Abstract
Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations. Other variables examined were lime treatments, atrazine rates, and acid-forming (NH 4 NO 3 ) vs. nonacid-forming (NaNO 3 ) nitrogen fertilizers. Mean surface soil pH levels during the growing season were higher with no-tillage than conventional tillage, because of the retention of lime in the surface in no-tillage vs. mixing it with the soil in conventional tillage, but there was no consistent increase in atrazine efficacy or longevity in one system over the other. Liming significantly increased atrazine efficacy and longevity in both no-tillage and conventional-tillage systems. Increased rates of atrazine increased weed control and longevity of the herbicide. Use of NaNO 3 as a nitrogen source resulted in increased atrazine efficacy and longevity as compared with use of NH 4 NO 3 during the first year, which was relatively dry, but had no effect during the second year, which was relatively wet.
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Claims 6
Claim · model-written summary
No-tillage had higher surface soil pH than conventional tillage.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- no-tillagee2
- Outcome
- surface soil pH levelse0
- Direction
- highere0
- Comparator
- conventional tillagee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean surface soil pH levels during the growing season were higher with no-tillage than conventional tillage”
e1“Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations.”
e2“higher with no-tillage than conventional tillage”
e3“higher with no-tillage than conventional tillage”
Claim · model-written summary
Tillage systems showed no consistent difference in atrazine efficacy or longevity.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- no-tillagee2
- Outcome
- atrazine efficacy or longevitye0
- Direction
- no consistent increasee0
- Comparator
- conventional tillagee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no consistent increase in atrazine efficacy or longevity in one system over the other”
e1“Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations.”
e2“higher with no-tillage than conventional tillage”
e3“higher with no-tillage than conventional tillage”
Claim · model-written summary
Liming significantly increased atrazine efficacy and longevity in both tillage systems.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Liminge0
- Outcome
- atrazine efficacy and longevitye2
- Direction
- increasede0
- Qualifier
- both no-tillage and conventional-tillage systemse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming significantly increased atrazine efficacy and longevity in both no-tillage and conventional-tillage systems”
e1“Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations.”
e2“Liming significantly increased atrazine efficacy and longevity”
Claim · model-written summary
Higher atrazine rates increased weed control and herbicide longevity.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Increased rates of atrazinee0
- Outcome
- weed control and longevity of the herbicidee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased rates of atrazine increased weed control and longevity of the herbicide”
e1“Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations.”
Claim · model-written summary
NaNO 3 increased atrazine efficacy and longevity relative to NH 4 NO 3 in the relatively dry first year.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- NaNO 3e2
- Outcome
- atrazine efficacy and longevitye4
- Direction
- increasede0
- Qualifier
- first year, which was relatively drye0
- Comparator
- NH 4 NO 3e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Use of NaNO 3 as a nitrogen source resulted in increased atrazine efficacy and longevity as compared with use of NH 4 NO 3 during the first year, which was relatively dry”
e1“Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations.”
e2“Use of NaNO 3 as a nitrogen source”
e3“as compared with use of NH 4 NO 3 during the first year”
e4“Liming significantly increased atrazine efficacy and longevity”
Claim · model-written summary
The nitrogen source had no effect in the relatively wet second year.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- NaNO 3e2
- Outcome
- atrazine efficacy and longevitye4
- Direction
- no effecte0
- Qualifier
- second year, which was relatively wete0
- Comparator
- NH 4 NO 3e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but had no effect during the second year, which was relatively wet”
e1“Efficacy of atrazine [2-chloro-4-(ethylamino-6-(isopropylamino)- s -triazine] applied preemergence to no-tillage and conventional-tillage corn ( Zea mays L.) was studied in the field for 2 yr at two locations.”
e2“Use of NaNO 3 as a nitrogen source”
e3“as compared with use of NH 4 NO 3 during the first year”
e4“Liming significantly increased atrazine efficacy and longevity”
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See all 49 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.