Rain Gardens — A is a shallow depression in the land which holds and collects running water from impervious surfaces and prevents erosion while saving the nutrients that inevitably get washed away. Good permeability is also required so that the contained flood water can be absorbed quickly. This method helps in slowing the water runoff and prevents soil from being washed away along the slope. An interesting possibility is to use tied ridging in connection with sprinkler irrigation to allow higher application rates at low pressure Stuart et al. In bench terracing a series of platforms are formed along the contour across the general slope of the plant. The additional depth of snow gave an increase of 100 mm of surface run-off.
. They are readymade manures and contain nitrogen, phosphorus and potassium. In ley farming grass is cultivated in rotation with regular crops. They are also known collo- quially as 'one-day soils' because they are difficult to cultivate when dry and hard, and also unworkable when saturated and sticky, but they do have a short window while drying out when the moisture is just right for cultiva- tion. Conserving soil helps to improve water quality and increases wildlife habitats while minimizing water and soil erosion. There is, therefore, an urgent need to conserve soil for the sake of prosperity of our masses.
Planting trees and terracing are two of the best ways to prevent soil erosion. A riparian zone is an interface between a waterbody and landmass. In broad base ridge terrace a canal is formed on the contour by exavating the mud. The weakness of this approach is that the main feature of rainfall in semi-arid regions is that it is very erratic and completely unpredic- table. All these schemes have, in varying proportions, the following objectives: i.
There are also links with the efficiency of water use discussed in Section 4. They suggest a practice called ley farming. The uptake of nutrients by plants also depends on the pH of soil. Rain gardens can prevent soil erosion and provides you with an opportunity to grow your own plants. This process promotes absorption of rain water in the soil and makes the soil more loose and fit to allow luxuriant growth of vegetation.
These practices can be used to prevent erosion and even restore damaged soil and encourage plant growth. In most schemes involving flooding of crops, it is usual to provide outlets for emergency overflow, and possibly for draining as well, because growing crops appear to be less affected when there is a slow continuous passage of water than if the water is stationary. Chemical fertilizers are made from inorganic materials and contain phosphorus, potassium and nitrogen. If a crop can be established during the early rains, the profile is usually near saturation only for short periods during the latter half of the season, water is more efficiently utilized, and there is less need for run-off collection and storage. Take a bus instead of … driving. If you grow non indigenous crops a recommended tip is to plant indigenous crops around them, in order to prevent soil erosion.
This has a negative effect on the metabolism of crops. A broad range of minerals can be used, including common substances such as and more exotic substances such as and. A characteristic surface feature is the development of an uneven surface with raised mounds and shallow depressions caused by repeated cycles of wetting and drying and known in Australia as 'gilgai'. In North America the culture of many Indian tribes has depended for centuries on simple methods of floodwater farming. Watering the soil along with the plants is a way to prevent soil erosion caused by wind. With a rainfall of 250 mm or more, low contour bunds only 0.
Another example of large-scale diversion of flood waters comes from the Yemen Arab Republic where the valleys discharge into the Tihama desert which bounds the Red Sea, using elaborate diversion structures as shown in Plate 5. A catchment ratio of at least 15:1 is usual and the tanks are designed to fill from rainfall of 75-100 mm, in an area where the annual rainfall is 165 mm with great variability. Using sprinklers and drip irrigation, the amount of water that is fed to the crops can be controlled. Schemes with internal catchments require high energy inputs for surface modification and so tend to be more common on crop land and in areas with annual rainfall of 250 mm or more. The depth of water stored varies from 0. Stream Bank Protection — During floods, stream banks can often cave in.
Conservation tillage thus can also conserve water and fertilizers. Two approaches are used to make more efficient use of the rain- fall. A disadvantage of contour bunds at intervals down the slope is that the crop tends to be uneven, reflecting the soil moisture profile in Figure 5. This contaminates the soil as well as the water, thus harming the health of all living organisms. · The most usual practice is for the bench terrace to be level along its length, but there have been a few trials with the terraces on a gentle gradient of 1:400 to encourage safe disposal of excessive run-off.
Some of the categories and ways to conserve the soil include: 1. Soil erosion by wind can be checked or reduced if the soil is covered by vegetation. Soil erosion for thousands of years was the greatest risk to the sustainability of human society. Prevent Overgrazing — Try not to let overgrazing happen by moving herds around often. Mixed cropping is the general rule. If it is narrow it is called narrow based ridge terrace.
In the Great Plains, researchers experimented with various implements that performed types of minimum tillage. This can be worsened when there is compaction of the furrow bottom by tractor traffic, and one must also consider whether the machinery and implements are as efficient as the reports would suggest. They also can be used to improve our environment, while providing a better diet and life to hungry people in developing countries of the world Avery, 2002. Owing to its unique structure, it prevents the rapid surface runoff of water. Biological Measures: The following are the biological methods which are helpful in checking the soil erosion: 1. The costs of land preparation can be expected to be recovered in about 10 years. One argument is that this would reduce the amount of damage by too much run-off or too much retention, but one could equally well argue that it will ensure that half of the land will always be under the wrong treatment.