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The methodology proposes criteria for determination of the content of micro-nutrients in soils and their evaluation via useing of the extraction method Mehlich 3: certified methodology for practice
Čermák, Pavel ; Mühlbachová, Gabriela ; Káš, Martin ; Vavera, Radek ; Pechová, Miroslava
The methodology proposes criteria for determination of the content of micro-nutrients in soils and their evaluation via useing of the extraction method Mehlich 3. Extraction procedure Mehlich 3 is the official analytical method currently used in testing system of agricultural soils for the determination of the content of available P, K, Mg and Ca. There are criteria for valuation of content of these available nutrients - see Decree No. 275/1998 Coll., on Agrochemical Testing of Agricultural Soil and Land Surveys of Forest Lands, as amended). The existing criteria for above mentioned nutrients are due to this methodology extended by next five elements (Cu, Fe, Mn, Zn and B), marked in field of plant nutrition as micro-nutrients. The simple and easy Mehlich 3 analytical procedure applicable to a variety of different elements, is already used in a wide range of laboratories, allows to extend the criteria for the others elements. In addition, many laboratories can use the multi-elementar analytical instruments ICP-OES. Suggested criteria will also serve for farmers for valuation of soil supply by micro-elements.
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