Claim · model-written summary
At soil nitrate-supplying power of at least 50 p.p.m. N, added nitrogen gave little or no potato yield increase.
- Taxon
- potatoes
Solanum tuberosume0 - Treatment
- additional nitrogene0
- Outcome
- yielde0
- Direction
- little or no increasee0
- Qualifier
- 50 p.p.m. of N or moree0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soils having a nitrate-supplying power of 50 p.p.m. of N or more by the proposed modified method gave little or no increase in yield of wheat, oats, or potatoes when additional nitrogen was applied as fertilizer”
Title
D. J. Eagle; B. C. Matthews Canadian Journal of Soil Science 1958. doi:10.4141/cjss58-025
Other claims from this paper (8)
- Method / resource Original incubation results for Ontario soils were extremely variable.
- Method / resource Vermiculite placement and moistening produced satisfactory reproducibility.
- Method / resource Moist storage at 10 °C for two weeks reduced fluctuations due to air-dry storage or sampling time.
- Association Winter wheat yield decrement correlated with nitrate-supplying power at r = −0.437.
- Association Oat yield decrement correlated with nitrate-supplying power at r = −0.411.
- Association Potato yield decrement correlated with nitrate-supplying power at r = −0.651.
- Intervention effect At soil nitrate-supplying power of at least 50 p.p.m. N, added nitrogen gave little or no wheat yield increase.
- Intervention effect At soil nitrate-supplying power of at least 50 p.p.m. N, added nitrogen gave little or no oat yield increase.