Abstract
Metolachlor and metribuzin loss in runoff was determined in three soybean tillage systems with and without a 4 by 2 m tall fescue vegetative filter strip. Soil erosion plots were 4 by 22 m with 3% slope. Regression analysis was used to describe herbicide concentration in runoff, and to determine if vegetative filter strips reduced herbicide concentration. Analysis of covariance indicated no difference in concentration of metolachlor or metribuzin in runoff from the three tillage systems within any vegetative filter strip treatment. Metolachlor loss in 1991 was highest from the no-till monocrop without a vegetative filter strip, and it was 65g ha −1 or approximately 2% of the amount applied. In 1992 and 1993, the no-till doublecrop had a total loss of 120 and 147 g ha −1 , respectively, approximately 4% of the amount applied. Similar results were noted with metribuzin, but total loss was as high as 46 g ha −1 or 11 % of the amount applied in 1993 from a no-till doublecrop system without a vegetative filter strip. When a vegetative filter strip was present, losses of metribuzin and metolachlor were reduced over 85% in 1993, and totaled 1.2 and 0.5%, respectively, of the amount applied. The vegetative filter strip reduced herbicide and suspended solids from runoff produced by a conventional-till production system to levels equal to or lower than a no-till doublecrop system.
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Claims 8
Claim · model-written summary
Metolachlor and metribuzin runoff concentrations did not differ among three soybean tillage systems within filter-strip treatments.
- Taxon
- Soybean (Glycine max)
Glycine maxt0 - Treatment
- three tillage systemse0
- Outcome
- concentration of metolachlor or metribuzin in runoffe0
- Direction
- no differencee0
- Comparator
- vegetative filter strip treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of covariance indicated no difference in concentration of metolachlor or metribuzin in runoff from the three tillage systems within any vegetative filter strip treatment.”
t0“Soybean (Glycine max)”
Claim · model-written summary
In 1991, metolachlor loss was highest under no-till monocropping without a filter strip at 65 g/ha, about 2% of applied amount.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- no-till monocrop without a vegetative filter stripe0
- Outcome
- Metolachlor losse0
- Direction
- higheste0
- Value
- 65g ha −1e0
- Qualifier
- approximately 2% of the amount appliede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Metolachlor loss in 1991 was highest from the no-till monocrop without a vegetative filter strip, and it was 65g ha −1 or approximately 2% of the amount applied.”
t0“Soybean (Glycine max)”
Claim · model-written summary
No-till doublecropping lost 120 g/ha metolachlor in 1992.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- no-till doublecrope0
- Outcome
- total losse0
- Value
- 120e0
- Qualifier
- In 1992e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1992 and 1993, the no-till doublecrop had a total loss of 120 and 147 g ha −1 , respectively, approximately 4% of the amount applied.”
t0“Soybean (Glycine max)”
Claim · model-written summary
No-till doublecropping lost 147 g/ha metolachlor in 1993.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- no-till doublecrope0
- Outcome
- total losse0
- Value
- 147 g ha −1e0
- Qualifier
- 1993e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1992 and 1993, the no-till doublecrop had a total loss of 120 and 147 g ha −1 , respectively, approximately 4% of the amount applied.”
t0“Soybean (Glycine max)”
Claim · model-written summary
Metribuzin loss reached 46 g/ha, or 11% of applied amount, without a filter strip in no-till doublecropping in 1993.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- no-till doublecrop system without a vegetative filter stripe0
- Outcome
- total losse0
- Value
- 46 g ha −1e0
- Qualifier
- 11 % of the amount applied in 1993e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total loss was as high as 46 g ha −1 or 11 % of the amount applied in 1993 from a no-till doublecrop system without a vegetative filter strip.”
t0“Soybean (Glycine max)”
Claim · model-written summary
A filter strip reduced metribuzin losses by over 85% in 1993 to 1.2% of applied amount.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- vegetative filter stripe0
- Outcome
- losses of metribuzine0
- Direction
- reducede0
- Value
- over 85%e0
- Qualifier
- 1.2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When a vegetative filter strip was present, losses of metribuzin and metolachlor were reduced over 85% in 1993, and totaled 1.2 and 0.5%, respectively, of the amount applied.”
t0“Soybean (Glycine max)”
Claim · model-written summary
A filter strip reduced metolachlor losses by over 85% in 1993 to 0.5% of applied amount.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- vegetative filter stripe0
- Outcome
- metolachlore0
- Direction
- reducede0
- Value
- over 85%e0
- Qualifier
- 0.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When a vegetative filter strip was present, losses of metribuzin and metolachlor were reduced over 85% in 1993, and totaled 1.2 and 0.5%, respectively, of the amount applied.”
t0“Soybean (Glycine max)”
Claim · model-written summary
The strip lowered herbicide and suspended-solid runoff from conventional tillage to at most the level of no-till doublecropping.
- Taxon
- Soybean (Glycine max)Glycine maxt0
- Treatment
- vegetative filter stripe0
- Outcome
- herbicide and suspended solids from runoffe0
- Direction
- reducede0
- Comparator
- no-till doublecrop systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The vegetative filter strip reduced herbicide and suspended solids from runoff produced by a conventional-till production system to levels equal to or lower than a no-till doublecrop system.”
t0“Soybean (Glycine max)”
The same questions in other papers
tillage · soil: physics · Glycine max (soybean)Positive and negative results
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See all 36 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.