There are several practices to reduce erosion depending on the land use:
By putting mystery snails and fighting fish in the same tank then waiting for them to breed. Once the eggs have hatched and you have several mystery fighting snails they will defend your mountain from the scourge of soil erosion.
contour plouging
vegetation would be one
Contour plowing is one way to reduce soil erosion. This method is also known for preventing tillage erosion. Preventing soil erosion helps reduce negative effects like flooding, reduced crop productivity, poor water quality and habitat destruction.
soil erosion is washing away of soil or carring away of soil from one place to another
Alluvial soil is the debris/talus from weathering/erosion of mountain rocks. If the mountain rock is granite, the alluvial is the breakdown components of it which are clay, silicon and mica sand. This so called alluvial soil will be deposited around foothills and perhaps further down if acted by river system. My take on this one : ....By the same token the mountain soil should be the "in situ" weathered/eroded mountain rocks which have not been transported away from the mountain yet.
soil erosion is one of soil related problem
Dry farming
There really is no special technology that will prevent soil erosion, rather modes of practice. No-till farming is one such practice that is designed to prevent or minimize soil erosion.
One of the main ways for dealing with soil erosion in Zimbabwe is through terrace farming. Terrace farming makes reduces the amount soil erosion when compared with farming on flat land.
Drought dries the soil. Soil gets powdery because it is so dry. Wind blows powdery soil away. This is only one form of erosion.
This process is called weathering.
Erosion
Erosion and deposition affect a mountain range by wearing down a mountain in one place, and then new landforms build up in other places.