Abstract
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
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