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Report on "tye-drill" modifications for sowing soybeans on commercial farms under no-till conditions

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Title: Report on "tye-drill" modifications for sowing soybeans on commercial farms under no-till conditions
Author: Southwestern Ontario Agricultural Research Corporation (SWOARC)
Abstract: In 1988, a study was initiated by a group of farmers in Rondeau Bay area of Kent County. The goal of the study was determine if more aggressive and better matched coulter/presswheelcombinations would improve the performance of the Tye drill for narrow row planting of soybeans in a no-till system. Experiments with the Tye drill in previous years had shown a tendency for poor seed establishment due to non-uniform seed depth, resulting in theexposure and desiccation of the seed. ln year one of the study, side by side comparisons of crop performance were made for fields planted with the Tye drill and with conventional planting units. The Tye drill was outfitted on one side with a bubble coulter and two V-presswheels with 8" rows,and on the other side with a fluted coulter and a single presswheel. The results of the first year of research were inconclusive, due in part to the drought of 1988. While plant populations at two of the five sites were significantly higher on fields planted with the Tye drill compared to the conventional planter, the differencesin yields were not significant. The study continued in 1989 using the same comparisons as in Year 1, with some additional treatments. The Tye drill equipped with 1" fluted coulters across the front was outfitted on the left half portion of the drill rows with single presswheels while the other half had standard V-type (double) presswheels. On demand, a rake could be dropped behind the full width of the drill. It was hoped that one of these combinations would provide a more favourable seedbed environment, which would translate into greater emergence and yields.The results of the 1989 field season were not encouraging for any of the Tye drill treatments. At all of the sites, plants seeded with conventional planters experienced more rapid and vigorous emergence when compared to all other treatments. At all but one of the sites, the yield on the plot that was planted with the conventional planter was greater than any of the corresponding yields from the Tye drill treatments. The results of two years of experiments with the Tye drill were not conclusive. The farmers who were involved in the study are still interested in making minor adjustments to the coulters ofthe Tye drill in an effort to improve the seed placement. They would also like to evaluate the performance of the Tye drill on afield scale. There was some feeling amongst the farmers involved in the research, that the plot scale research may have introduced errors and biased the results in favour of the planters.
Date: 1992
Rights: In Copyright - Non-Commercial Use Permitted
Rights Holder: Agriculture Canada

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