Claim · model-written summary
Portulaca seed production was significantly greater in the absence of a corn crop.
PortulacaNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Seed production by Amaranthus, Chenopodium and Portulaca was significantly greater in the absence of a corn crop”
Title
Effects of Tillage and Mulch on Weed Seed Production and Seed Banks in Sweet Corn
Charles L. Mohler; M. Brett Callaway Journal of Applied Ecology 1995. doi:10.2307/2404658
Other claims from this paper (18)
- Intervention effect Amaranthus seed production was significantly greater in no-till than in till treatments.
- Intervention effect Digitaria seed production was significantly greater in no-till than in till treatments.
- Intervention effect Amaranthus seed production was significantly greater in the absence of a corn crop.
- Intervention effect Chenopodium seed production was significantly greater in the absence of a corn crop.
- Intervention effect Secale cereale mulch decreased Portulaca seed production in one year.
- Intervention effect Digitaria seed banks were greater in no-till than in till treatments.
- Intervention effect Seed banks of winter annual forbs were greater in till treatments.
- Intervention effect Presence of a corn crop did not affect weed seed banks until the final year of the study.
- Intervention effect In the final year, Amaranthus seed banks were greater in the absence of a crop.
- Intervention effect In the final year, Chenopodium seed banks were greater in the absence of a crop.
- Intervention effect In the final year, Portulaca seed banks were greater in the absence of a crop.
- Intervention effect Amaranthus had exceptionally large seed production and seed banks in the uncropped treatment without herbicides.
- Intervention effect Chenopodium had exceptionally large seed production and seed banks in the uncropped treatment without herbicides.
- Intervention effect Portulaca did not show exceptionally large seed production or seed banks in the uncropped treatment, apparently through competition with the two larger species.
- Intervention effect Digitaria did not show exceptionally large seed production or seed banks in the uncropped treatment, apparently through competition with the two larger species.
- Observation Most weed seeds were produced by the first cohort of plants to emerge.
- Mechanism Differences among treatments in seed number per unit area were primarily due to effects on individual plant size and seed production.
- Observation Effects on weed seedling density and rate of survival to maturity were of secondary importance.