Washing away of humus from the soil surface
reducing of soil aeration by pressure
soil erosion by means other than rainfall
loss of organic matter due to exposure to direct sunlight
washing out chalk and limestone from upper layers of by heavy rains
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The selected answer is wrong:
leaching can be described as the washing away of the limestone and trioxocarbonates of the top soil by water or erosion.
Leaching in the context of soil science is **E. washing out chalk and limestone from upper layers by heavy rains**.
Leaching is the process by which water-soluble substances (such as calcium, fertilizers, or heavy metals) are washed out from soil or wastes. These leached out chemicals (called leachites) cause pollution of surface and sub-surface water. So, when heavy rains occur, it can wash out chalk and limestone from the upper layers of the soil. This process is known as leaching. Hence, the correct answer is E.
Leaching refers to the loss of water-soluble plant nutrients from the topsoil which consists mainly of humus, due to rain and irrigation.Option A is correct
Leaching is the loss or extraction of certain materials from a carrier into a liquid (usually, but not always a solvent). and may refer to: Leaching (agriculture), the loss of water-soluble plant nutrients from the soil; or applying a small amount of excess irrigation to avoid soil salinity.
humus cannot be leached as it is held in place in the soil. chalk and limestone can be leached according to wikipedia
The correct answer is:
E. Washing out chalk and limestone from upper layers by heavy rains.
Leaching is the process where water, typically from heavy rainfall, dissolves and removes soluble minerals like chalk, limestone, and nutrients from the upper layers of the soil, transporting them to lower layers or out of the soil profile. This can lead to nutrient depletion, making the soil less fertile.
Leaching of soil nutrients si mainly due to water A. floccu
lation
B. percolation C. erosion
D. capillarity
