Earth Consumption |Land Degradation
Without human activity, the possibility of soil loss through tension will be balanced by potentially new soil in most areas. Soils on a virgin soil are protected by a finger of the plants. When rain level or tree leaves are rained before some of the moisture dry down before reaching the ground.
The trees and grass are served as air bases, and the roots of the rope can help the soil against the action of both the rain and the air. Housing, industrial development, and highway construction, partially or fully-equipped vegetable terrain and to stabilize the tension of some kind of soil as well as agriculture and wood. Increasing excavation, compared to crops such as corn and tobacco, agriculture is lesser with crops such as wheat.
Maximum, which can change grass fields for time and unemployment cultivation has had a devastating impact in some parts of the United States. Some practitioners believe that the tension of soil is complicated due to changes in different population and some civilizations. Vegetables of cities and cities have been found in dry areas, such as the care of Masusepemia, indicates that agriculture was once again in the surrounding area.
Causes of Land Degradation:
To maintain the development of the plant, the artificial irrigation of the earth is processed in all parts of the world, where the rain does not provide adequate moisture to the ground. In dry areas, such as the South-West United States, Irrigation is used during dry minerals, to ensure crops and to increase crop production. Irrigation has increased the amount of land and food production worldwide.
In 1800, about 8.1 million hectares (approximately 20 million acres) were under irrigation, a figure increased 41 million hectares (99 million acres) in 1900, 105 million hectares (260 million acres) in 1950 and more than 222 Up to one million hectares (550 million acres) today.
Under irrigation, plant represents almost 15 percent of all land, but production of non-toxic fields often generates more twice a day. However, irrigation, soil water, or can destroy. This problem is now one-third of the world’s irrigation land.
The main problem due to continuous Irrigation is that salt adds to the upper layers of prevention or prevention of soil and the development of plants. Almost all irrigation water, whatever it means, contains some salt, which is spread over a water table and makes it fast breaks.
Where the water drainage is bad and the water table reaches the root level, the development of concentrated salt plant impossible. Therefore, the good drainage system, which keeps the water table well from the surface of the root, and allows the salt to dissolve through the water level, now it is considered an important aspect of an irrigation system.
Due to the extraordinary dry soil, the rising flame began to destroy the rich land of the South Dragris-Eritrea valley of Massopimia as 2100 BC 2100 BC. From these lands 1700 BC, one of his production reached a quarter of a large quantity, and great seminars were dependent on them. Pakistan’s largest irrigation project has the same problem, a 15-year-old land-affected land in Sindh. Measures have been taken to reduce the water tables through ground tables and allow water to dissolve the soil through the topsoil.
After the completion of the Aswan High Dam in 1960, the Egyptian government has spent more money to prevent salt from the fields of Nile Valley. During the last ten years, Nile floods fired the land with flood-flooded annual floods, a process which should now be done by constructing an artificial drainage system.
Some formulas in California’s rich imperialism and cousin Valley have no less serious problems, which have affected the failures of crop mass due to the increased salt content of the Colorado River’s water.
Although in the third quarter of the 20th century, the world’s irrigation area has increased by 3%; its rate will be 1% in the last quarter, largely because exploited mostly due to the potential for irrigation development.
Apart from this, more demand is being made on limited water resources, effective utilization of available surface and groundwater water is becoming important. Therefore, the irrigation, which is used to be a farmer to water, is highly technical; collectively collect extensive information about the water resources, soil quality, and the condition of the water table. Is calling to It’s a job below that is often out of private farming resources. An important source of research is to prepare techniques to save the land which is already under irrigation.