Claim · model-written summary
The potato yield difference between urea and ammonium sulphate was larger at 80–120 lb./acre.
- Taxon
- potatoes
Solanum tuberosumt0 - Treatment
- ureat0
- Outcome
- yield of tuberse1
- Direction
- larger differencee0
- Value
- 80–120 lb./acree0
- Comparator
- ammonium sulphatee1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with a larger difference at 80–120 lb./acre.”
t0“urea as a fertilizer for barley, sugar beet, potatoes, winter wheat and grassland”
e1“urea gave slightly smaller mean increases in yield of tubers than those from ammonium sulphate when applied at 40–60 lb./acre of nitrogen”
Title
J. R. Devine; M. R. J. Holmes The Journal of Agricultural Science 1963. doi:10.1017/s0021859600018116
Other claims from this paper (7)
- Intervention effect Urea and ammonium nitrate gave similar barley grain yield increases on acid soils.
- Intervention effect Urea gave smaller barley grain yield increases than ammonium nitrate on alkaline soils.
- Association The relative barley fertilizer effect was similar across soil texture and regions.
- Intervention effect Urea and ammonium nitrate gave indistinguishable sugar beet sugar and tops yields.
- Intervention effect Urea gave slightly smaller potato tuber yield increases than ammonium sulphate at 40–60 lb./acre.
- Association Potato fertilizer response showed no detected influence of soil pH, texture, region or application method.
- Intervention effect Urea and ammonium nitrate gave similar winter wheat grain yield increases.