Claim · model-written summary
Doubles increased corn yield at all populations.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- doublese0
- Outcome
- yielde0
- Direction
- increasee0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The net effect of doubles was an increase in yield at all populations”
t0“Corn”
Title
Effects of Missing and Two‐Plant Hills on Corn Grain Yield
Emerson D. Nafziger jpa 1996. doi:10.2134/jpa1996.0238
Other claims from this paper (17)
- Intervention effect Increasing corn density from 18 000 to 30 000 plants/acre reduced grain yield per plant from 8.40 to 6.32 oz/plant.
- Intervention effect Increasing corn density from 18 000 to 30 000 plants/acre raised area yield from 169 to 211 bu/acre.
- Intervention effect Each corn plant in a double yielded 10 to 17% less than uniformly spaced plants.
- Intervention effect At the lowest population, two plants in a double yielded 81% more than controls.
- Intervention effect At the highest population, two plants in a double yielded 67% more than controls.
- Intervention effect Plants next to doubles yielded 2% less than controls at the lowest population.
- Intervention effect Plants next to doubles yielded 12% less than controls at the highest population.
- Observation Plants adjacent to a skip compensated for 47% of missing plant yield at the lowest population.
- Observation Plants adjacent to a skip compensated for 19% of missing plant yield at the highest population.
- Intervention effect Skips reduced corn yield.
- Intervention effect At 18 000 plants/acre, five-hill groups with a skip yielded 11% less than controls.
- Intervention effect At 30 000 plants/acre, five-hill groups with a skip yielded 16% less than controls.
- Intervention effect Doubles raised five-hill corn yield by 15% at the lowest population.
- Intervention effect Doubles raised five-hill corn yield by 8% at 30 000 plants/acre.
- Observation The two corn hybrids responded similarly to population, skips and doubles.
- Method / resource The authors conclude that spacing standard deviation alone may not adequately predict yield loss.
- Recommendation The authors recommend increasing seeding rates where populations are inadequate to partly overcome skips.