تلخیص
Soil Samples from surface horizons of six barren saline-sodic and four cultivated soils were used to determine the magnitude of negative and positive charges by the adsorption ofK* and Ch. The permanent charges were estimated by difference of total negative and positive charges; variable charges by Ch adsorption and zero point of charge (ZPC) by the salt litration method. The negative and positive charges varied from 7.38 to 8.92 and 3.00 to 4.00 c mol (+) kg-' for normal soils while from 3.79 to 6.72 to 4.8 c mol (■*-) kg ■ for salt-affected soils, respectively. The ZPC values (pH values) ranged from 6.53 to 7.29 for normal and from 7.22 to 7.49 for salt-affected soils. At ZPC, the permanent and variable charges varied from 3.94 to 5.0 and 2.80 to 3.24 c mol (+) kg' for normal and from J.JO to 6.50 and 1.40 to 3.50 c mol (-<-) kg- for salt-affected soils, respectivel
Abdul Ghafoor, , Abdul Razzaq , Rashid Ahmad* . (1994) CHARGE CHARACTERISTICS AND ZPC OF SOME ALKALINE CALCAREOUS SOILS FROM FAISALABAD DISTRICT, The Journal Soil & Environment , Volume 9, Issue (1-2).
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