Abstract
Summary Six experiments carried out over 3 years investigated the effects of the date of defoliation of the seed potato crop and the storage temperature of the seed on the growth of the subsequent ware crop. Defoliation of the seed crop in July tended to reduce foliage dry weight particularly at later harvests, and in two experiments in 1974 affected the tuber yield. In one of these experiments defoliation in July resulted in a lower yield than from defoliation in August, while in the other experiment it significantly reduced the bulking rate of the ware crop and gave a lower yield of King Edward at the final harvest. Storage of the seed tubers at low temperature (2–3 °C) tended to increase the amount of foliage produced but only in two out of six experiments was there any effect of storage temperature on yield; in both storage at low temperature gave the lowest yield. There was a significant relationship between the effect of storage temperature on tuber yield and its effect on the time to emergence of 50% of the plants. It is suggested that in these experiments a combination of late planting and weather conditions before emergence reduced the effect of storage temperature on the time to 50% crop emergence and therefore reduced its effect on tuber yield. In 1973 when there was a large effect of storage temperature on yield, there was a significant relationship between the tuber yield of the ware crop and the physiological age of the seed measured as accumulated day degrees above 0 °C from dormancy break to planting.
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Claims 9
Claim · model-written summary
July defoliation tended to reduce foliage dry weight, particularly at later harvests.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- Defoliation of the seed crop in Julye0
- Outcome
- foliage dry weighte0
- Direction
- reducee0
- Qualifier
- particularly at later harvestse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“Defoliation of the seed crop in July tended to reduce foliage dry weight particularly at later harvests”
Claim · model-written summary
In one experiment, July defoliation produced lower tuber yield than August defoliation.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- defoliation in Julye0
- Outcome
- yielde0
- Direction
- lowere0
- Comparator
- defoliation in Auguste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“defoliation in July resulted in a lower yield than from defoliation in August”
Claim · model-written summary
In the other experiment, July defoliation significantly reduced the ware-crop bulking rate.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- defoliation in Julye1
- Outcome
- bulking rate of the ware crope0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“it significantly reduced the bulking rate of the ware crop”
e1“defoliation in July resulted in a lower yield than from defoliation in August”
Claim · model-written summary
In the other experiment, July defoliation gave King Edward a lower yield at final harvest.
- Taxon
- potatoSolanum tuberosumt0
- Material
- King Edwarde0
- Outcome
- yielde0
- Direction
- lowere0
- Qualifier
- at the final harveste0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“gave a lower yield of King Edward at the final harvest”
Claim · model-written summary
Storage at 2–3 °C tended to increase foliage production.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- low temperature (2–3 °C)e0
- Outcome
- amount of foliage producede0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“Storage of the seed tubers at low temperature (2–3 °C) tended to increase the amount of foliage produced”
Claim · model-written summary
Low-temperature seed storage gave the lowest yield in the two experiments where storage temperature affected yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- storage at low temperaturee0
- Outcome
- yielde0
- Direction
- loweste0
- Qualifier
- two out of six experimentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“only in two out of six experiments was there any effect of storage temperature on yield; in both storage at low temperature gave the lowest yield”
Claim · model-written summary
The storage-temperature effect on tuber yield was significantly related to its effect on time to 50% emergence.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- storage temperaturee0
- Outcome
- tuber yielde0
- Qualifier
- time to emergence of 50% of the plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“There was a significant relationship between the effect of storage temperature on tuber yield and its effect on the time to emergence of 50% of the plants”
Claim · model-written summary
The authors suggest late planting and pre-emergence weather weakened the storage-temperature effect on emergence and thus yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- storage temperaturee0
- Outcome
- effect on tuber yielde0
- Qualifier
- a combination of late planting and weather conditions before emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“a combination of late planting and weather conditions before emergence reduced the effect of storage temperature on the time to 50% crop emergence and therefore reduced its effect on tuber yield”
Claim · model-written summary
In 1973, ware-crop tuber yield was significantly related to seed physiological age.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- seede0
- Outcome
- tuber yield of the ware crope0
- Qualifier
- physiological age of the seed measured as accumulated day degrees above 0 °C from dormancy break to plantinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed potato crop”
e0“In 1973 when there was a large effect of storage temperature on yield, there was a significant relationship between the tuber yield of the ware crop and the physiological age of the seed measured as accumulated day degrees above 0 °C from dormancy break to planting”
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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.