give reasons for the following
Answers
Answer:
a) Flowing water picks up soil particles, and carries them along until the flow ebbs and the particles sink to the bottom. ... Anything that reduces the energy of the flow field can cause larger particles to drop below the critical Reynolds number and drop out of the fluid stream (deposition)
b)Topsoil is the primary resource for plants to grow and crops to thrive and the main two parameters for this are Carbon and Nitrogen. The Carbon provides energy and Nitrogen is a tissue builder and plants require them in a range of ratios to enable suitable growth.
c)These contour lines create a water break which reduces the formation of rills and gullies during times of heavy water run-off; which is a major cause of soil erosion. The water break also allows more time for the water to settle into the soil. ... Contour ploughing helps to reduce soil erosion
d) The major benefit, of course, is the conservation of soil and water. Terraces reduce both the amount and velocity of water moving across the soil surface, which greatly reduces soil erosion. Terracing thus permits more intensive cropping than would otherwise be possible.
e)Limestone is a sedimentary rock composed largely of mineral calcite. It often contain silica in the form of flint and varying amounts of clay and sand as layers in the rock. Limestone contains different amounts of silica, clay, silt and sand. The primary source of the calcite in limestone is most marine organisms.
Hope it will help you
Answer:
1.Flowing water picks up soil particles, and carries them along until the flow ebbs and the particles sink to the bottom. ... Anything that reduces the energy of the flow field can cause larger particles to drop below the critical Reynolds number and drop out of the fluid stream (deposition).
2.Topsoil is the primary resource for plants to grow and crops to thrive and the main two parameters for this are Carbon and Nitrogen. The Carbon provides energy and Nitrogen is a tissue builder and plants require them in a range of ratios to enable suitable growth.
3.These contour lines create a water break which reduces the formation of rills and gullies during times of heavy precipitation, allowing more time for the water to settle into the soil. ... Contour ploughing helps to reduce soil erosion.
4.The water has less resistance as it runs down the hill, so it can run faster and pick up more soil as it moves. This erosion carries vital nutrients and productive soil downhill, away from the farmland. Over many years, this sort of erosion can cause a slope to become infertile.
5.Limestone is a sedimentary rock composed largely of mineral calcite. It often contain silica in the form of flint and varying amounts of clay and sand as layers in the rock. Limestone contains different amounts of silica, clay, silt and sand. The primary source of the calcite in limestone is most marine organisms.
Explanation: