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The standard for the determination of soil salinity is from an extract of a saturated paste of the soil, and the EC is then written as ECe. The extract is obtained by centrifugation. The salinity can more easily be measured, without centrifugation, in a 2:1 or 5:1 water:soil mixture (in terms of g water per g dry soil) than from a saturated paste.
One of the first studies made on soil salinity and plant response was published in the USDA Agriculture Handbook No. 60, 1954. [4] More than 20 years later Maas and Hoffman published the results of an extensive study on salt tolerance. [5] In 2001, a Canadian study provided a substantial amount of additional data. [6]
This may cause the following issues: rising water tables; increased storage of groundwater that may be used for irrigation, municipal, household, and drinking water by pumping from wells; waterlogging and drainage problems in villages, agricultural lands, and along roads - with mostly negative consequences. The increased level of the water ...
The environmental impact of agriculture can vary depending on the region as well as the type of agriculture production method that is being used. Listed below are some specific environmental issues in various different regions around the world. Hedgerow removal in the United Kingdom. Soil salinisation, especially in Australia. Phosphate mining ...
Soil salinity is the salt content in the soil; the process of increasing the salt content is known as salinization. [1] Salts occur naturally within soils and water. Salination can be caused by natural processes such as mineral weathering or by the gradual withdrawal of an ocean.
Dryland salinity is a natural process for soil, just like other processes such as wind erosion. Salinity degrades land by an increase in soil salt concentration in the environment, watercourse or soil in unirrigated landscapes, being in excess of normal soil salt concentrations in dryland regions.
The reason is that the deeper systems produce a more salty effluent than the shallow systems. Environmental criteria may then prohibit the use of the deeper systems. In some drainage projects, one may find that only main drainage systems are envisaged. The agricultural land is then still likely to suffer from field drainage problems.
Crop tolerance to seawater is the ability of an agricultural crop to withstand the high salinity induced by irrigation with seawater, or a mixture of fresh water and seawater. There are crops that can grow on seawater and demonstration farms have shown the feasibility. [ 1 ]