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Journal of Applied Sciences

Year: 2002 | Volume: 2 | Issue: 1 | Page No.: 1-9
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Authors

F.C. Oad

M.A. Samo

A. Soomro

D.L. Oad

N.L. Oad

A.G. Siyal

Keywords

The amount of salt-effected soil in Pakistan Varies in different places. In humid regions the salt problem is limited unlike arid and semi-arid areas. Salt accumulation and water logging mainly threaten Agriculture. Our country exports agriculture commodities, but its exporting quantity is going to be low day by day due to salt problem. It is economical to undertake salinity/sodicity in control limits in order to use that land for agricultural production as well as buildings could be safeguard from the hazard of salt and water logging. The soluble salt that occurs in the soils consists mainly of ions; sodium (Na+), calcium(Ca2+), magnesium(Mg2+), potassium(K+), chloride(Cl–) sulfate(SO42 ), bicarbonates(HCO3– ) and carbonates(CO32). As a result of chemical decomposition and physical weathering these constituents (salts) are generally released and exists on the soil surface or on the crop root zone. A high concentration of such salts interfere the growth of plants, reduces the crop production and land value. The control of this problem is prime important for maximizing and sustainable agriculture. The control of the salts can be through soil applied amendments like gypsum, acids, sulfur, HCl, pressmud, molasses and various field practices including plowing, irrigation, surface flushing, leaching and draining practices.
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