Terrace Farming
What Is Terrace Farming?
Terrace farming is a method of cultivating steep slopes by creating step-like, contour-parallel platforms known as terraces (Paul Halstead et al., 2000). These anthropogenic landforms transform hillsides into manageable agricultural surfaces, primarily to minimize soil erosion and facilitate water management (Paul Halstead et al., 2000). Historically practiced across Asia, South America, and Africa, this technique allows for permanent cropping in areas where population growth has outpaced the capacity of shifting cultivation (Martin F. Price et al., 2013).
Core Mechanism and Components of Terracing
The basic structure of an agricultural terrace consists of a flat cultivation surface called a tread and a vertical or near-vertical wall known as a riser (Paul Halstead et al., 2000). Risers are constructed from masonry or earth, while treads vary from flat to gently sloping (Paul Halstead et al., 2000). This configuration acts as a cross-slope barrier, slowing surface runoff and increasing the time available for water to infiltrate the soil profile (Danilo Godone et al., 2011).
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Procedural Stages of Terrace Construction
Construction typically begins by placing a line of rocks along a hillside's contour to form the front of the terrace (John Salmon et al., 2013). Farmers then dig out earth from behind this line and ramp it up to create a level space (John Salmon et al., 2013). As the wall grows with additional courses of stone, the level area expands until the desired width is reached. This labor-intensive process is often performed during agricultural slack seasons (John Salmon et al., 2013).
Outcomes and Environmental Impact
Terrace farming significantly reduces soil erosion and increases land productivity on steep terrain (Danilo Godone et al., 2011). By decanting water efficiently and holding soil in place, it maintains and potentially increases fertility through proper farming methods (Donald R. Coates et al., 2020). However, abandonment of these structures can lead to catastrophic results, such as landslides and gully erosion, as the lack of human maintenance causes walls to collapse and soil to destabilize (Martin F. Price et al., 2013)(S. Wicherek et al., 2012).
