequence for sunflower production was when the previous crop was dry bean, dry pea, or flax. Sunflower seed yields were increased 123 to 196% when compared to seed yield for continuous sunflower. The worst crop sequence for sunflower production was where the previous crop was safflower or sunflower.
Technical Abstract: Techniques and technologies to store soil water during fallow have improved fallow efficiencies, but not beyond 40%. To make better use of incident precipitation and residue potential environmental problems because of water and nutrient movement beyond the rooting depth of cereals, producers have intensified their cropping systems by reducing the frequency of fallow and adding diverse crops. Sunflower is an oilseed crop that can improve precipitation use, water and nutrient use below the rooting depth of cereals, and provide agricultural sustainability. Research was conducted in 1999 and 2000 at Mandan, ND to determine if previous crop and crop residue influenced sunflower plant stand and production. This information can help to determine the sequencing of sunflower in cropping systems. Sunflower was no-till seeded over the residue where the previous years crops were canola, crambe, dry bean, dry pea, flax, safflower, sunflower, soybean, wheat, and barley. Trends indicate sunflower production was the best when the previous crop was dry bean, dry pea, or flax. Sunflower production was the worst when the previous crop was safflower or sunflower.