Abstract
Experiments were conducted at Lincoln and North Platte, Nebraska, during 1967 and 1968 to determine the effect of early preplant applications of 2-chloro-4-(ethylamino)-6-(isopropylamino)- s -triazine (atrazine) on sorghum [ Sorghum bicolor (L.) Moench ‘Nebraska 505′] and weed yields. Atrazine at 2.24 kg/ha was applied on separate plots preplant and incorporated about April 15, April 30, and May 15, and also preemergence without incorporation about May 17, after sorghum was planted. Sorghum grain yields were highest on plots where atrazine was applied preemergence rather than preplant due mainly to better weed control. Sorghum planted with planter units equipped with furrow openers, set to remove 2.5 to 5 cm of surface soil, had better sorghum stands and smaller weed yields than sorghum planted without removing surface soil. Sorghum population was the lowest following the April 30 atrazine application due to stand loss at North Platte, but grain yields were not significantly different from other preplant treatments since stand loss was compensated for by more heads per plant, larger heads, and larger seed.
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Claims 5
Claim · model-written summary
Sorghum grain yields were highest where atrazine was applied preemergence rather than preplant, due mainly to better weed control.
- Taxon
- Sorghum bicolor
Sorghum bicolore0 - Material
- Nebraska 505e0
- Treatment
- atrazine was applied preemergencee1
- Outcome
- grain yieldse1
- Direction
- higheste1
- Qualifier
- due mainly to better weed controle1
- Comparator
- preplante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum [ Sorghum bicolor (L.) Moench ‘Nebraska 505′] and weed yields”
e1“Sorghum grain yields were highest on plots where atrazine was applied preemergence rather than preplant due mainly to better weed control”
Claim · model-written summary
The April 30 atrazine application gave the lowest sorghum population at North Platte, due to stand loss.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- April 30 atrazine applicatione2
- Outcome
- Sorghum populatione2
- Direction
- loweste2
- Qualifier
- due to stand losse2
- Setting
- North Plattee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum [ Sorghum bicolor (L.) Moench ‘Nebraska 505′] and weed yields”
e2“Sorghum population was the lowest following the April 30 atrazine application due to stand loss at North Platte”
Claim · model-written summary
Grain yields after preplant treatments did not differ significantly, as stand loss was compensated by more heads, larger heads and larger seed.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- preplante3
- Outcome
- grain yieldse3
- Direction
- not significantly differente3
- Qualifier
- since stand loss was compensated for by more heads per plant, larger heads, and larger seede3
- Comparator
- other preplant treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum [ Sorghum bicolor (L.) Moench ‘Nebraska 505′] and weed yields”
e3“but grain yields were not significantly different from other preplant treatments since stand loss was compensated for by more heads per plant, larger heads, and larger seed”
Claim · model-written summary
Furrow openers that removed 2.5 to 5 cm of surface soil gave better sorghum stands than planting without removing soil.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- furrow openers, set to remove 2.5 to 5 cm of surface soile4
- Outcome
- sorghum standse4
- Direction
- bettere4
- Comparator
- sorghum planted without removing surface soile4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum [ Sorghum bicolor (L.) Moench ‘Nebraska 505′] and weed yields”
e4“Sorghum planted with planter units equipped with furrow openers, set to remove 2.5 to 5 cm of surface soil, had better sorghum stands and smaller weed yields than sorghum planted without removing surface soil”
Claim · model-written summary
Furrow openers that removed 2.5 to 5 cm of surface soil gave smaller weed yields than planting without removing soil.
- Taxon
- Sorghum bicolorSorghum bicolore0
- Treatment
- furrow openers, set to remove 2.5 to 5 cm of surface soile4
- Outcome
- weed yieldse4
- Direction
- smallere4
- Comparator
- sorghum planted without removing surface soile4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum [ Sorghum bicolor (L.) Moench ‘Nebraska 505′] and weed yields”
e4“Sorghum planted with planter units equipped with furrow openers, set to remove 2.5 to 5 cm of surface soil, had better sorghum stands and smaller weed yields than sorghum planted without removing surface soil”
The same questions in other papers
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- no effect
- negative
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See all 37 papers →irrigation · organism · Sorghum bicolor (sorghum)Results agree
1 paper in the same direction as this paper
- positive
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.