Abstract
Experiments were conducted from 1989 to 1991 to determine the critical period of johnsongrass control in field corn. Maximum weed-infested and weed-free periods of 0 to 20 wk after corn emergence were maintained by either hand weeding or nicosulfuron application. Interference duration effects on corn grain yield were not affected by johnsongrass control methods. The critical period for johnsongrass control was determined to be between 3 and 6.5 wk after corn emergence to avoid losses above 5% of yield produced by full-season weed-free corn.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 2
Claim · model-written summary
Johnsongrass control methods did not affect the interference duration effects on corn grain yield.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- johnsongrass control methodse1
- Interactor
- johnsongrass
.jpg?width=60)
Sorghum halepensee1weed - Outcome
- Interference duration effects on corn grain yielde1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Interference duration effects on corn grain yield were not affected by johnsongrass control methods”
Claim · model-written summary
The critical period for johnsongrass control in field corn was between 3 and 6.5 weeks after corn emergence, to avoid yield losses above 5% relative to full-season weed-free corn.
- Taxon
- cornZea mays subsp. mayse2
- Interactor
- johnsongrassSorghum halepensee2weed
- Outcome
- critical period for johnsongrass controle2
- Value
- between 3 and 6.5 wk after corn emergencee2
- Qualifier
- to avoid losses above 5% of yielde2
- Comparator
- full-season weed-free corne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The critical period for johnsongrass control was determined to be between 3 and 6.5 wk after corn emergence to avoid losses above 5% of yield produced by full-season weed-free corn”
The same questions in other papers
Sorghum halepense · yield · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.