Claim · model-written summary
High nitrogen greatly raised kale leaf nitrogen percentage.
- Taxon
- kale
Brassica oleracea var. viridise0 - Organ / stage
- leafe0
- Treatment
- high nitrogene0
- Outcome
- leaf nitrogen percentagee0
- Direction
- greatly increasede0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf nitrogen percentage of kale and sugar beet was greatly increased by high nitrogen”
Title
A comparison of competitive effects of some common weed species
P. J. WELBANK Annals of Applied Biology 1963. doi:10.1111/j.1744-7348.1963.tb03679.x
Other claims from this paper (18)
- Observation Sinapis arvensis was the most competitive weed with kale.
- Observation Polygonum convolvulus and Alopecurus myosuroides ranked next with kale.
- Observation Polygonum convolvulus was less competitive with wheat than Alopecurus.
- Intervention effect Nitrogen had a significant effect on kale.
- Intervention effect Nitrogen had a significant effect on sugar beet.
- Intervention effect Nitrogen affected wheat significantly in only one experiment.
- Intervention effect High nitrogen generally did not significantly lessen weed effects.
- Intervention effect High nitrogen increased effects of Sinapis on kale.
- Intervention effect High nitrogen increased effects of Chenopodium on wheat.
- Intervention effect High nitrogen greatly raised sugar beet leaf nitrogen percentage.
- Observation Weeds usually affected crop leaf nitrogen percentage only slightly.
- Intervention effect In two wheat experiments, high soil nitrogen increased leaf nitrogen percentage with weeds present.
- Intervention effect In those wheat experiments, high nitrogen had little effect on leaf dry weight.
- Observation Alopecurus appeared to compete with wheat for nitrogen in a third experiment.
- Observation Sinapis appeared to compete with wheat for nitrogen in a third experiment.
- Intervention effect Adding a crop indicator usually reduced weed yields.
- Association The most competitive weeds were least affected by the crop indicator.
- Method / resource The pot method was judged to approximate field results and have advantages over alternatives.