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Description: Subsurface drainage is a water management strategy that uses tile drains to remove excess water from poorly drained soils and maintain soil conditions near field capacity following heavy rainfall. Due to spring snowmelt, Manitoba experiences excess soil water during the early growing season. High-intensity storm events during the growing season also led to fluctuating water table depths. This research aimed to evaluate soybean yield under different water table depths under subsurface drainage and no drainage conditions in heavy clay soil in the Interlake region of Manitoba. Tile drains were installed at a depth of 0.9 to 1.1 m at 4.5, 9, 13.7 m (14, 30, 45 ft) spacing. The soybean yield was obtained over the tile, midway between tiles, and in no tile plots. Water table depths were continuously monitored. During the dry years of 2020 and 2021, the yield was lower in all the plots. During the wet year of 2022, the over the tile yield was significantly higher than the control because the watertable was maintained lower during vegetative stage.

Keywords: Subsurface drainage, water table depth, long-term average
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Date: 2024-07-07
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Conference name: CSBE/SCGAB 2023 Annual Conference, Winnipeg, Manitoba, 7-10 July 2024.
Session name: Concurrent Technical Session 3A: Soil & Water Engineering 2

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Type: Presentation
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Publication type: Text.Abstract
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Coverage: North_America
Language 1: en
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Rights: Canadian Society for Bioengineering
Notes:1: University of Manitoba, Canada; 2: Prairie East Sustainable Agriculture Initiative and Manitoba Agriculture, Manitoba, Canada
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