Claim · model-written summary
Potassium was a limiting factor only for N and P together, not for N or P individually.
- Taxon
- Valencia orange
Citrus sinensise0 - Outcome
- limiting factore1
- Qualifier
- only to N and P together, but not to N or P individuallye1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Valencia orange trees”
e1“limiting factor only to N and P together, but not to N or P individually”
Title
Nitrogen, phosphorus, potassium interactions on valencia orange yields
Arthur Wallace Journal of Plant Nutrition 1990. doi:10.1080/01904169009364082
Other claims from this paper (11)
- Intervention effect Applied individually, N fertilizer gave a response of 6 per cent in Valencia orange.
- Intervention effect Applied individually, P fertilizer gave a response of 5 per cent in Valencia orange.
- Intervention effect Applied individually, K fertilizer gave a response of 23 per cent in Valencia orange.
- Intervention effect The total response to N, P and K applied simultaneously was 40 per cent, compared with 37 per cent predicted by sequential additivity and 34 per cent by simple addition.
- Intervention effect When N, P and K were applied together, the individual response to N was 8 in Valencia orange.
- Intervention effect When N, P and K were applied together, the individual response to P was 7 in Valencia orange.
- Intervention effect When N, P and K were applied together, the individual response to K was 26 in Valencia orange.
- Observation The interactions of K with P and of K with N were also sequentially additive.
- Intervention effect When N and P were applied together without K, a severe antagonism resulted, with a large yield decrease.
- Intervention effect Adding K to the N plus P treatment resulted in a 69 per cent yield increase.
- Recommendation The authors suggest an alternative procedure to DRIS analysis.