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Yield Recovery Effects of Autosteering in Peanut Digging
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 2020 ASABE Annual International Virtual Meeting 2001256.(doi:10.13031/aim.202001256)
Authors: Loren A Samenko, Kendall R Kirk, Aaron P. Turner, Benjamin B Fogle
Keywords: Peanut, precision agriculture, harvest losses, guidance, autosteer.
Abstract. Research was conducted at Clemson University‘s Edisto Research and Education Center to determine the recovered yield effects of autosteer assisted steering versus manual steering during peanut digging operations. The test was a random block design with four replications consisting of twelve digging treatments: autosteer assisted steering and unassisted steering by eleven separate operators of varying experience and backgrounds. Each participant operated a two-row automated depth controlled KMC 2-38 peanut digger while digging the peanut variety FloRun 331; all plots were planted with the use of autosteer. Plots were 23 m (75ft) long and planted using RTK autosteering. GPS positions were recorded at 1 Hz along the entire length of the plot for both autosteer assisted and unassisted steering. All plots were dug at 2000 rpm in the same gear range, resulting in consistent ground speeds of 4.0 kph (2.5 mph). Guidance lines were created for each plot using offsets of the planting AB line and used to define digger pass guidance lines. Using these digger pass guidance lines, a cross track formula was used to calculate deviation from the guidance line for each observed position along the plot and averaged for each plot. Recovered yield data was collected for each plot using a 2-row plot combine. Results from the testing demonstrated recovered yields ranging from 3,602 kg ha-1 (3,213 lb ac-1) to 5,088 kg ha-1 (4,539 lb ac-1) for the eleven operators and averaging 4,727 kg ha-1 (4,218 lb ac-1) for autosteer. Reduction in recovered yield per unit of guidance line deviation was 72.64 kg ha&-1 cm&-1 (165 lb ac-1 in.-1). Average guidance line deviation ranged from 5.1 to 17.2 cm (2.0 to 6.8 in.) for the eleven operators and 1.1 cm (0.4 in.) for the autosteer dug plots. The data suggested substantial reduction in yield recovery as a function of guidance line deviation and characterized variability during peanut digging operations that typically are associated without the use of autosteering technology.
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