Abstract
Six herbicide treatments and hand weeding of grain corn (Zea mays L.) were compared with and without a single inter-row tillage operation in June. Grain yields were significantly increased by tillage and negatively correlated with weed weights. In a subset of plots, surface soil bulk density was lower, and air-filled porosity was higher after the tillage. Bulk densities were decreased in September by a possible interaction between inter-row tillage and herbicide use. Grain yields were negatively correlated with bulk density in June and positively correlated with soil moisture in September, suggesting that some of the yield improvement from tillage was the result of better soil physical conditions.Key words: Zea mays L., atrazine, herbicides, tillage, soil structure, bulk density
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Grain corn yields were significantly increased by inter-row tillage.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- tillagee0
- Outcome
- Grain yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were significantly increased by tillage”
e1“grain corn (Zea mays L.)”
Claim · model-written summary
In a subset of corn plots, surface soil bulk density was lower after tillage.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- tillagee0
- Outcome
- surface soil bulk densitye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surface soil bulk density was lower, and air-filled porosity was higher after the tillage”
e1“grain corn (Zea mays L.)”
Claim · model-written summary
In a subset of corn plots, air-filled porosity was higher after tillage.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- tillagee0
- Outcome
- air-filled porositye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surface soil bulk density was lower, and air-filled porosity was higher after the tillage”
e1“grain corn (Zea mays L.)”
Claim · model-written summary
Soil bulk densities were decreased in September by a possible interaction between inter-row tillage and herbicide use.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- inter-row tillage and herbicide usee0
- Outcome
- Bulk densitiese0
- Direction
- decreasede0
- Qualifier
- possible interactione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulk densities were decreased in September by a possible interaction between inter-row tillage and herbicide use”
e1“grain corn (Zea mays L.)”
Claim · model-written summary
Grain corn yields were negatively correlated with soil bulk density in June.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- Grain yieldse0
- Direction
- negatively correlatede0
- Qualifier
- in Junee0
- Comparator
- bulk densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were negatively correlated with bulk density in June and positively correlated with soil moisture in September”
e1“grain corn (Zea mays L.)”
Claim · model-written summary
Grain corn yields were positively correlated with soil moisture in September.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- Grain yieldse0
- Direction
- positively correlatede0
- Qualifier
- in Septembere0
- Comparator
- soil moisturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields were negatively correlated with bulk density in June and positively correlated with soil moisture in September”
e1“grain corn (Zea mays L.)”
Claim · model-written summary
The authors suggest that some of the corn yield improvement from tillage resulted from better soil physical conditions.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- tillagee0
- Outcome
- yield improvemente0
- Qualifier
- better soil physical conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some of the yield improvement from tillage was the result of better soil physical conditions”
e1“grain corn (Zea mays L.)”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
- no effect
- negative
- no effect
1,095 papers more in this group
See all 1,099 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.