Abstract
Solar radiation interception and dry matter production were studied in soybeans ( Glycine max (L.) Merr.) grown in various planting patterns (4 populations of 26, 52, 104, and 209 thousand plants per acre within each of 4 row widths – 5, 10, 20, and 40 inches). Increased population resulted in increased leaf area index (LAI) and a reduction in the number of days from emergance to 95% (daily basis) solar radiation interception (D 95 ). At corresponding populations of 52,000 or above, D 95 was considerably higher for the 40‐inch row pattern than for the other spatial arrangements, which differed in reaching D 95 by only a few days. Dry matter production was a functin of percent solar radiation interception regardless of planting pattern. However, the efficiency of utilization of intercepted energy differed between years for the mean of all treatments, and was significantly lower for the 208,000 plant population in 1962. These differences were attributed to a limitation imposed by moisture stress. Seed yield was not correlated with total dry matter produced, dry matter produced during seed formation, or solar radiation intercepted. As determined by differences in harvest index, seed yield was a function of differential utilization of photosynthate between vegetative and seed production. In general, high population or close plant spacing in any one direction tended to result in a low harvest index. Thus, while full interception during seed formation is required for maximum seed yield, conditions resulting in a high seasonal interception may not result in highest seed yield.
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Claims 13
Claim · model-written summary
Higher soybean population increased leaf area index.
- Taxon
- soybeans
Glycine maxe2 - Treatment
- Increased populatione0
- Outcome
- leaf area index (LAI)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased population resulted in increased leaf area index (LAI)”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Higher population reduced days to 95% daily solar interception.
- Taxon
- soybeansGlycine maxe2
- Treatment
- Increased populatione0
- Outcome
- number of days from emergance to 95% (daily basis) solar radiation interceptione0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased population resulted in increased leaf area index (LAI) and a reduction in the number of days from emergance to 95% (daily basis) solar radiation interception (D 95 )”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
At populations of at least 52,000, 40-inch rows took longer to reach D95 than other patterns.
- Taxon
- soybeansGlycine maxe2
- Treatment
- 40‐inch row patterne0
- Outcome
- D 95e0
- Direction
- highere0
- Qualifier
- 52,000 or abovee0
- Comparator
- other spatial arrangementse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At corresponding populations of 52,000 or above, D 95 was considerably higher for the 40‐inch row pattern than for the other spatial arrangements”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
The other spatial arrangements differed by only a few days in reaching D95.
- Taxon
- soybeansGlycine maxe2
- Outcome
- reaching D 95e0
- Value
- a few dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the other spatial arrangements, which differed in reaching D 95 by only a few days”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Dry matter production was related to percentage solar interception regardless of planting pattern.
- Taxon
- soybeansGlycine maxe2
- Treatment
- percent solar radiation interceptione0
- Outcome
- Dry matter productione0
- Qualifier
- regardless of planting patterne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter production was a functin of percent solar radiation interception regardless of planting pattern”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Intercepted energy utilization efficiency differed between years.
- Taxon
- soybeansGlycine maxe2
- Outcome
- efficiency of utilization of intercepted energye0
- Qualifier
- between yearse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the efficiency of utilization of intercepted energy differed between years for the mean of all treatments”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Energy utilization efficiency was significantly lower for the 208,000 plant population in 1962.
- Taxon
- soybeansGlycine maxe2
- Treatment
- 208,000 plant populatione0
- Outcome
- efficiency of utilization of intercepted energye1
- Direction
- lowere0
- Setting
- 1962e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was significantly lower for the 208,000 plant population in 1962”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
e1“the efficiency of utilization of intercepted energy differed between years for the mean of all treatments”
Claim · model-written summary
The authors attributed energy utilization differences to moisture stress.
- Taxon
- soybeansGlycine maxe2
- Outcome
- These differencese0
- Qualifier
- moisture stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These differences were attributed to a limitation imposed by moisture stress”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Seed yield was uncorrelated with total dry matter, dry matter during seed formation, and solar interception.
- Taxon
- soybeansGlycine maxe2
- Treatment
- solar radiation interceptede0
- Outcome
- Seed yielde0
- Direction
- not correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield was not correlated with total dry matter produced, dry matter produced during seed formation, or solar radiation intercepted”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Seed yield varied with photosynthate allocation between vegetative and seed production.
- Taxon
- soybeansGlycine maxe2
- Organ / stage
- seede0
- Outcome
- seed yielde0
- Qualifier
- differential utilization of photosynthate between vegetative and seed productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed yield was a function of differential utilization of photosynthate between vegetative and seed production”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
High population or close spacing tended to reduce harvest index.
- Taxon
- soybeansGlycine maxe2
- Treatment
- high population or close plant spacinge0
- Outcome
- harvest indexe0
- Direction
- lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high population or close plant spacing in any one direction tended to result in a low harvest index”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
Full interception during seed formation was required for maximum seed yield.
- Taxon
- soybeansGlycine maxe2
- Outcome
- maximum seed yielde0
- Qualifier
- full interception during seed formatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“full interception during seed formation is required for maximum seed yield”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
Claim · model-written summary
High seasonal interception did not necessarily give the highest seed yield.
- Taxon
- soybeansGlycine maxe2
- Treatment
- high seasonal interceptione0
- Outcome
- seed yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conditions resulting in a high seasonal interception may not result in highest seed yield”
t0“Soybean”
e2“soybeans ( Glycine max (L.) Merr.)”
The same questions in other papers
density · yield · Glycine max (soybean)Positive and negative results
97 papers in the same direction as this paper · 207 in the opposite direction
- positive
- positive
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301 papers more in this group
See all 305 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.