How does Soil Erosion affect Agricultural Harvesting?
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The short answer is that soil erosion will tend to reduce harvests in areas where soil is lost and increase harvests where soil is deposited.\n\nIt isn't a coincidence that the earliest civilisations all grew up along rivers: The Nile, The Tigris, The Euphrates. All those rivers flood annually and deposit large amounts of highly fertile soil eroded from further upstream. That erosion allowed those river valleys to produce the largest agricultural harvests in the world.\n\nEven today much of our agriculture is dependent on soil erosion. We stll farm the banks of many major rivers such as the Misissipi and Amazon because the depisited soils make those areas highly fertile\n\nIn contrast the mountainous headwaters of those same rivers are highly unproductive because the soil gets washed away every year. As a result the soils are very thin and the land is totally unsuitable for plant agriculture.
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It could provide a steady flow of down stream water for crops and farming i.e. never flood and never a drought.\nFloods wipe out crops and crops can't grow without water
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It can be one or the other or both.\n\nFor example, farming may change a forest into land that is easily eroded. Climate changes include lots of rain either at the site or upstream Maybe a hot summer will melt more snow from a mountain..there are just a few examples.
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Wind and water erosion both erode top layes of the soil which is fertile.\nBoth can be controlled by planting trees over loose soil so that the roots can prevent soil erosion.\n\nBut water erosin is much more harmful since it can cut up land and make it unfit for cultivation, and water erosion can only take plaec where there is a slope.
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What causes erosion to be severe in some areas and minor elsewhere is a combination of many factors, including the amount and intensity of precipitation, the texture of the soil, the gradient of the slope, ground cover (from vegetation, rocks, etc.) and land use. The first factor, rain, is the agent for erosion, but the degree of erosion is governed by other factors.\n\nThe first three factors can remain fairly constant over time. In general, given the same kind of vegetative cover, you expect areas with high-intensity precipitation, sandy or silty soils and steep slopes to be the most erosive. Soils with a greater proportion of clay that receive less intense precipitation and are on gentle slopes tend to erode less. But here, the impact of atmospheric sodium on erodibility of clay should be considered.\n\nThe factor that is most subject to change is the amount and type of ground cover. When fires burn an area or when vegetation is removed as part of timber operations or building a house or a road, the susceptibility of the soil to erosion is greatly increased.\n\nRoads are especially likely to cause increased rates of erosion because, in addition to removing ground cover, they can significantly change drainage patterns. A road that has a lot of rock and one that is "hydrologically invisible" (that gets the water off the road as quickly as possible, mimicking natural drainage patterns) has the best chance of not causing increased erosion.\n\nUnderstandably, many human activities remove vegetation from an area, making the soil easily eroded. Logging and heavy grazing can reduce vegetation enough to increase erosion. Changes in the kind of vegetation in an area can also effect erosion rates. Different kinds of vegetation effect infiltration rates of rain into the soil. Forested areas have higher infiltration rates, so precipitation will result in less surface runoff, which erodes. Instead much of the water will go in subsurface flows, which are generally less erosive. Leaf litter and low shrubs are an important part of the high infiltration rates of forested systems, the removal of which can increase erosion rates. Leaf litter also shelters the soil from the impact of falling raindrops, which is a significant agent of erosion. Vegetation can also change the speed of surface runoff flows, so grasses and shrubs can also be instrumental in this aspect.\n\nOne of the main causes of erosive soil loss in the year 2006 is the result of slash and burn treatment of tropical forests. When the total ground surface is stripped of vegetation and then seared of all living organisms, the upper soils are vulnerable to both wind and water erosion. In a number of regions of the earth, entire sectors of a country have been rendered unproductive. For example, on the Madagascar high central plateau, comprising approximately ten percent of that country's land area, virtually the entire landscape is sterile of vegetation, with gully erosive furrows typically in excess of 50 meters deep and one kilometer wide. Shifting cultivation is a farming system which sometimes incorporates the slash and burn method in some regions of the world.\n\nWhen land is overused by animal activities (including humans), there can be mechanical erosion and also removal of vegetation leading to erosion. In the case of the animal kingdom, this effect would become material primarily with very large animal herds stampeding such as the Blue Wildebeest on the Serengeti plain. Even in this case there are broader material benefits to the ecosystem, such as continuing the survival of grasslands, that are indigenous to this region. This effect may be viewed as anomalous or a problem only when there is a significant imbalance or overpopulation of one species.\n\nIn the case of human use, the effects are also generally linked to overpopulation. For when large numbers of hikers use trails or extensive off road vehicle use occurs, erosive effects often follow, arising from v
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Sounds like you want your homework done by someone else..lol. Question is confusing.  15 effects of erosion, ok (you do the work, there)...what do you meant "its issue of this topic?"  the topic of environment? You're not clear. Look below for links.
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soil conservation is prevention of soil erosion...\nsoil erosion can b prevented by different ways... the most commonly used way spl in India is plantation... (planting of More trees ... through which the roots of the tree has a firmer grip on the soil and hence prevents erosion) the second way is  a type of trenching in the mountains.. like step cultivation ...\n\ni hav read these around 7-8 yrs back cant rembr all of it .. i hope u got the meaning wot u were looking for... \nhav fun wit ur project...
