Abstract
The effects of johnsongrass [ Sorghum halepense (L.) Pers. # SORHA] infestations were determined during a 2-yr study on sugarcane ( Saccharum officinarum L. ‘CP-65-357’) yield. Both cane and sugar yields were lower (36 and 31%, respectively) in plots heavily infested with johnsongrass than in weed-free plots. Sugarcane yields were inversely influenced by johnsongrass equivalents (the sum of the values obtained by multiplying the number of clumps by their corresponding importance value for each plot). In 1983, both johnsongrass standing crop and johnsongrass equivalents correlated negatively with cane yield much better than any other factor combinations, while in 1984, the same was true for stalk population. Substantial yield reductions from johnsongrass interference were observed at johnsongrass infestation levels higher than 15 to 35%.
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Claims 6
Claim · model-written summary
Cane yield was lower in plots heavily infested with johnsongrass than in weed-free plots.
- Taxon
- Sugarcane (Saccharum officinarum)
Saccharum officinarumt0 - Treatment
- heavily infested with johnsongrasse1
- Interactor
- Johnsongrass (Sorghum halepense)
.jpg?width=60)
Sorghum halepenset0weed - Outcome
- cane and sugar yieldse1
- Direction
- lowere1
- Value
- 36e1
- Comparator
- weed-free plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield”
e1“Both cane and sugar yields were lower (36 and 31%, respectively) in plots heavily infested with johnsongrass than in weed-free plots”
Claim · model-written summary
Sugar yield was lower in plots heavily infested with johnsongrass than in weed-free plots.
- Taxon
- Sugarcane (Saccharum officinarum)Saccharum officinarumt0
- Treatment
- heavily infested with johnsongrasse1
- Interactor
- Johnsongrass (Sorghum halepense)Sorghum halepenset0weed
- Outcome
- cane and sugar yieldse1
- Direction
- lowere1
- Value
- 31%e1
- Comparator
- weed-free plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield”
e1“Both cane and sugar yields were lower (36 and 31%, respectively) in plots heavily infested with johnsongrass than in weed-free plots”
Claim · model-written summary
Sugarcane yields were inversely influenced by johnsongrass equivalents.
- Taxon
- Sugarcanee2
- Interactor
- johnsongrassSorghum halepensee2weedt0
- Outcome
- Sugarcane yieldse2
- Direction
- inversely influencede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield”
e2“Sugarcane yields were inversely influenced by johnsongrass equivalents”
Claim · model-written summary
In 1983, johnsongrass standing crop and johnsongrass equivalents correlated negatively with cane yield better than other factor combinations.
- Taxon
- Sugarcane (Saccharum officinarum)Saccharum officinarumt0
- Interactor
- johnsongrassSorghum halepensee3weedt0
- Outcome
- cane yielde3
- Direction
- correlated negativelye3
- Qualifier
- In 1983e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield”
e3“In 1983, both johnsongrass standing crop and johnsongrass equivalents correlated negatively with cane yield much better than any other factor combinations”
Claim · model-written summary
In 1984, johnsongrass stalk population correlated negatively with cane yield better than other factor combinations.
- Taxon
- Sugarcane (Saccharum officinarum)Saccharum officinarumt0
- Interactor
- johnsongrassSorghum halepensee3weedt0
- Outcome
- stalk populatione3
- Direction
- correlated negativelye3
- Qualifier
- while in 1984e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield”
e3“In 1983, both johnsongrass standing crop and johnsongrass equivalents correlated negatively with cane yield much better than any other factor combinations, while in 1984, the same was true for stalk population”
Claim · model-written summary
Substantial sugarcane yield reductions occurred at johnsongrass infestation levels higher than 15 to 35%.
- Taxon
- Sugarcane (Saccharum officinarum)Saccharum officinarumt0
- Interactor
- johnsongrassSorghum halepensee5weedt0
- Outcome
- yield reductionse5
- Value
- 15 to 35%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Johnsongrass (Sorghum halepense) Density on Sugarcane (Saccharum officinarum) Yield”
e5“Substantial yield reductions from johnsongrass interference were observed at johnsongrass infestation levels higher than 15 to 35%”
The same questions in other papers
infection · yield · Saccharum officinarum (sugarcane)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
5 papers more in this group
See all 9 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.