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• W2180221421 abstract "This study was designed to determine whether tillage systems left in place for significant periods of time develop different weed profiles. No-tillage, reduced tillage, and conventional tillage were placed in a corn/soybean rotation that had been maintained and documented for 15 years. Notillage was the only corn tillage treatment that did not lead yields for at least one year of this three-year trial. No-tillage corn had significantly higher weed pressure from several species, and soybeans had significantly higher levels of giant foxtail with no-tillage. The study also compared ridge and reduced tillage yields and weed profile development; the third year of the study constituted the eighth year that those systems were in place. Ridge tillage soybeans had higher yields and significantly higher weed pressure for a number of species; no trends were detected for corn yields or weeds. Background tunity to observe a long-standing field demonTillage systems have long been used for seedstration of four systems: conventional tillage bed preparation as well as for insect, disease, (fall plowing), reduced tillage (discing), noand weed control. At the same time, reducing tillage, and ridge tillage. These systems were soil erosion is of great concern to growers and in place for eight years on the Russ Reed farm the government alike. Conservation tillage and for 15 years at the Southeast Iowa Conser­ reduces soil erosion by allowing crop residue vation Tillage Project on the Iowa Army Amto remain on the soil surface, increasing filtramunition Plant farm. (The project was begun tion, and reducing runoff. Less tillage also in 1980 to study the time, fuel, and economic means less destruction of weeds in the initial requirements of different tillage systems.) The stages of crop growth. Growers must weigh demonstrations addressed weed species and the benefits of less tillage against the need for populations as they developed over the years. different weed management strategies. The information was intended to help farmers plan weed control strategies using sustainable The 1985 and 1990 farm bills encouraged tillage systems to comply with the farm bills. several reduced tillage systems to be used as a way to protect soil from erosion by wind and water. The overall success of such approaches will depend greatly on growers' ability to manage weeds. Farmers practicing conserva­ tion tillage can benefit from an ability to predict the type of weed pressure and weed species that are likely to develop with the different tillage systems. In 1995, some 20,000 additional acres of notillage were implemented in Des Moines County on highly erodible land. Demonstra­ tions cosponsored by Southeastern Iowa Com­ munity College in Burlington were intended to help farmers bridge the gap between new tillage technology and weed control. Des Moines County farmers were given the opporCOMPETITIVE GRANT" @default.
• W2180221421 created "2016-06-24" @default.
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• W2180221421 date "1996-01-01" @default.
• W2180221421 modified "2023-09-27" @default.
• W2180221421 title "Southeast Iowa on-farm demonstration of sustainable tillage systems and weed profile developments on those systems" @default.
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