Claim · model-written summary
Added nitrogen increased seed yield in the hot dry 1947 season.
- Taxon
- Soybeans
Glycine maxt0 - Treatment
- added nitrogene1
- Outcome
- seed yieldse2
- Direction
- increasese2
- Setting
- hot dry growing seasone1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“of Soybeans”
e1“In 1947, during a hot dry growing season marked responses were obtained from added nitrogen”
e2“The number of nodules per plant decreased 80 to 90%, there were appreciable increases in seed yields, nitrogen content of the seed increased, and oil content decreased”
Title
J. C. Lyons; E. B. Earley Soil Science Society of America Journal 1952. doi:10.2136/sssaj1952.03615995001600030008x
Other claims from this paper (10)
- Intervention effect Added nitrogen decreased the number of nodules per plant by 80 to 90% in the hot dry 1947 season.
- Intervention effect Added nitrogen increased seed nitrogen content in the hot dry 1947 season.
- Intervention effect Added nitrogen decreased seed oil content in the hot dry 1947 season.
- Observation In 1949, with adequate rainfall and moderate temperatures, soybeans showed little to no response to added nitrogen.
- Observation Nodule number per plant on untreated plots was larger in 1949 than in 1947.
- Intervention effect The largest ammonium nitrate application decreased nodule number by only 35%.
- Intervention effect Added nitrogen increased seed yield very little in the 1949 trial.
- Intervention effect Added nitrogen caused no change in seed nitrogen and oil contents in 1949.
- Intervention effect Plow-down applications were the most effective utilization of applied nitrogen compared with side-dressing.
- Mechanism Rainfall and temperature during the growing season are apparently a direct influence on the sufficiency of symbiotically fixed nitrogen for maximum soybean yields.