Abstract
Increasing plant density of grain sorghum [ Sorghum bicolor (L.) Moench.] from 57100 to 114300 plants/ha had no significant effect on grain yields, but significantly increased Striga hermonthica (Del.) ‘Benth’ # STRHE shoot yields by 49% in S. hermonthica infested soil of the Sudan. Addition of urea at 43, 86, and 172 kg N/ha increased grain yields by 14, 25, and 45%, respectively, above the control and S. hermonthica shoot yields were reduced by 14, 21, and 35%, respectively, below the control. Although average grain yields in 1981 were 77% less than in 1980, S. hermonthica shoot yields were significantly increased by about sixfold. Grain sorghum yields of pure stands were not consistent over both years. In 1980, the cultivar ‘Ariana’ outyielded ‘Tetron’, but in 1981 the reverse occurred. However, in both years, the 50:50 mixture of both cultivars gave intermediate grain yields. While pure stands of Tetron’ sustained the lowest infestations of S. hermonthica and ‘Ariana’ had the greatest, the mixture had intermediate infestations which were on average 31% less than those of ‘Ariana’. Thus, the results suggest that the cultivation of equiproportional mixtures of relatively resistant and susceptible grain sorghum varieties, coupled with the use of high rates of nitrogenous fertilizer and wider inter- and intra-row spacing, may be a better cultural practice under dense striga infestations.
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Claims 13
Claim · model-written summary
Doubling grain sorghum density did not significantly change grain yield.
- Taxon
- grain sorghum
Sorghum bicolore0 - Treatment
- Increasing plant densitye0
- Outcome
- grain yieldse0
- Direction
- no significant effecte0
- Value
- 114300 plants/hae0
- Comparator
- 57100e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant density of grain sorghum [ Sorghum bicolor (L.) Moench.] from 57100 to 114300 plants/ha had no significant effect on grain yields”
Claim · model-written summary
Higher sorghum density increased Striga shoot yield by 49%.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- Increasing plant densitye0
- Interactor
- Striga hermonthica
Striga hermonthicae0parasite - Outcome
- Striga hermonthica (Del.) ‘Benth’ # STRHE shoot yieldse0
- Direction
- increasede0
- Value
- 49%e0
- Comparator
- 57100e0
- Setting
- Sudane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing plant density of grain sorghum [ Sorghum bicolor (L.) Moench.] from 57100 to 114300 plants/ha had no significant effect on grain yields, but significantly increased Striga hermonthica (Del.) ‘Benth’ # STRHE shoot yields by 49% in S. hermonthica infested soil of the Sudan.”
Claim · model-written summary
Urea at 43 kg N/ha increased sorghum grain yield by 14%.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- urea at 43e0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 14e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of urea at 43, 86, and 172 kg N/ha increased grain yields by 14, 25, and 45%, respectively, above the control”
t0“Grain Sorghum”
Claim · model-written summary
Urea at 86 kg N/ha increased sorghum grain yield by 25%.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- urea at 43, 86e0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 25e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of urea at 43, 86, and 172 kg N/ha increased grain yields by 14, 25, and 45%, respectively, above the control”
t0“Grain Sorghum”
Claim · model-written summary
Urea at 172 kg N/ha increased sorghum grain yield by 45%.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- urea at 43, 86, and 172 kg N/hae0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 45%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of urea at 43, 86, and 172 kg N/ha increased grain yields by 14, 25, and 45%, respectively, above the control”
t0“Grain Sorghum”
Claim · model-written summary
Urea reduced Striga shoot yields by 14, 21, and 35% at the three respective rates.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- urea at 43, 86, and 172 kg N/hae1
- Interactor
- S. hermonthicaStriga hermonthicae0parasite
- Outcome
- S. hermonthica shoot yieldse0
- Direction
- reducede0
- Value
- 14, 21, and 35%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. hermonthica shoot yields were reduced by 14, 21, and 35%, respectively, below the control”
e1“Addition of urea at 43, 86, and 172 kg N/ha”
t0“Grain Sorghum”
Claim · model-written summary
Average sorghum grain yield in 1981 was 77% lower than in 1980.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- average grain yieldse0
- Direction
- lesse0
- Value
- 77%e0
- Comparator
- 1980e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average grain yields in 1981 were 77% less than in 1980”
t0“Grain Sorghum”
Claim · model-written summary
Striga shoot yield in 1981 was about sixfold higher than in 1980.
- Taxon
- Grain SorghumSorghum bicolort0
- Interactor
- S. hermonthicaStriga hermonthicae0parasite
- Outcome
- S. hermonthica shoot yieldse0
- Direction
- increasede0
- Value
- about sixfolde0
- Comparator
- 1980e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although average grain yields in 1981 were 77% less than in 1980, S. hermonthica shoot yields were significantly increased by about sixfold”
t0“Grain Sorghum”
Claim · model-written summary
Ariana yielded more than Tetron in 1980.
- Taxon
- Grain SorghumSorghum bicolort0
- Material
- ‘Ariana’e0
- Outcome
- outyieldede0
- Direction
- outyieldede0
- Comparator
- ‘Tetron’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1980, the cultivar ‘Ariana’ outyielded ‘Tetron’”
t0“Grain Sorghum”
Claim · model-written summary
Tetron yielded more than Ariana in 1981.
- Taxon
- Grain SorghumSorghum bicolort0
- Material
- ‘Tetron’e0
- Outcome
- the reverse occurrede0
- Comparator
- ‘Ariana’e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1980, the cultivar ‘Ariana’ outyielded ‘Tetron’, but in 1981 the reverse occurred.”
t0“Grain Sorghum”
Claim · model-written summary
The 50:50 cultivar mixture had intermediate grain yields in both years.
- Taxon
- Grain SorghumSorghum bicolort0
- Material
- mixture of both cultivarse0
- Outcome
- grain yieldse0
- Direction
- intermediatee0
- Qualifier
- 50:50e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in both years, the 50:50 mixture of both cultivars gave intermediate grain yields”
t0“Grain Sorghum”
Claim · model-written summary
Tetron pure stands had the lowest Striga infestation, Ariana the greatest, and the mixture an intermediate infestation 31% below Ariana.
- Taxon
- Grain SorghumSorghum bicolort0
- Interactor
- S. hermonthicaStriga hermonthicae0parasite
- Outcome
- infestations of S. hermonthicae0
- Direction
- lesse0
- Value
- 31%e0
- Comparator
- ‘Ariana’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pure stands of Tetron’ sustained the lowest infestations of S. hermonthica and ‘Ariana’ had the greatest, the mixture had intermediate infestations which were on average 31% less than those of ‘Ariana’”
t0“Grain Sorghum”
Claim · model-written summary
The authors suggest equal mixtures of resistant and susceptible sorghum, high nitrogen, and wider spacing under dense Striga infestation.
- Taxon
- grain sorghumSorghum bicolore0
- Outcome
- cultivation of equiproportional mixtures of relatively resistant and susceptible grain sorghum varieties, coupled with the use of high rates of nitrogenous fertilizer and wider inter- and intra-row spacinge0
StrigaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivation of equiproportional mixtures of relatively resistant and susceptible grain sorghum varieties, coupled with the use of high rates of nitrogenous fertilizer and wider inter- and intra-row spacing, may be a better cultural practice under dense striga infestations”
The same questions in other papers
nitrogen · yield · Sorghum bicolor (sorghum)Results differ
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See all 100 papers →density · yield · Sorghum bicolor (sorghum)Positive and negative results
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See all 41 papers →nitrogen · Striga hermonthica · Sorghum bicolor (sorghum)Results agree
2 papers in the same direction as this paper
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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.