Abstract
Studies were conducted from 1990 through 1994 near Tifton, GA, on the population dynamics of yellow nutsedge and certain annual weeds in peanut—corn and peanut—cotton rotations. Converse rotation sequences were included to eliminate year effects. Continuous fallow plots (noncrop) were included for comparison. Within each crop, including fallow, were 3 levels of weed management: low, moderate, and intensive. Weed densities and numbers of yellow nutsedge tubers were not affected by crop rotations, but they were affected by individual crops and weed management systems in each crop. Fallow plots, including those with intensive fallow weed management using tillage and nonselective herbicides, consistently contained more yellow nutsedge plants and tubers than other plots. Moderate and intensive weed control systems in peanut and cotton reduced yellow nutsedge densities and tubers, but only peanut yields were increased by intensive weed management. Weed management systems did not affect yellow nutsedge densities in corn, although yields were increased by moderate and intensive systems due to improved control of other weeds. Our results suggest that uninterrupted plantings of peanut, corn, or cotton with moderate levels of weed management are generally sufficient to suppress yellow nutsedge and allow for optimum crop yield. If fields are fallow, yellow nutsedge population densities and tubers will increase exponentially, even with intensive fallow weed management.
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Claims 9
Claim · model-written summary
Crop rotations did not affect weed density or yellow nutsedge tuber numbers.
- Taxon
- peanut
Arachis hypogaeat0 - Treatment
- crop rotationse0
- Interactor
- yellow nutsedgee0weed
- Outcome
- Weed densities and numbers of yellow nutsedge tuberse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed densities and numbers of yellow nutsedge tubers were not affected by crop rotations”
t0“peanut—corn and peanut—cotton rotations”
Claim · model-written summary
Individual crops and weed management systems affected weed densities and yellow nutsedge tubers.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- weed management systemse0
- Outcome
- they were affectede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they were affected by individual crops and weed management systems in each crop”
t0“peanut—corn and peanut—cotton rotations”
Claim · model-written summary
Fallow plots had more yellow nutsedge plants and tubers than other plots, including with intensive fallow management.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- Fallow plotse0
- Interactor
- yellow nutsedgee0weed
- Outcome
- yellow nutsedge plants and tuberse0
- Direction
- moree0
- Comparator
- other plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fallow plots, including those with intensive fallow weed management using tillage and nonselective herbicides, consistently contained more yellow nutsedge plants and tubers than other plots”
t0“peanut—corn and peanut—cotton rotations”
Claim · model-written summary
Moderate and intensive weed control in peanut and cotton reduced yellow nutsedge density and tubers.
- Taxon
- peanut and cotton
Gossypium hirsutumArachis hypogaeae0 - Treatment
- Moderate and intensive weed control systemse0
- Interactor
- yellow nutsedgee0weed
- Outcome
- yellow nutsedge densities and tuberse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate and intensive weed control systems in peanut and cotton reduced yellow nutsedge densities and tubers”
Claim · model-written summary
Intensive weed management increased peanut yields.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- intensive weed managemente0
- Outcome
- peanut yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only peanut yields were increased by intensive weed management”
Claim · model-written summary
Weed management did not affect yellow nutsedge density in corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Weed management systemse0
- Interactor
- yellow nutsedgee0weed
- Outcome
- yellow nutsedge densitiese0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed management systems did not affect yellow nutsedge densities in corn”
Claim · model-written summary
Moderate and intensive weed management increased corn yields through improved control of other weeds.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- moderate and intensive systemse0
- Interactor
- other weedse0weed
- Outcome
- yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields were increased by moderate and intensive systems due to improved control of other weeds”
t0“densities in corn”
Claim · model-written summary
The authors recommend uninterrupted peanut, corn or cotton with moderate weed management to suppress yellow nutsedge and optimize yield.
- Taxon
- peanut, corn, or cottonGossypium hirsutumArachis hypogaeaZea mays subsp. mayse0
- Interactor
- yellow nutsedgee0weed
- Outcome
- moderate levels of weed managemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“uninterrupted plantings of peanut, corn, or cotton with moderate levels of weed management are generally sufficient to suppress yellow nutsedge and allow for optimum crop yield”
Claim · model-written summary
Fallow fields were predicted to experience exponential increases in yellow nutsedge density and tubers despite intensive management.
- Taxon
- peanutArachis hypogaeat0
- Interactor
- yellow nutsedgee0weed
- Outcome
- yellow nutsedge population densities and tuberse0
- Direction
- increase exponentiallye0
- Setting
- fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If fields are fallow, yellow nutsedge population densities and tubers will increase exponentially, even with intensive fallow weed management”
t0“peanut—corn and peanut—cotton rotations”
The same questions in other papers
rotation · weed · Arachis hypogaea (peanut)Positive and negative results
1 in the opposite direction
- positive
herbicide · yield · Arachis hypogaea (peanut)Positive and negative results
171 papers in the same direction as this paper · 51 in the opposite direction · 7 reporting no difference from an alternative
- positive
- positive
- positive
226 papers more in this group
See all 230 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.