Abstract
Early and narrow‐row planting are promising tools that increase soybean [ Glycine max (L.) Merr.] growth and yield in southwestern Japan, but optimum planting date and row width have not been established. We conducted the present study in 2012 and 2013 to assess the effect of early (mid‐June) and narrow‐row (20 and/or 35 cm) planting on agronomic traits of soybean and weed emergence using a new promising short‐stem cultivar, Sachiyutaka A1, in comparison with conventional planting date (mid‐ to late July) and row width (75 cm). The light interception exceeded 90% more than 14 d earlier in narrower‐row treatments than in the 75 cm row width. This result might lead to 60 and 98% greater suppression of weed emergence at harvest in the 20 and 35 cm row width (3 and 53 g m −2 ), respectively, compared with the 75 cm row width (153 g m −2 ). Early planting increased shoot dry weight by 200 g m −2 , leading to a 2‐yr average significant yield increase of approximately 9% in early planting compared to normal planting (266 vs. 244 g m −2 ). Averaged across the experimental year and planting date, Sachiyutaka A1 planted at the 20 cm row width had the lowest lodging score of 1.6 (most lodging resistance) among the row widths tested. These results suggest that planting Sachiyutaka A1 in mid‐June at a 20 cm row width leads to a higher seed yield than conventional planting date and row width, with minimal or less weed emergence and lodging of the plant.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
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
Narrow soybean rows reached more than 90% light interception over 14 days earlier than 75 cm rows.
- Taxon
- soybean
Glycine maxe1 - Treatment
- narrower‐row treatmentse0
- Outcome
- light interceptione0
- Direction
- earliere0
- Value
- more than 14 de0
- Comparator
- 75 cm row widthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The light interception exceeded 90% more than 14 d earlier in narrower‐row treatments than in the 75 cm row width.”
e1“soybean [ Glycine max (L.) Merr.]”
Claim · model-written summary
The 20 cm soybean row width gave 60% greater suppression of weed emergence than 75 cm rows.
- Taxon
- soybeanGlycine maxe1
- Treatment
- 20 cm row widthe2
- Outcome
- suppression of weed emergence at harveste0
- Direction
- greater suppressione0
- Value
- 60e0
- Qualifier
- 3 and 53 g m −2e0
- Comparator
- 75 cm row widthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“60 and 98% greater suppression of weed emergence at harvest in the 20 and 35 cm row width (3 and 53 g m −2 ), respectively, compared with the 75 cm row width (153 g m −2 )”
e1“soybean [ Glycine max (L.) Merr.]”
e2“Sachiyutaka A1 planted at the 20 cm row width had the lowest lodging score of 1.6 (most lodging resistance) among the row widths tested.”
Claim · model-written summary
The 35 cm soybean row width gave 98% greater suppression of weed emergence than 75 cm rows.
- Taxon
- soybeanGlycine maxe1
- Treatment
- 35 cm row widthe0
- Outcome
- suppression of weed emergence at harveste0
- Direction
- greater suppressione0
- Value
- 98%e0
- Comparator
- 75 cm row widthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“60 and 98% greater suppression of weed emergence at harvest in the 20 and 35 cm row width (3 and 53 g m −2 ), respectively, compared with the 75 cm row width (153 g m −2 )”
e1“soybean [ Glycine max (L.) Merr.]”
Claim · model-written summary
Early planting increased soybean shoot dry weight by 200 g m −2.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Early plantinge0
- Outcome
- shoot dry weighte0
- Direction
- increasede0
- Value
- 200 g m −2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early planting increased shoot dry weight by 200 g m −2”
e1“soybean [ Glycine max (L.) Merr.]”
Claim · model-written summary
Early planting significantly increased two-year mean soybean yield by approximately 9% relative to normal planting.
- Taxon
- soybeanGlycine maxe1
- Treatment
- early plantinge0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- approximately 9%e0
- Qualifier
- 266 vs. 244 g m −2e0
- Comparator
- normal plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leading to a 2‐yr average significant yield increase of approximately 9% in early planting compared to normal planting (266 vs. 244 g m −2 )”
e1“soybean [ Glycine max (L.) Merr.]”
Claim · model-written summary
Sachiyutaka A1 at 20 cm row width had the lowest lodging score, 1.6, among tested row widths.
- Taxon
- soybeanGlycine maxe1
- Material
- Sachiyutaka A1e0
- Treatment
- 20 cm row widthe0
- Outcome
- lodging scoree0
- Direction
- loweste0
- Value
- 1.6e0
- Comparator
- row widths testede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sachiyutaka A1 planted at the 20 cm row width had the lowest lodging score of 1.6 (most lodging resistance) among the row widths tested.”
e1“agronomic traits of soybean”
Claim · model-written summary
The authors recommend planting Sachiyutaka A1 in mid-June at 20 cm row width for greater seed yield with little weed emergence and lodging.
- Taxon
- soybeanGlycine maxe1
- Material
- Sachiyutaka A1e0
- Outcome
- planting Sachiyutaka A1 in mid‐June at a 20 cm row widthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that planting Sachiyutaka A1 in mid‐June at a 20 cm row width leads to a higher seed yield than conventional planting date and row width, with minimal or less weed emergence and lodging of the plant.”
e1“agronomic traits of soybean”
The same questions in other papers
density · weed · Glycine max (soybean)Positive and negative results
20 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
27 papers more in this group
See all 31 papers →sowing time · growth · Glycine max (soybean)Positive and negative results
36 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
68 papers more in this group
See all 72 papers →density · growth · Glycine max (soybean)Positive and negative results
58 papers in the same direction as this paper · 23 in the opposite direction
- positive
- positive
- negative
78 papers more in this group
See all 82 papers →sowing time · yield · Glycine max (soybean)Positive and negative results
114 papers in the same direction as this paper · 89 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- positive
203 papers more in this group
See all 207 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.