Abstract
Soil carryover of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)- s -triazine] following annual applications to a sorghum [ Sorghum bicolor (L.) Moench] monoculture was studied by assessing sorghum yield factors as well as yields of a subsequent bioassay crop of oats ( Avena sativa L.). Atrazine applications of 3.4 kg/ha or more increased sorghum injury and rates of 4.5 kg/ha and more increased seed weight and decreased sorghum stand. Sorghum recovered from early atrazine injury and stand loss and generally maintained yields. Rates of 2.2 kg/ha did not reduce sorghum yields even with repeated annual usage. There appears to be little hazard of reducing sorghum yields due to atrazine carryover in the soil from annual atrazine applications at normal rates to a clay loam or silty clay loam soil in eastern Nebraska. However, atrazine carryover will have to be a consideration if the grower plans to rotate to a susceptible crop such as oats.
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Claims 7
Claim · model-written summary
Atrazine applications of at least 3.4 kg/ha increased sorghum injury.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Atrazine applications of 3.4 kg/ha or more increased sorghum injury”
Claim · model-written summary
Atrazine rates of at least 4.5 kg/ha increased sorghum seed weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rates of 4.5 kg/ha and more increased seed weight and decreased sorghum stand”
Claim · model-written summary
Atrazine rates of at least 4.5 kg/ha decreased sorghum stand.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rates of 4.5 kg/ha and more increased seed weight and decreased sorghum stand”
Claim · model-written summary
Sorghum recovered from early atrazine injury and stand loss and generally maintained yields.
- Outcome
- early atrazine injury and stand losse0
- Direction
- recoverede0
- Qualifier
- generally maintained yieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sorghum recovered from early atrazine injury and stand loss and generally maintained yields.”
Claim · model-written summary
Repeated annual atrazine usage at 2.2 kg/ha did not reduce sorghum yields.
- Treatment
- Rates of 2.2 kg/hae0
- Outcome
- sorghum yieldse0
- Direction
- did not reducee0
- Qualifier
- repeated annual usagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rates of 2.2 kg/ha did not reduce sorghum yields even with repeated annual usage.”
Claim · model-written summary
The authors infer little hazard of sorghum yield reduction from normal annual atrazine rates on clay loam or silty clay loam in eastern Nebraska.
- Treatment
- annual atrazine applications at normal ratese0
- Outcome
- little hazard of reducing sorghum yieldse0
- Qualifier
- clay loam or silty clay loam soile0
- Setting
- eastern Nebraskae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There appears to be little hazard of reducing sorghum yields due to atrazine carryover in the soil from annual atrazine applications at normal rates to a clay loam or silty clay loam soil in eastern Nebraska.”
Claim · model-written summary
Atrazine carryover must be considered when rotating to susceptible crops such as oats.
- Taxon
- oats
Avena sativae0 - Outcome
- atrazine carryover will have to be a consideratione0
- Qualifier
- rotate to a susceptible crop such as oatse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, atrazine carryover will have to be a consideration if the grower plans to rotate to a susceptible crop such as oats.”
The same questions in other papers
atrazine · crop injury · SorghumPositive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
7 papers more in this group
See all 11 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.