By V.V. Snakin
The liquid part of soil (soil resolution) is a really skinny, penetrating and all-embracing water layer. It has the main huge floor one of the biosphere elements and interacts with these kinds of parts. offered during this paintings is a brand new complicated method built for soil liquid part research that's in accordance with in situ measurements. research of the soil liquid part could be of serious importance in environmental research.
This quantity sums up the tremendous event of the authors' study into soil liquid section composition in a number of ecosystems of significant and jap Europe. It describes the methodological fundamentals of soil liquid section study: tools of soil resolution extraction, the most difficulties of software of ion-selective electrodes for instant in situ evaluate of ionic job in soil liquid part and redox capability, and how you can conquer these difficulties. info are provided on soil liquid part composition in usual and agricultural ecosystems, their redox, pH, carbonate and different regimes in addition to the family among the composition of the soil liquid part and assorted ecological properties.
This paintings is dedicated to the pursuit of recent techniques to soil liquid part research with a target of getting to know the position of soil liquid part within the functioning of traditional and agricultural ecosystems in contemporary soil-formation, formation of basic organic creation, and in bio-geochemical turnover of parts. It contains new box research info in addition to all info generalization conducted via a unique complicated database (developed through the authors) on soil liquid section composition and different soil-ecological homes in quite a few ecosystems in vital and japanese Europe.
This publication is the 1st English version that integrally considers either methodological features and result of research of composition, formation, dynamics, spatial heterogeneity, and interrelations of soil liquid part with different parts of ecosystems. Soil scientists, agricultural chemists and ecologists will locate this identify of serious curiosity.
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Additional info for Soil Liquid Phase Composition
Eh measurements in situ are carried out in the same way as with ion-selective electrodes. Since the redox potential value is normally expressed in reference to the normal hydrogen electrode, it is necessary to add the reference electrode's potential adjusted to soil temperature according to Table 19 to the mean values of the electrode system. 5. COMPARISON OF DIFFERENT METHODS OF SOIL LIQUID PHASE INVESTIGATION 2 5 1 LABORATORY METHODS Fresh soil samples with natural moisture can be analyzed directly by ISE, or used for extraction of soil solution.
It is not suitable for saline soils. Na^ ions activity can be measured by means of glass electrodes of the ESL-51 type. But their sensitivity (lO'"^ mol/L) is not always sufficient for non-saline soils. In order to decrease H ions influence on the electrode, the pH value of soils should exceed the relevant pNa value by about 4. Cr ions activity could be measured by EM-Cl-01 electrode. These electrodes are sensitive and selective in most soils. But according to our experience, the drift of potential is significant in CI electrodes.
Table 14 provides clear evidence that it is necessary to take temperature into account when analyzing soil solution. 11 * 7 - calculated by the calibration curve at 20^C, 2 - calculated by the relevant equations, 3 - calculated by the calibration curve built at the temperature of the object of investigation Measurements of objects of various temperature or of temperature different from that of the standard calibration solutions equations 14, 16-18 may be used for ion-selective systems. In general, it is necessary to determine the C coefficient's value in equation 10 or 13 possessing the numeral value of the relevant isopotential point.