|
| << vorige |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 14 van 14 gevonden artikelen
| Titel: |
Verifying critical values from DRIS norms in sweet cherry and hazelnut |
| Auteur: |
Righetti, Timothy L. Alkoshab, Othman Wilder, Kris |
| Verschenen in: |
Communications in soil science and plant analysis |
| Paginering: | Jaargang 19 (1988) nr. 13 pagina's 1449-1466 |
| Jaar: |
1988-10 |
| Inhoud: |
Previously published DRIS norms for sweet cherry and hazelnut were used to calculate DRIS indices for N, K, P, Ca, Mg, Mn, Fe, Cu, B, and Zn on over a thousand leaf sample analyses for each crop. A nutritional imbalance index (NII) was obtained by adding the values of DRIS indices irrespective of sign. The sample with the lowest NII for each crop was assumed to have “ideal”; levels of elements and these “ideal”; levels were used to create an artificial data base to determine which critical values would be most consistent with DRIS evaluations. By maintaining all but one element concentration at “ideal”; levels and artificially varying another, the concentration of a given element that was associated with the onset of severe imbalances could be identified. In addition to providing ratio-based diagnoses, DRIS norms provide a means of independently evaluating current sufficiency ranges for elements that DRIS diagnoses as relatively deficient or excessive. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 14 van 14 gevonden artikelen
| << vorige |