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Details van artikel 13 van 17 gevonden artikelen
| Titel: |
Soil extractants used in Estonia and Finland, their extraction power, and suitability for testing Estonian soils |
| Auteur: |
Kewai, L. Kewai, T. Sippola, J. |
| Verschenen in: |
Communications in soil science and plant analysis |
| Paginering: | Jaargang 28 (1997) nr. 3-5 pagina's 197-203 |
| Jaar: |
1997-02 |
| Inhoud: |
The present work was undertaken to obtain information on the effectiveness of extractants used for soil testing in Estonia and in Finland and to evaluate the suitability of the Finnish methods for use with Estonian soils. The sample material involved 86 soils and winter wheat (Triticum aestxvum L.) shoots collected from farmers' fields in Estonia. The extractants used in Estonia were double lactate (DL) for phosphorus (P) and potassium (K), ammonium lactate (AL) for calcium (Ca) and magnesium (Mg), 1N HCl for copper (Cu), manganese (Mn), and zinc (Zn), ammonium oxalate (AO) for molybdenum (Mo) and 1N HNO3 for cadmium (Cd) and lead (Pb). In Finland, acid ammonium acetate (AAAc) was used for P, K, Ca, and Mg determination, and acid ammonium acetate-EDTA (AAAc-EDTA) for Cu, Mn, Mo, Zn, Cd, and Pb. The order of magnitude of extractable concentrations for these elements was: PDL > PAAAc, KDL < KAAAc, CaAL < CaAAAc, MgAL> MgAAAc, CuHCl > CuAAAc-EDTA, MnHCl, > MnAAc-EDTA, ZnHCl < ZnAAAc-EDTA, MoAO > MoAAAc-EDTA, CdHNO3 > CdAAAc-EDTA, and PbHNO3 > PbAAAc-EDTA. Correlations between results of respective methods for determining macronutrients were high (r ≥ 0.9). In the case of Cu, Mn, Mo, Zn, Cd, and Pb r values ranged from 0.5 to 0.8 due to difficulties in determining low concentrations. A statistically significant correlation between concentrations of elements in soil and in wheat shoots only existed for few elements. The DL extractable P and K correlated better than those for the AAAc method, and coefficients for the DL method were 0.29 and 0.31, respectively. This indicates that the DL method is better suited to Estonian soils than the AAAc method. In the case of Cu, Mn, Mo, and Zn, no method preference was found. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 13 van 17 gevonden artikelen
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