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All of them.
Topsoil is absolutely necessary to grow any plant, unless you wanna get into hydroponics (growing some plants such as tomatoes in water only).
This is what Wikipedia says about topsoil:
Topsoil is the upper, outermost layer of soil, usually the top 2 inches (5.1 cm) to 8 inches (20 cm). It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs.
Plants generally concentrate their roots in and obtain most of their nutrients from this layer. The actual depth of the topsoil layer can be measured as the depth from the surface to the first densely packed soil layer known as subsoil.
A major environmental concern known as topsoil erosion occurs when the topsoil layer is blown or washed away. Without topsoil, little plant life is possible. It takes approximately 100 years for 1 inch (2.5 cm) of topsoil to be deposited, if there is the correct ratio of organic material, inorganic material, and moisture. This can be improved by using the terra preta system. However, there are 25 billion tons of topsoil lost each year.
What else can I help you with?
What are examples of cement?
rocks that have been eroded and sand you see on the ground.
How long does it take to replace eroded top soil?
Well really depends on your anabatic lapse rates because that is directly relevant to the erosion of topsoil and the density of which is eroded at, also if the Cation exchange capacity is greater than the pH of the soil the effect of aeolian processes is greatly maximised. Hope this helps :)
Would you expect to find much topsoil on the top of a mountain?
No. The weathering process and snow accumulation would take most of the eroded rock pieces (soil) farther down the mountain. "Topsoil" is formed from accumulated dead plant material, and there are fewer plants that grow on top of mountains compared to valleys and plains.
What is one disatvantage of silt?
One disadvantage of silt is that it can easily be eroded and washed away by water, leading to soil erosion and loss of fertile topsoil. This can impact plant growth and agriculture in the affected area.
What is one natural resource that can be easily eroded and may take hundreds of years to form?
Topsoil is a natural resource that can be easily eroded, and it can take hundreds of years to form through the decomposition of rocks and organic matter. Erosion can disrupt this delicate balance, leading to loss of fertile soil for agriculture and ecosystem health.
What kind of soil is not easily eroded by water?
Clay soil is not easily eroded by water due to its fine particles and high water-holding capacity. Its structure helps to resist erosion even during heavy rainfall or runoff events. Implementing proper land management practices can further enhance the soil's erosion resistance.
What are some Examples of a meander?
a meander is a sharp turn in a river. also the meander would of been eroded to make a sharp curve :)
What can eroded soil enter causing them to fill up with sediment?
Eroded soil can enter water bodies such as rivers, lakes, and streams, where they accumulate and cause sedimentation. This can lead to decreased water quality, habitat degradation, and reduced water flow capacity.
How might the conditions that caused the 1930 Dust Bowl disaster have been avoided?
When dry weather blanketed the plains in the 1930s, the wind eroded unprotected topsoil, reducing farmlands across several U.S. states to a barren wasteland called the Dust Bowl.
Can soil be eroded when trees are removed from an area?
Yes, the roots of trees help bind soil together, preventing erosion. When trees are removed, the soil becomes more susceptible to erosion by wind and water. This can lead to loss of topsoil and decreased soil fertility.
How might the condition the caused the 1930 dust bowl disaster have been avoided?
When dry weather blanketed the plains in the 1930s, the wind eroded unprotected topsoil, reducing farmlands across several U.S. states to a barren wasteland called the Dust Bowl.
What type of rock forms from layering of eroded rock?
Sedimentary rock forms from the layering of eroded rock material, which accumulates and undergoes compaction and cementation over time. Examples of sedimentary rocks include sandstone, shale, and limestone.
