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EUF method

EUF method (GB)

Laboratory analysis method (electro-ultrafiltration) for the investigation of soil substrates for those available for plants nutrient, It can contain all of the main nutrients and trace elements including nitrogen (in the form of ammonium and nitrate, as well as organically bound nitrogen). Soil samples are taken from 0 to 60 centimeters before the start of vegetation (February to March) soil taken. The subsequent chemical determination of the water-soluble elements and compounds, as well as their concentration, is carried out with conventional analysis from the extraction solution (atomic spectroscopy or spectrophotometry). The extraction of the nutrients is carried out in a unit specially developed for this process using heating and electricity. In a first step (fraction), the directly available at 30 ° Celsius, 200 volts and 15 milliamps, and in a second step the potentially available nutrient content (stock) at 80 ° Celsius, 400 volts and 150 milliamps is determined. Depending on the nutrient, the two results are presented either individually, as a sum or in relation to each other. The analysis serves as the basis for a necessary one fertilization, See also under Bonitur and Nmin method,

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