causes for development of a saline soil?
816638
Regular irrigation will often cause salts to rise to the surface.  To get rid of them it is necessary to flush out of the rooting zone occasionally by irrigating longer and deeper than usual.\n\nFertilizers also contain salts, the measurement of salt in the fertilizer is called the salt index.  I recommend using fertilizers with a salt index of less than 100.
602519
Salt or Sodium Chloride is highly soluble in water.  Salt is naturally occurring and large bodies of water that cover vast numbers of square kilometers come in contact with salt.  Over time it dissolves causing the water to be high in TDS or total dissolved solids such as NA CL.  When the water from oceans evaporates, the salt drops out of solution which increase the salinity of the remaining water.   The evaporated water returns to earth as fresh water which flows back into the oceans and the cycle continues.   Large Salt caverns are ancient spaces that have not been exposed to water for millions of years.
236344
The amount of salt makes a poor environment for the growth of bacteria.
522644
Alfisols, Aridisols, Entisols, Histosols, Inceptisols, Mollisols, Oxisols, Spodosols, Ultisols, Gelisols, Andisols, and Vertisols. \n\ngo here little one\nhttp://soils.ag.uidaho.edu/soilorders/orders.htm\n\nand here\nhttp://www.enchantedlearning.com/geology/soil/
563665
its the product of erosion....soil that has been eroded from rocks become sand in the sea...then when waves move they carry the sand to the shore...
758624
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
346958
Yes, soil moisture.\n\nBut how about the degree of ionicity of the soil; wouldnt that depend on the kinds of minerals in the soil (which is likely to vary as well)...\n\nCordially,\nJohn\nhttp://www.GodSci.org
825982
there are tons of factors affecting plant growth. one of them is the kind of soil for the plant to grow. some plants need a specific type of soil in order to grow properly. another factor is the sunlight and food it gets. it needs the propwer nourishment for the palnt to fluorish. next is the nutrients that a plant need. some may need medicines to help them grow better.
1148501
Silt & Clay is a Battle that can not be won.\nAs far as causes, agriculture and construction is currently eroding the surface of the earth 10000 times faster than nature can. This is causing an increase n the amount of silt and clay in rivers and bodies of water. The result will be an increase in the amount of shale and other sedimentary rocks in the earth furture.
159144
Rainfall makes the salinity of the bay decrease.  Since there is no salt in rain it makes sense that by adding water to salt water the salinity will decrease.
642291
http://natres.psu.ac.th/Link/SoilCongress/bdd/symp9/1375-t.pdf
980326
this was answered right here in Yahoo Answrs about 3 months ago:\n\n\n The river water keeps moving .This shows that there is no way of settlement of any minerals-this is the reason why the river wateris not salty.\n\n \nThe salinity of the ocean is caused by high mineral content. When water evaporates it leaves behind all of sediments and becomes pure water. When it falls as rain or snow it remains in this pure state. As it travel through rivers it picks up sediments. Most of the sediments remain in solid form and are pushed along by the river. However, salt dissolves into the water. When the water reaches the ocean, the salt deposit go as well. Over thousands and millions of years, the oceans have developed a high salt content. It's the same reason that lakes that have no outlet, such as the Great Salt Lake or the Dead Sea, become salty. \n\nAs a result of global warming, though, more fresh water is entering the ocean and its salinity levels are dropping. This can have significant environmental effects over time.
1117915
because the salt u use in the kitchen does not contain all the particals in the sea water like sodium sulphate magnesium sulphate etc because they are removed in the process  of making the salt and some times the salt it cut down from deep earth and they are also cleaned by removing the toxic particles and iodised which may alter the sea water salt from earth solt altho the main component of salt is Na Cl it has other particals such as iodine and k+ irons Fe ect...
505670
There are several ways in which salt and sugar inhibit microbial growth. The most notable is simple osmosis, or dehydration. The salt or sugar, whether in solid or aqueous form removes free water molecules in the food that is necessary for microbial survival and growth.\n\nThey may also inhibit enzymes activity directly or indirectly by helpng in the accumulation of antimicrobial produts from other organisms.
708919
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
145159
Salt?\n\nIodized salt?\n\nConstruction?\n\nDietary supplements?\n\nFluoridated tap water?\n\n@@@@@@@@@@@\n\n"Salt occurs naturally in many parts of the world as the mineral halite."
598714
If you get into folk stories and mythology you will see that almost every culture has a story explaining how the oceans became salty. The answer is really very simple. Salt in the ocean comes from rocks on land. Here's how it works:\n\nThe rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the rainwater to be slightly acidic due to carbonic acid (which forms from carbon dioxide and water). The rain erodes the rock and the acid breaks down the rocks and carries it along in a dissolved state as ions. The ions in the runoff are carried to the streams and rivers to the ocean. Many of the dissolved ions are used by organisms in the ocean and are removed from the water. Others are not used up and are left for long periods of time where their concentrations increase over time.\n\nThe two ions that are present most often in seawater are are chloride and sodium. These two make up over 90% of all dissolved ions in seawater. By the way, the concentration of salt in seawater (salinity) is about 35 parts per thousand. In other words, about 35 of 1,000 (3.5%) of the weight of seawater comes from the dissolved salts; in a cubic mile of seawater the weight of the salt, as sodium chloride, would be about 120 million tons. And, just so you don't think seawater is worthless, a cubic mile of it also can contain up to 25 tons of gold and up to 45 tons of silver! Before you go out and try alchemy on seawater, though, just think about how big a cubic mile is.\n\nBy some estimates, if the salt in the ocean could be removed and spread evenly over the Earth’s land surface it would form a layer more than 500 feet (166 m) thick, about the height of a 40-story office building.