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Nature and properties of soils
What is the importance of soil in agriculture
An essay on soil degradation
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Abstract: Our reality today, is confronting a colossal issue, the issue of soil disintegration. Not just is it an intense issue, it has likewise turned out to be generally spread that it requests our quick activity. Soil disintegration is created and influenced by a few variables; notwithstanding, it can be minimized by a few simple activities which one can actualize day by day. Introduction: Soil is a standout amongst the most vital layers of earth which is required for the continuation of life. It is of incredible significance to ranchers who invest the vast majority of their energy planting products and giving nourishment to humanity. One of the real issues undermining this common asset is soil disintegration.. What Is Soil …show more content…
At the point when soil disintegrates, the top layer is dislodged into its encompassing which as a rule is a stream or seepage. This prompts obstructing of watering system trenches furthermore dirties the water. Causes of Soil Erosion: There are a few key elements that add to the procedure of soil erosion. To begin with, people assume an unavoidable part during the time spent soil disintegration when they mishandle normal assets. Second, atmosphere elements are likewise key elements that enormously affect soil disintegration. These components can be isolated into those with an immediate impact, for example, wind speed and precipitation, and others with a backhanded impact, for example, temperature, water parity, and moistness. Qualities of soil additionally assume a crucial part in soil disintegration. Soil's hydrological, synthetic, physical, and mineralogical qualities are real supporters to soil disintegration. In addition, the landform in which the dirt exists likewise influences its inclination to dissolve. On the off chance that the dirt is found at a precarious slant inclination, it would be simpler for soil erosion to
Mississippi has a variety of different soils .The three general soils are 1) the river flood plain, known as the Delta, 2) a loess region, or bands of soils formed in windblown material that adjoins the Delta, and 3) Coastal Plain. The Mississippi Delta is better for growing row crop, while the loess and Coastal Plain region are better for animal production and forestry. The loess and Coastal Plain regions are divided based on similar soils, geology, climate, water resources, and land use called Major Land Resource Areas. The Mississippi Delta’s soil comes from sediments left by flooding various rivers in the region, rather than being a typical Delta formed by the mouth of a river. In the Delta most of the land is farmed, with three-fourths of the cropland to the north. Controlling surface water and drainage are major soil management issues. In the Delta soils are naturally diverse because of their alluvial origin. Particle sizes within the sediment decrease as distance from the originating stream increase. Another factor in Delta soil formation us surface water movement over time, because soils that formed under standing water have different properties than soils formed under moving water. Soils with large amounts of clay particles have unique features. When the soil is dry, small round aggregates form at the surface that look like shotgun buckshot, which is where the popular name for Delta clay soils “buckshot” came from. Soils with large clay content have very slow water filtration rates; this has led to significant aquaculture and rice production in the region. When floodwaters receded in the Delta, strong winds blew some of the dry sediment left by flooded river to the adjacent uplands to form the loess areas. Because of eas...
Removing vegetation removes the root systems, which help hold soil in place. Running water can now more easily wash soil and rock away, increasing erosion.
Take, for example, that livestock agriculture and the plant-based agriculture specifically used for feeding that livestock utilizes 30 percent of land on Earth. With crops in high demand to feed the many animals that are slaughtered or otherwise used by humans, it's been found that the soil has lost a great deal of its nutritional value and has eroded to the point that, in the United States, nearly 33 percent of topsoil is diminished.
In well-drained soils, organic material, which, of course, contains nitrogen, "may decompose faster than it is replenished (Dolman and Bud, 1967)" (Gambrell, et al, 321). So, in order to s...
Erosion often causes landforms such as cliffs, rocky platforms, headlands, caves, stacks and arches. (See Appendix B). When waves break, it carries material on and off the shore. When more material is carried in the backwash, the wave is destructive. This is the process of hydro-orientated erosion.
Soil liquefaction describes a phenomenon whereby a saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other sudden change in stress condition, causing it to behave like a liquid. The phenomenon is most often observed in saturated, loose (low density), sandy soils. This is because the loose sand has a tendency to compress when a load is applied; dense sands by contrast tend to expand in volume. If the soil is saturated by water, then water fills the gaps between soil grains. In response to the soil compressing, this water increases in pressure and attempts to flow out from the soil to zones of low pressure (usually upward towards the ground surface). However, if the loading is rapidly applied and large enough, or is repeated many times (e.g. earthquake shaking, storm wave loading) such that it does not flow out in time before the next cycle of load is applied, the water pressures may build to an extent where they exceed the contact stresses between the grains of soil that keep them in contact with each other. These contacts between grains are the means by which the weight from buildings and overlying soil layers are transferred from the ground surface to layers of soil or rock at greater depths. This loss of soil structure causes it to lose all of its strength. According to the
What did we learn throughout this lab? We learned that soil plays an integral role in not only agriculture (Miller and Spoolman, 211) but also our whole lives (Miller and Spoolman, 211). We learned how different environmental factors like moisture, slope, and location can impact how a soil forms or deforms. This information is incredibly useful for several reasons. As mentioned earlier in this report, studying soil is important because of how important soil is to humans. Scientists need a strong understanding how soil works and functions to make sure we don’t lose it. “There are no technological substitutes for fertile and uncontaminated topsoil.” (Miller and Spoolman, 211). Because of this, we need to make sure we don’t waste this precious and vitally important natural resource.
Singer, Michael J., and Donald N. Munns, 1996, Soils: An Introduction, Third Edition: Upper Saddle River, Prentice Hall, 480 p.
Soil deposited by flood waters prevents erosion and helps maintain the elevation of land masses above sea level. The rapidly receding land of the Mississippi River Delta is a direct result of man-made flood controls and levees that prevent topsoil-replenishing sediments from being deposited in the delta. Many population centers rely on ground water and underground aquifers for fresh water. Flood waters absorb into the ground and percolate down through the rock to recharge these underground aquifers, which supply natural springs, wells, rivers and lakes with fresh
Soil degradation is a serious global environmental problem and may be exacerbated by climate change. It encompasses physical, chemical and biological deterioration.
The GUESS model for soil erosion, which was developed by Rose et al. (1983) illustrated the processes of soil erosion, transportation and deposition along hillside. Therefore the model can be used to predict on- and off-site effects. Soil erosion at any position on the slope and at any time during the storm is related to a sediment flux. It depends on the sediment concentration and the hydrological conditions.
Saline soil is also vulnerable to erosion due to the death of vegetation that held the soil together. Soil that is eroded can ‘pollute’ water too.
Agriculture also leads to soil erosion, both through rainfall and wind. This soil can damage the aquatic ecosystems it ends up in, an...
Soil is the most important non-renewable resource on any farm. Healthy soil is key to a good
Agriculture increase and misuse is one of the central causes of desertification. Agricultural practices require the use and often the drying up of rivers. While water overuse is fundamental to the creation of drought conditions, the deforestation and soil erosion could be considered far more detrimental. To create agricultural surfaces, land must be cleared of existing vegetation. As roots bond soils and create micro bacterial gums, their loss has significant consequences for the soil strength (1).W...