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Estimation of element content in soil by a unit of its specific surface and density of surface charge



Estimation of element content in soil by a unit of its specific surface and density of surface charge



Izvestiya Timiryazevskoi Sel'skokhozyaistvennoi Akademii (2): 72-77



The amount of elements in the soil may be estimated by a unit of specific surface, a charge unit of acidoid and basoid of soil absorbing complex, a unit of density of a surface charge. The charge density should be calculated as ratio of a capacity of the absorption of cations and anions to the value of specific surface. Best results are obtained by calculating the charge density and the charge value for each qualitatively different sorption site. Finding certain types of sorption sites may be done by exchange isotherms, pKa values determined by potentiometric titration. The results obtained by the suggested way of expressing the capacity factor correlated well with fractional composition, kinetics factor, strength of connection of K, P, Fe and humus. The value of ch4rge density made 2.3-5.8 .cntdot. 10-3 meq/m2.

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Accession: 005387300

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