A COMPARATIVE STUDY BETWEEN ELECTROULTRA FILTERATION AND SOME CONVENTIONAL EXTRACTION PROCEDURES OF SOIL-K ON SOME SOILS OF EGYPT | ||
| Egyptian Journal of Agricultural Research | ||
| Article 3, Volume 78, Issue 2, July 2000, Pages 529-544 PDF (4.09 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2000.321961 | ||
| Authors | ||
| MOHAMED A. EL-AKABAWY1; FAUZA M. MORSI2 | ||
| 1Soils, water and Environment Research Institute, Agricultural Research Center, Giza, Egypt | ||
| 2Central Laboratory of Design and Statistical Analysis. Agricultural Research Center, Giza, Egypt | ||
| Abstract | ||
| Nineteen cultivated soil samples representing alluvial and nonalluvial soils differing in clay and K content, were tested for K using the most conventional K-extraction procedures, namely: water soluble-K, ammonium acetate, nitric acid and 0/1 measurements. The results were compared and stati:,tically correlated with the EUF-K parameters de-sorbed from the soil samples. The relative yield of the actually uptake-K from those soils by clover plants in a pot experiment was measured, as a biological index, to evaluate the validity of both the EUF and the other methods in describing K status. The EUF-K parameters showed correlation with the most important conventional K extraction methods. The biological test revealed that EUF-K parametrs are highly effective in describing soil•K status, comparing with the other used methods. The results ascertained the suitability of the EUF method in order to easily characterizing the K availability status, providing information on K mobility that cannot be obtained by the "static' conventional methods and for saving time and reagents. | ||
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