what are the main soil contaminents?
398105
It depends where you live. In years past, and even today, areas along highways had high levels of lead in the soil due to the emissions from the vehicles on the road. Areas around nuclear facilities (particularly those with leaks!)are going to have more nuclear contamination. Along stream and riverbeds the soil will reflect whatever has been flowing by. Areas downwind from coal burning facilities have higher levels of acidity from sulfur mixing with rain to form acid rain. While each of these example is related to the activity of man, there are other contaminants that occur naturally, such as seepage from underground heavy metals and standing groundwater. Part of your answer will result from what you define as a contaminant. Salt is necessary for life, but salt levels that are allowed to build up will kill life (such as the area around the Dead Sea).
143612
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
428387
vigin soil that has not been fertilized
831727
Both are present in small amounts in soils and rocks.  Spillage from waste dumps can be a source also.
658192
Try these links:\n\nhttp://www.fao.org/ag/agl/agll/wrb/wrbmaps/htm/soilres.htm\n\nhttp://soils.usda.gov/use/worldsoils/mapindex/
304901
Most of what I found was James Doolittle's work.\n\nGround-Penetrating Radar Soil Suitability Map of the Conterminous United States\n\nJames Doolittle's work at USDA
128944
Environmental pollution is the release of environmental contaminants, generally resulting from human activity. Carbon monoxide, sulfur dioxide and nitrogen oxides produced by industry and motor vehicles are common air pollutants. Sunlight converts nitrogen oxides and hydrocarbons to ozone or smog. Water pollutants may consist of a wide range of organic and inorganic chemicals such as heavy metals, petrochemicals, chloroform, and bacteria. Water pollution may also occur in the form of thermal pollution and oxygen depletion. Soil contamination is an important aspect of environmental pollution; this phenomenon occurs when chemicals are released by spill or underground storage tank leakage. Among the most significant soil contaminants are hydrocarbons, heavy metals, MTBE, herbicides, pesticides and chlorinated hydrocarbons.
649102
/www.mapsofindia.com/maps/\nindia/soilsofindia.htm\n\nHere is the site your looking for
210536
well lets see: dead skin, dirt, little ity bity bugs(alive), little ity bity bugs (corpses), microscopic pieces of human, dog, cat dandruff, food particles, pet hair, fabric fibers, well that about sums it up...glad to help ya.\nLOL
265098
Soil is either topsoil or subsoil - both are horizontal.\n\nTopsoil is the 'living' soil that contains bacteria, nutrients etc and which enables plants to grow.  Usually about 600mm deep.\n\nSubsoil is the 'dead' soil that is deprived of nutrients etc.
72550
Human Activity\nMunicipal Wastewater and Solid waste\nLand Development\nMaterial Consumption
1037055
I'm not sure, but I'd imagine wet soil. The decomposers probably use the water to live and as means of digestion, seeing as water is an excellent solvent.
664304
Dirt is what gets tracked into the house on your shoes.  Soil is the provider of life on much of the Earth.  Soil is formed from weathered rock- I suppose humans could artificially do this, but not on a cost effective scale to, let's say, have a hundred thousand acre corn field.
124552
Soil absorbs moisture. It has small openings and the water gets in the small holes. The cohesion and adhesion of the water constitute a force that keeps the water in the soil, to a certain extent.
307411
E)  All of them.\n\nA)  Cows don't breathe it in, and it doesn't come from the water so it has to come from the diet.\nB)  Same as A\nC)  While it is true that phosphorous is in our soil, I would argue that the use of detergents and fertilizers are the major problems with phorphorous contaminating our lakes.\nD)  DNA is made of bases (nucleotides) attached by a "sugar phosphate backbone".  If bases are the rungs of a ladder, the sugars and phosphates make up the sides of the ladder.
225104
Lots of regular gravel and sand of different sized granuels. They use finer material thedeeper in the leech pit you go until you will eventually get clean water out the other side. (Hopefully)
336779
Carbon monoxide \nLead \nNitrogen dioxide \nOzone \nSulfur dioxide\nand also particles (eg dust).