Claim · model-written summary
The critical nutrient range for the soil variable tested was 45-65 mg/kg for oilseed rape responses.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Outcome
- critical nutrient rangee5
- Value
- 45-65 mg/kge5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e1“At 9 sites in the Mundulla area, where soils were primarily sandy loam over clay, oilseed rape yields were increased significantly by applied nitrogen at 7 sites”
e5“The critical nutrient range was 45-65 mg/kg”
Title
DC Lewis; TD Potter; SE Weckert; et al. Australian Journal of Experimental Agriculture 1987. doi:10.1071/ea9870713
Other claims from this paper (19)
- Intervention effect Applied nitrogen significantly increased oilseed rape yields at 7 of 9 sites in the Mundulla area.
- Intervention effect Applied phosphorus significantly increased oilseed rape yields at 2 sites in the Mundulla area.
- Intervention effect Applied nitrogen significantly increased oilseed rape yields at 5 of the 12 sites on heavy black clay and peat soils at Millicent.
- Intervention effect Applied phosphorus significantly increased oilseed rape yields at 6 sites on heavy black clay and peat soils at Millicent.
- Method / resource Anaerobic ammonium nitrogen measured in the top 10 cm best predicted seed yield responses to applied nitrogen among the measured soil variables.
- Association The response of oilseed rape to applied nitrogen was highly correlated with past paddock use.
- Association In the Mundulla area a significant nitrogen response was likely when oilseed rape followed 2 or more crops, the last a non-legume.
- Association In the Mundulla area a nitrogen response was unlikely when oilseed rape followed 1 or more years of pasture.
- Association At Millicent a nitrogen response was likely when oilseed rape was the sixth crop in a continuous cropping program.
- Association At Millicent a nitrogen response was unlikely when oilseed rape was the first or second crop in the rotation.
- Association The response of oilseed rape to applied phosphorus was highly correlated with extractable soil phosphorus measured in the top 10 cm.
- Observation The critical nutrient range was 20-25 mg/kg for sandy loam soils at Mundulla.
- Observation The critical nutrient range was 40-50 mg/kg for black clay and peat soils at Millicent.
- Intervention effect Nitrogen applications significantly increased seed oil content of oilseed rape at 6 sites.
- Intervention effect Nitrogen applications significantly decreased seed oil content of oilseed rape at 2 sites.
- Intervention effect Nitrogen applications had no effect on seed oil content of oilseed rape at 13 sites.
- Intervention effect Phosphorus significantly increased seed oil content of oilseed rape at only 1 site.
- Intervention effect Phosphorus significantly decreased seed oil content of oilseed rape at 3 sites.
- Intervention effect Phosphorus had no effect on seed oil content of oilseed rape at 17 sites.