Reclamation of sodic soils has traditionally been undertaken using calculation of gypsum or Ca requirement assuming 100% exchange efficiency and neglect of the contribution of calcium carbonate in the profile. The UNSATCHEM model is reviewed and then evaluated for its ability to predict field reclamation of a sodic saline soil. The 40-ha field site was initially at an electrical conductivity (E...

Gypsum is an excellent source of Ca and S, both of which are required for crop growth. Large amounts of by-product gypsum [Flue gas desulfurization gypsum-(FGDG)] are produced from coal combustion in the United States, but only 4% is used for agricultural purposes. The objective of this study was to evaluate the effects of (1) untreated, (2) short-term (4-year annual applications of gypsum tota...

Although barley (Hordeum vulgare L.) is regarded as salt tolerant among crop plants, its growth and plant development is severely affected by ionic and osmotic stresses in salt-affected soils. To elucidate the tolerance mechanism, growth and ion uptake of three barley cultivars, differing in salt tolerance, were examined under different levels of NaCl, K/Na and NaHCO3 in the root medium. The cu...

Asymbiotic and associative diazotropic bacteria such as Azotobacter and Azosprillum, respectively are widely distributed in different rhizospheric and nonrhizospheric soils and help in growth and development of plants. Sixty two soil samples were collected from different crop rotations namely Rice-Wheat, Vegetables, Agro forestry and Grassland from the districts Chandauli, Jaunpur,Ballia, Ghazi...

The application of phosphogypsum (PG) on sodic soils provides nutrients to the soil, reduces toxic effect Na+, and improves soil properties. Laboratory experiments were performed evaluate effects PG chemical properties soils. treatments arranged in a completely randomized design with five replications. included 0% GR (control), 50% (28.18 g·kg−1), 100% (56.37 150% (84.50 200% (112.74 g·kg−1) ra...

To assess the salt tolerance mechanism in aromatic plants, a soil pot experiment was conducted on Ocimum sanctum (shyama tulsi). The plants were raised on natural sodic soils having different levels of Exchangeable Sodium Percentage (ESP) i.e.,: 4.37 (control), 15.7 (low), 35.6 (medium) and 54.5 (high) ESP levels in complete randomized design. Results indicated that increased in ESP significant...