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Publikováno v:
Communications in Soil Science and Plant Analysis. 22:589-596
Nitrates were directly determined in sugar beet sap, extracted with 0.04 M Pb(CH3COO)2 ‐ 0.02 M PbO, using an ion‐selective electrode. Nitrate levels as low as 5 mg/kg of fresh plant weight could be accurately determined with a high degree of pre