Claim · model-written summary
Supplemental nitrogen increased wheat yields by half, reaching 40–60% of yields under 90 kg N/ha.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- 45 kg N/hae0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- between 40 and 60%e0
- Comparator
- 90 kg N/hae0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplementing wheat with 45 kg N/ha increased yields by half, but only to between 40 and 60% of the yields with 90 kg N/ha.”
Title
Larry D. King American Journal of Alternative Agriculture 1994. doi:10.1017/s0889189300005920
Other claims from this paper (11)
- Intervention effect Soybean yield was unaffected by the studied management practices.
- Intervention effect No-till and conventional tillage produced equal continuous-corn yields in 1990 and 1992.
- Intervention effect No-till corn yielded 30% more than conventional tillage in 1991.
- Intervention effect Cultivated conventional-tillage corn yielded similarly to herbicide-treated no-till corn in the plentiful-rain year.
- Intervention effect In two of four dry years, no-till corn yields were higher than conventional tillage yields.
- Intervention effect Delaying clover plow-down increased clover biomass by 700 to 3500 kg/ha.
- Intervention effect Delayed plow-down significantly increased clover biomass nitrogen in two of five years.
- Observation Delayed clover plow-down affected corn yield in two of twelve comparisons.
- Intervention effect In the affected comparisons, delayed clover plow-down reduced corn yield by about 50%.
- Intervention effect Supplemental nitrogen increased corn yields to 62–84% of recommended-practice yields.
- Intervention effect Banded nicosulfuron increased corn yields to 62–84% of recommended-practice yields.