Abstract
Studies were made in 1954, 1955, and 1956 of the effects of various quantities of normal sunlight, obtained by the use of shade structures, on growth and grain production of three corn hybrids: Illinois 972A, Hy2 ✕ Oh41 (tolerant of high rates of planting), and WF9 ✕ C103 (intolerant of high rates of planting). The light treatlnents in 1954 were 100% (control), 70, 40, and 10%; 1955 and 1956, additional treatments of 30 and 20% were used. Shading was initiated in 1954, 1955, and 1956 on July 2, July 5, and June 8 thus providing 90, 72, and 113 days of treatment, respectively. In general, there was a significant decrease in measured components (grain, stover, total protein, total oil, etc.) as light was decreased. With minor exceptions, e.g., height, reduction of light by even 30% caused a decrease in production of plant material. Of signal importance is the essentially linear reduction in total plant (grain and stover) protein with decrease in light. Based on grain yields, Hy2 ✕ Oh41 proved to be more tolerant of low light levels than did WF9 ✕ C103 when shade treatments were imposed in mid‐season at a time when mutual shading becomes intense in dense plant populations.
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Claims 5
Claim · model-written summary
Decreasing light significantly decreased grain and stover production.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- light was decreasede0
- Outcome
- grain, stovere0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, there was a significant decrease in measured components (grain, stover, total protein, total oil, etc.) as light was decreased.”
e1“corn hybrids”
Claim · model-written summary
Decreasing light significantly decreased total protein and total oil.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- light was decreasede0
- Outcome
- total protein, total oile0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, there was a significant decrease in measured components (grain, stover, total protein, total oil, etc.) as light was decreased.”
e1“corn hybrids”
Claim · model-written summary
A 30% reduction in light decreased plant material production, with minor exceptions including height.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- reduction of light by even 30%e0
- Outcome
- production of plant materiale0
- Direction
- decreasee0
- Qualifier
- With minor exceptions, e.g., heighte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With minor exceptions, e.g., height, reduction of light by even 30% caused a decrease in production of plant material.”
e1“corn hybrids”
Claim · model-written summary
Total plant protein decreased approximately linearly with decreasing light.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- decrease in lighte0
- Outcome
- total plant (grain and stover) proteine0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the essentially linear reduction in total plant (grain and stover) protein with decrease in light.”
e1“corn hybrids”
Claim · model-written summary
Hy2 ✕ Oh41 was more tolerant of low light than WF9 ✕ C103 based on grain yield.
- Taxon
- cornZea mays subsp. mayse1
- Material
- Hy2 ✕ Oh41e0
- Outcome
- tolerant of low light levelse0
- Direction
- more tolerante0
- Qualifier
- when shade treatments were imposed in mid‐seasone0
- Comparator
- WF9 ✕ C103e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Based on grain yields, Hy2 ✕ Oh41 proved to be more tolerant of low light levels than did WF9 ✕ C103 when shade treatments were imposed in mid‐season”
e1“corn hybrids”
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