Four-year dynamic of potassium on two sites interpreted by different soil tests
| Autor: | Domagoj Rastija, Krunoslav Karalić, Bojana Teodorović, Meri Engler, Brigita Popović, Zdenko Lončarić |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Regosol
Soil test Chemistry Soil organic matter Ammonium lactate Soil Science Soil classification engineering.material complex mixtures chemistry.chemical_compound Animal science Agronomy Soil pH potassium soil K-tests fertilizer recommendations medicine engineering Ammonium Fertilizer Agronomy and Crop Science medicine.drug |
| Popis: | Three soil–potassium (K) tests were compared using soil and plant samples collected during fertilization and liming experiments in Croatia on very acid dystric luvisol and slightly alkaline calcaric regosol. Soil samples were analyzed for pHKCl, pHH2O, organic matter, and ammonium lactate (AL, pH 3.75)–extracted phosphorus (P) and K. In addition, K was extracted with ammonium acetate (AA, pH 7) and with ammonium acetate ethylenediaminetetraacetic acid (AAEDTA, pH 4.6). In spring 2003, the dystric luvisol was limed with 0, 10, or 20 t ha‐1 carbocalk (by‐product at sugar beet processing, effective neutralizing value 69.1%). During the next four seasons, four different crops were grown without fertilization, with standard fertilization, and with doubled P amounts. All three soil K tests showed highly significant correlations of fertilization impact on extractable soil K and can be efficiently used for fertilizer recommendations. Balance calculation is closer to results of extractable K on fertilized plots th... |
| Databáze: | OpenAIRE |
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