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Soil conservation refers to techniques used to prevent soil being lost or harmed by overuse, erosion, salinization etc.\n\nTechniques recommended by the U.S. Natural Resources Conservation Service include:\n\nwindbreaks \nterracing \ncover crops \ncontour plowing \n\nfor more details, visit http://en.wikipedia.org/wiki/Soil_conservation\n\nhttp://en.wikipedia.org/wiki/Water_conservation
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It depends on a lot of things. Among them, you should consider the amount of erosion, presence of water, wind, all those weathering factors that could impact the rate at which dirt (I'm guessing) accumulates.
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Dams and levees change the course of rivers.  Farmig, forestry, and suburban development lead to erosion.  Mining can change the forms of mountains.
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http://natres.psu.ac.th/Link/SoilCongress/bdd/symp9/1375-t.pdf
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Depends on the soil and what chemical process was used, but mostly plant nutrients. Very helpful website below.
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Holocene Soil Development on Till and Outwash Inferred from Lake-Sediment Geochemistry in Michigan and Wisconsin \nAuthors: Ewing H.A.1; Nater E.A.2\nSource: Quaternary Research, Volume 57, Number 2, March 2002, pp. 234-243(10)\n\nParent material. Few soils weather directly from the underlying rocks. These "residual" soils have the same general chemistry as the original rocks. More commonly, soils form in materials that have moved in from elsewhere. Materials may have moved many miles or only a few feet. Windblown "loess" is common in the Midwest. It buries "glacial till" in many areas. Glacial till is material ground up and moved by a glacier. The material in which soils form is called "parent material." In the lower part of the soils, these materials may be relatively unchanged from when they were deposited by moving water, ice, or wind.\n\nSediments along rivers have different textures, depending on whether the stream moves quickly or slowly. Fast-moving water leaves gravel, rocks, and sand. Slow-moving water and lakes leave fine textured material (clay and silt) when sediments in the water settle out.\n\nClimate. Soils vary, depending on the climate. Temperature and moisture amounts cause different patterns of weathering and leaching. Wind redistributes sand and other particles especially in arid regions. The amount, intensity, timing, and kind of precipitation influence soil formation. Seasonal and daily changes in temperature affect moisture effectiveness, biological activity, rates of chemical reactions, and kinds of vegetation.\n\nTopography. Slope and aspect affect the moisture and temperature of soil. Steep slopes facing the sun are warmer, just like the south-facing side of a house. Steep soils may be eroded and lose their topsoil as they form. Thus, they may be thinner than the more nearly level soils that receive deposits from areas upslope. Deeper, darker colored soils may be expected on the bottom land.\n\nBiological factors. Plants, animals, micro-organisms, and humans affect soil formation. Animals and micro-organisms mix soils and form burrows and pores. Plant roots open channels in the soils. Different types of roots have different effects on soils. Grass roots are "fibrous" near the soil surface and easily decompose, adding organic matter. Taproots open pathways through dense layers. Micro-organisms affect chemical exchanges between roots and soil. Humans can mix the soil so extensively that the soil material is again considered parent material.\n\nThe native vegetation depends on climate, topography, and biological factors plus many soil factors such as soil density, depth, chemistry, temperature, and moisture. Leaves from plants fall to the surface and decompose on the soil. Organisms decompose these leaves and mix them with the upper part of the soil. Trees and shrubs have large roots that may grow to considerable depths.\n\nTime. Time for all these factors to interact with the soil is also a factor. Over time, soils exhibit features that reflect the other forming factors. Soil formation processes are continuous. Recently deposited material, such as the deposition from a flood, exhibits no features from soil development activities. The previous soil surface and underlying horizons become buried. The time clock resets for these soils. Terraces above the active floodplain, while genetically similar to the floodplain, are older land surfaces and exhibit more development features.\n\nThese soil forming factors continue to affect soils even on "stable" landscapes. Materials are deposited on their surface, and materials are blown or washed away from the surface. Additions, removals, and alterations are slow or rapid, depending on climate, landscape position, and biological activity.\n\nWhen mapping soils, a soil scientist looks for areas with similar soil-forming factors to find similar soils. The colors, texture, structure, and other properties are d
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Are you actually asking what farming techniques have changed since people were digging in the ground with stones to today's modern methods?  \n\nThis is the subject of an entire book, not something that can be answered on Yahoo Answers!\n\nYou can go to www.wikipedia.org and type in "farming", that's about as much help as I can give you without quitting my job and doing this full-time!
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They are well known scavengers that we follow the farmers plough to pick off titbits (worms, etc) that are exposed when the soil is tilled. Not to mention, at the landfill sites for household waste.
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Soil is produced from the erosion of rocks. All the soil in Washington was produced by eorosion. So erosion helps people by enabling them to grow food to eat.
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It uses up all of the "nutrients" or whatever in the soil.  Crop rotation and planting things like legumes were done to allow the land to recharge between planting cycles.