How can irrigation contribute to soil degradation?
How can irrigation contribute to soil degradation?
All surface irrigation entails water flowing over soil. While irrigation is critical to global food production, applying water to soil can cause erosion. This is especially true with surface irrigation, where the soil conveys and distributes water through a field by gravity.
What are 3 causes of soil degradation?
Soil degradation causes include agricultural, industrial, and commercial pollution; loss of arable land due to urban expansion, overgrazing, and unsustainable agricultural practices; and long-term climatic changes.
What are five causes of soil degradation?
Various Causes of Soil Degradation
- Physical Factors.
- Biological Factors.
- Chemical Factors.
- Deforestation.
- Misuse or excess use of fertilizers.
- Industrial and Mining activities.
- Improper cultivation practices.
- Urbanization.
How does over irrigation affect land degradation?
Answer : Over-irrigation has a very negative effect on the environment and leads to land degradation. This is due to waterlogging. Due to over-irrigation in Punjab the alkalinity in soil increases which makes it infertile and makes the soil unsuitable for cultivation.
What are the effects of irrigation on the environment?
There are many positive impacts of irrigation on the environment. Among the negative impacts which appear in the mentioned spheres prevalent impacts is the danger of waterlogging and salinization of soils and waters, rise in groundwater table, spread of water born diseases, pollution of waters and many others.
How irrigation affect soil erosion?
The method of irrigation profoundly affects the vulnerability of the land to erosion. Because irrigated land is wetter, it is less able to absorb rainfall and runoff will therefore be higher. In general land-forming for irrigation, such as land-levelling and the construction of field bunds, tends to reduce erosion.
What are the types of soil degradation?
The type of soil degradation refers to the nature of the degradation process (displacement of soil material by water and wind; in-situ deterioration by physical, chemical and biological processes).
What are the causes of soil degradation Class 10?
Following are the important causes of soil erosion:
- Rainfall and Flooding. Higher intensity of rainstorm is the main cause of soil erosion.
- Agriculture. The farming practices are the major cause of soil erosion.
- Grazing.
- Logging and Mining.
- Construction.
- Rivers and Streams.
- Heavy Winds.
- Loss of Arable Land.
What are the two main reasons for soil degradation today?
Temperature and rainfall are the two main climatic factors responsible for soil formation. Write any two reasons for land degradation today? Solution : Two reasons for land degradation are deforestation and overuse of chemical fertilisers.
How does over irrigation and mining lead to land degradation?
Ans. i). Over irrigation is responsible for land degradation due to water logging which leads to increase in salinity and alkalinity in the soil. It retards the process of infiltration of water into the soil after it settles down on the land.
How irrigation method affects the environment?
What are two negative environmental effects of irrigation?
