Claim · model-written summary
Some DRIS indices depended so strongly on their own element concentration that ratio diagnosis offered little advantage over sufficiency-range diagnosis.
- Taxon
- sweet cherry and hazelnutt0
- Outcome
- ratio based diagnosis would have little advantagee0
- Comparator
- sufficiency range diagnosise0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValueQualifier
Verbatim
e0“Some indices are so dependent on the concentration of the element involved that a ratio based diagnosis would have little advantage over a sufficiency range diagnosis”
t0“sweet cherry and hazelnut”
Title
Diagnostic biases in DRIS evaluations on sweet cherry and hazelnut
Timothy L. Righetti; Othman Alkoshab; Kris Wilder Communications in Soil Science and Plant Analysis 1988. doi:10.1080/00103628809368025
Other claims from this paper (8)
- Method / resource One-equation DRIS indices had element-specific minimum or maximum limits.
- Method / resource The possible range of DRIS index values varied considerably among elements.
- Method / resource Using the unsigned sum of DRIS indices masked some relative deficiencies or excesses.
- Method / resource The two-equation procedure lessened but did not eliminate those diagnostic problems.
- Method / resource Relations between DRIS indices and concentrations differed across N, K, P, Ca, Mg, Mn, Fe, Cu, B and Zn regardless of calculation method.
- Method / resource Other DRIS indices depended on concentrations of other elements enough to be of little use for nutritional evaluation.
- Method / resource DRIS did not detect every deficiency or excess.
- Recommendation The authors recommended DRIS as a supplement to sufficiency-range interpretation when severe imbalances exist.