Subsurface Drainage, L1-151
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Short summary
This is one of SLU´s agricultural long-term experiments within the subject area Water Management.
A clear strategy for adapting agricultural drainage to climate change is important for environmental and economic reasons. In this project with the overall aim of developing recommendations for future drainage of clay soils, we are studying how re-drainage affects nutrient leaching and crop yield, and in particular the impact of drain spacing (with/without lime filter) on nitrogen and phosphorus losses and crop yield.
Re-drainage has been studied since 2019 in a field experiment (clay soil) at Gölja, Västmanland (59o48’26’’N 16o47’09’’E). The field trial consists of 12 randomized individually drained plots allocated to four treatments (A-D, each with three replicates): A) clay tiles, 10 m drain spacing; B) plastic pipes, 10 m drain spacing; C) plastic pipes, 5 m drain spacing; and D) plastic pipes, 10 m drain spacing plus lime incorporation in trench backfill.
Flow measurement and flow-proportional logger-controlled water sampling on subsurface runoff from each individual plot are performed at a measuring station. The farmer conventionally manages the field trial.
Contact: Ingrid Wesström, senior lecturer, Department of Soil and Environment, ingrid.wesstrom@slu.se, +4618673492