Maria _____ diez meses trabajando en Panama.
How does the growth of trees reduce soil erosion? Describe one type of tree planting methods that prevent erosion.
Soil erosion is the process of breaking down materials by wind, water, or other natural agents, and the removal of material from Earth's surface to another location. As a result, trees protect the soil from the impact of rain by the intake of water and binding the soil together to prevent from soil eroding. Some types of planting methods pair planting, stream blank planting, and riparian strip. Pair planting This method is used to control gully erosion, for both permanent and ephemeral streams. Willows or poplars are planted about 2–3 metres apart on each side of the gully floor. In time their roots create a damming effect which slows the water flow, stabilises the gully sides, and allows other plants to regrow. Stream bank planting Willows are planted at the edge of streams and rivers to stem the erosion of the banks. Traps or small dams may also be used to catch material dislodged from the edge. Riparian strip This is a strip near a stream or river, which is fenced to exclude cattle. It may be planted with a mix of trees, shrubs and pasture. The aim is to trap sediment, and nitrogen and phosphorus in water run-off, from nearby slopes before it enters waterways.
What is a group of lines, or verse, forming the basic recurring metrical unit in a poem?