Abstract
SUMMARY Sixteen experiments over six seasons (1981–87) compared the growth and yield of up to 16 seed-tuber weights, ranging from 1–5 to 110–120 g, in one second-early and four maincrop varieties. Four of the experiments (1986–87) examined effects in seed tubers from seed crops planted in July; the remaining experiments used seed from crops planted at the normal time, April–May. Effects were similar for seed from the different planting dates. Plants from seed < 5 g (and occasionally up to 15 g) emerged slightly later and produced a smaller crop canopy that those from larger seed. The later emergence from the smallest seed was a consequence of a slower rate of sprout elongation. There were no effects of seed weight above 15 g on stem emergence or growth of the canopy. In 1982, a severe frost completely defoliated all plants in four experiments but within 2 weeks complete plant emergence was re-achieved from all seed weights except the smallest (1–5 g). The results suggest few differences between seed weights > 5 or 10 g in emergence from similar depths of planting or in recovery from frost damage. Tuber yields were little affected by seed weight > 5 or 10 g, even at constant within-row spacings. Consequently, seed rates from 0·59 to 5·4 t/ha produced similar yields and the results suggest considerable economic benefits and potential for using seed tubers of much smaller weight than may be sold under current legislation. The use of small seed tubers from late-planted crops may result in further economies in production costs and reduction in disease in seed tubers.
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Claims 11
Claim · model-written summary
Effects of seed tuber weight were similar for different seed crop planting dates.
- Taxon
- potato
Solanum tuberosumt0 - Outcome
- Effects were similare0
- Comparator
- different planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects were similar for seed from the different planting dates.”
t0“potato”
Claim · model-written summary
Plants from seed below 5 g, occasionally up to 15 g, emerged slightly later than plants from larger seed.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- seed < 5 ge0
- Outcome
- emergede0
- Direction
- slightly latere0
- Comparator
- larger seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants from seed < 5 g (and occasionally up to 15 g) emerged slightly later and produced a smaller crop canopy that those from larger seed.”
t0“potato”
Claim · model-written summary
Plants from small seed produced a smaller crop canopy than those from larger seed.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- seed < 5 ge0
- Outcome
- crop canopye0
- Direction
- smallere0
- Comparator
- larger seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants from seed < 5 g (and occasionally up to 15 g) emerged slightly later and produced a smaller crop canopy that those from larger seed.”
t0“potato”
Claim · model-written summary
The later emergence from the smallest seed resulted from slower sprout elongation.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- later emergencee0
- Qualifier
- slower rate of sprout elongatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The later emergence from the smallest seed was a consequence of a slower rate of sprout elongation.”
t0“potato”
Claim · model-written summary
Seed weight above 15 g did not affect stem emergence.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- seed weight above 15 ge0
- Outcome
- stem emergencee0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no effects of seed weight above 15 g on stem emergence or growth of the canopy.”
t0“potato”
Claim · model-written summary
Seed weight above 15 g did not affect canopy growth.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- seed weight above 15 ge0
- Outcome
- growth of the canopye0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no effects of seed weight above 15 g on stem emergence or growth of the canopy.”
t0“potato”
Claim · model-written summary
After severe frost, complete emergence returned within two weeks for all seed weights except 1–5 g.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- complete plant emergencee0
- Value
- 2 weekse0
- Qualifier
- except the smallest (1–5 g)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“within 2 weeks complete plant emergence was re-achieved from all seed weights except the smallest (1–5 g).”
t0“potato”
Claim · model-written summary
Tuber yields were little affected by seed weight above 5 or 10 g.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- seed weight > 5 or 10 ge0
- Outcome
- Tuber yieldse0
- Direction
- little affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tuber yields were little affected by seed weight > 5 or 10 g, even at constant within-row spacings.”
t0“potato”
Claim · model-written summary
Seed rates from 0·59 to 5·4 t/ha gave similar yields.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- seed rates from 0·59 to 5·4 t/hae0
- Outcome
- yieldse0
- Direction
- similare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed rates from 0·59 to 5·4 t/ha produced similar yields”
t0“potato”
Claim · model-written summary
The authors suggest economic benefits from smaller seed tubers.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- using seed tubers of much smaller weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the results suggest considerable economic benefits and potential for using seed tubers of much smaller weight than may be sold under current legislation.”
t0“potato”
Claim · model-written summary
Small seed tubers from late-planted crops may reduce production costs and disease in seed tubers.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- The use of small seed tubers from late-planted cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of small seed tubers from late-planted crops may result in further economies in production costs and reduction in disease in seed tubers.”
t0“potato”
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