Abstract
S ummary A comparison was made between the rooting conditions used previously in this series of investigations (sandy loam with added fertilizers) and a mixture of vermiculite, sand and gravel with culture solution. The principal effect of vermiculite was to increase the leaf weight by 25% for a given total dry weight. This was mainly compensated for by a lower root weight. The specific leaf area of vermiculite plants was 5% lower than for plants of comparable size and unit leaf rate in sandy loam. The overall result was a rise of 20% in leaf area ratio. The unit leaf rate was unaffected by the rooting condition so there was a resultant 20% increase in relative growth rate over that in sandy loam. The second comparison was with Red light from magnesium arsenate tubes (6000–7000 Å). Red light from germination gave excessively spindly plants, but plants grown initially for 10 days in Daylight‐white grew well subsequently in Red. There was no effect of Red light on leaf weight/total dry weight distribution. The specific leaf area and relative growth rate were marginally lower. Red light was converted 20% more efficiently on an incident energy/apparent assimilation basis.
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Claims 11
Claim · model-written summary
Vermiculite increased leaf weight by 25% at a given total dry weight.
Not reportedTaxonComparator
Verbatim
e0“The principal effect of vermiculite was to increase the leaf weight by 25% for a given total dry weight.”
Claim · model-written summary
Vermiculite plants had lower root weight.
Not reportedTaxonComparator
Verbatim
e0“This was mainly compensated for by a lower root weight.”
e1“vermiculite plants”
Claim · model-written summary
Vermiculite plants had 5% lower specific leaf area than similar sandy-loam plants.
Verbatim
e0“The specific leaf area of vermiculite plants was 5% lower than for plants of comparable size and unit leaf rate in sandy loam.”
Claim · model-written summary
Vermiculite increased leaf area ratio by 20%.
Not reportedComparator
Verbatim
e0“The overall result was a rise of 20% in leaf area ratio.”
e1“vermiculite plants”
Claim · model-written summary
Rooting condition left unit leaf rate unaffected.
- Taxon
- plantsViridiplantaee1
- Treatment
- rooting conditione0
- Outcome
- unit leaf ratee0
- Direction
- unaffectede0
Not reportedComparator
Verbatim
e0“The unit leaf rate was unaffected by the rooting condition”
e1“vermiculite plants”
Claim · model-written summary
Vermiculite increased relative growth rate by 20% over sandy loam.
Verbatim
e0“there was a resultant 20% increase in relative growth rate over that in sandy loam.”
e1“vermiculite plants”
Claim · model-written summary
Red light from germination produced excessively spindly plants.
- Taxon
- plantsViridiplantaee0
- Treatment
- Red light from germinatione0
- Outcome
- excessively spindly plantse0
Not reportedComparatorDirection
Verbatim
e0“Red light from germination gave excessively spindly plants”
Claim · model-written summary
Plants initially grown 10 days under Daylight-white subsequently grew well in Red.
- Taxon
- plantsViridiplantaee0
- Treatment
- Daylight‐whitee0
- Outcome
- grew well subsequently in Rede0
- Qualifier
- 10 dayse0
Not reportedComparatorDirection
Verbatim
e0“plants grown initially for 10 days in Daylight‐white grew well subsequently in Red.”
Claim · model-written summary
Red light had no effect on leaf weight to total dry weight allocation.
- Taxon
- plantsViridiplantaee1
- Treatment
- Red lighte0
- Outcome
- leaf weight/total dry weight distributione0
- Direction
- no effecte0
Not reportedComparator
Verbatim
e0“There was no effect of Red light on leaf weight/total dry weight distribution.”
e1“plants grown initially”
Claim · model-written summary
Red light marginally lowered specific leaf area and relative growth rate.
- Taxon
- plantsViridiplantaee2
- Treatment
- Red lighte1
- Outcome
- specific leaf area and relative growth ratee0
- Direction
- marginally lowere0
Not reportedComparator
Verbatim
e0“The specific leaf area and relative growth rate were marginally lower.”
e1“Red light was converted”
e2“plants grown initially”
Claim · model-written summary
Red light conversion was 20% more efficient on an incident-energy and apparent-assimilation basis.
- Taxon
- plantsViridiplantaee1
- Treatment
- Red lighte0
- Outcome
- convertede0
- Direction
- more efficientlye0
- Value
- 20%e0
Not reportedComparator
Verbatim
e0“Red light was converted 20% more efficiently on an incident energy/apparent assimilation basis.”
e1“plants grown initially”
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