Soil salinity is one of the major environmental problems that affect the crop yield, soil health and consequently the socio-economic condition of the farming community. Monitoring the progressive development of soil salinity and assessment of its degree of severity is important to quantify its adverse effect on production and productivity and on environmental degradation. Presently, the monitoring of soil salinity [...]
This article provides a notes on the Gypsum Requirement (GR) of soil. The main principle for the reclamation of sodic or alkali soils is to replace exchangeable Na by another cation calcium (Ca2+). Of all calcium compounds, gypsum (CaSO4.2H2O) is considered the best and cheapest for the reclamation purpose. Calcium (Ca2+) solubilized from gypsum replaces sodium (Na+) leaving soluble sodium [...]
This article throws light upon the top three methods used for reclamation of saline and alkali soils. The methods are: 1. Eradication 2. Conversion 3. Other Methods (Salt Precipitation Theory). Method # 1. Eradication: The most common methods generally used to saline soils are: (i) Under drainage and (ii) Leaching or flushing. A combination of the two, flooding after tile [...]