Claim · model-written summary
Reference crops derived as much as 90% of nitrogen from soil.
- Taxon
- wheat
Triticum aestivume1 - Outcome
- N from the soile0
- Value
- 90%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reference crops derived as much as 90% of their N from the soil”
e1“Discrepancies in the estimates from N-difference were correlated with differences in the amount of soil N taken up by the legume and the non-fixing wheat reference crop.”
Title
AM McNeill; CJ Pilbeam; HC Harris; et al. Australian Journal of Agricultural Research 1996. doi:10.1071/ar9961061
Other claims from this paper (14)
- Method / resource Isotope dilution estimated chickpea fixation at 32–82 kg N/ha.
- Method / resource Isotope dilution estimated lentil fixation at 18–82 kg N/ha.
- Method / resource N difference yielded lower and sometimes negative fixation estimates for both crops in the last two seasons.
- Method / resource N difference yielded a higher chickpea estimate in the first year.
- Association N difference discrepancies correlated with legume versus wheat soil nitrogen uptake differences.
- Observation Lentil and wheat had similar soil nitrogen uptake in the first year.
- Method / resource The two methods yielded similar first-year lentil fixation estimates.
- Observation Soil A-values differed significantly across fertilizer amounts.
- Method / resource A-value modification yielded lentil fixation estimates similar to classical isotope dilution.
- Intervention effect At 30 kg N/ha, fertilizer inhibited chickpea fixation and gave lower NID estimates than NAV.
- Recommendation Authors recommend lower fertilizer rates for isotope dilution studies of chickpea and lentil at ICARDA.
- Recommendation Authors suggest slow-release 15N isotope dilution as an alternative for fixation estimation.
- Recommendation Authors suggest natural abundance as another alternative for fixation estimation.
- Recommendation Authors highlight site soil nitrogen dynamics as necessary for selecting a fixation method.