Abstract
Abstract A field experiment was conducted in a sodic soil (Typic Halaquepts) of Kanpur, India, to explore possibilities of utilizing coal fly ash for the purpose of reclamation. Effectiveness of coal fly ash applied at the rate of 10 and 20 Mg ha‐1 on changes in physicochemical properties of soil and its ultimate effect on the yields of rice IR‐8 and wheat Sonalika grown in a sequence were evaluated. Changes in soil pH, electrical conductivity, Na saturation % of exchange complex, hydraulic conductivity, bulk density, stability index, and moisture retention characteristics were monitored after harvest of each crop. Results indicated that coal fly ash was effective for improving physicochemical properties of sodic soil, which in turn resulted in significant increase of yields for rice and wheat. Application of fly ash at the rate of 10 and 20 Mg ha‐1 improved paddy rice yields from 1.02 (control) to 2.85 and 3.38 Mg ha‐1 during 1979, and from 1.98 to 4.03 and 4.65 Mg ha‐1 during 1980, respectively. Similar...
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