Mohammadi S.

Employment of chemical autography method based on ion-exchange membranes for estimation of content of extracted cations within field conditions

The executed work supposed estimation of movable cations content in soils within soil of undestroyed structure in field conditions by employment of cation and ion-exchange membranes of MK-40 and MA-ЭДТА types. It is discovered that when increasing humus content and cultivation state of soddy podzolic soils the share of positively charged calcium becomes lower. At Сa Ln+/Ca Ln- from 0,7 up to 0,003; Мg from 0.22 to 0,08. So, MA-ЭДТА type membrane in comparison with MK-H membrane absorbs more calcium than Mg, Fe in comparison with Mn and especially calcium in comparison with K.

Keywords: SOIL, MOVABLE CATIONS, ION-EXCHANGE MEMBRANES