Understanding Surface Drainage and Bedding

Surface drainage is a crucial agricultural practice used to remove excess water from the soil surface. This helps prevent waterlogging, which can harm crop growth by reducing aeration in the root zone.

Several methods exist for surface drainage. The question asks about a specific method that utilizes 'dead furrows'. Let's examine the options:

• Outlet drains: These are channels or pipes that carry collected drainage water away from the field to a larger drainage system or natural water body. While essential for any drainage system, they are the final destination for water, not a method creating the drainage pattern itself on the surface.
• Surface outlet: Similar to outlet drains, this refers to the point where surface water leaves the field or a specific drainage area. It's a component of a surface drainage system but not the method used across the field surface to channel water.
• Bedding: This is a surface drainage method commonly used on flat land with slowly permeable soils. It involves creating a series of raised beds separated by parallel dead furrows. Farming operations (plowing, planting, cultivating) are performed parallel to these furrows. Water collects in the dead furrows and flows along them to an outlet drain or surface outlet. The dead furrows act as shallow drainage channels.
• French drain: This is a type of subsurface drainage system. It typically involves a trench filled with gravel or rock, often containing a perforated pipe, to collect groundwater and redirect it. It is not a surface drainage method using dead furrows.

Based on the description, the method of surface drainage that specifically makes use of dead furrows is Bedding.

In the bedding method:

• The field is divided into narrow strips or "beds".
• Soil is typically thrown towards the center of the bed during tillage, creating a slightly raised surface.
• The spaces between the beds become shallow depressions called dead furrows.
• These dead furrows collect surface water runoff from the beds and carry it away.

Therefore, Bedding is the correct surface drainage method that employs dead furrows.