Abstract
This study examined the influence of irrigation, soil nitrogen (N) levels and seed piece spacing on the yields and tuber size distribution of Norland, Russet Burbank and Shepody potatoes over three seasons at two sites in central Saskatchewan. The crops were grown under standard irrigated conditions or on dryland with in-row spacings of 15, 23 or 30 cm and total N levels of 200 or 300 kg ha −1 as either preplant or split applications. Irrigation greatly enhanced yields of all tuber size categories in the drier years but had less effect if seasonal precipitation reached or exceeded normal levels. Smaller size tubers formed a greater proportion of the total yield in crops exposed to drought stress. Norland was less affected by drought than the later-maturing cultivars. Yield responses to N were limited to situations where soil moisture was abundant or crop demand for nutrients was increased by close in-row spacings. Close in-row spacing increased total yields in some cases, while in others it resulted in a reduction in tuber size with little effect on overall yields. Yields for the cultivar Norland were less affected by seed piece spacing than yields for Russet Burbank or Shepody. Key words: Solanum tuberosum, drop seed, spacing, fertility
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Claims 8
Claim · model-written summary
Irrigation raised yields of all tuber sizes in dry years but had less effect with normal precipitation.
- Taxon
- potatoes
Solanum tuberosumt0 - Treatment
- Irrigatione0
- Outcome
- yields of all tuber size categoriese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation greatly enhanced yields of all tuber size categories in the drier years but had less effect if seasonal precipitation reached or exceeded normal levels.”
t0“seed potatoes”
Claim · model-written summary
Drought increased the share of smaller tubers.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- drought stresse0
- Outcome
- Smaller size tubers formed a greater proportion of the total yielde0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Smaller size tubers formed a greater proportion of the total yield in crops exposed to drought stress.”
t0“seed potatoes”
Claim · model-written summary
Norland was less affected by drought than later cultivars.
- Taxon
- potatoesSolanum tuberosumt0
- Material
- Norlande0
- Outcome
- less affected by droughte0
- Direction
- less affectede0
- Comparator
- later-maturing cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Norland was less affected by drought than the later-maturing cultivars.”
t0“seed potatoes”
Claim · model-written summary
Nitrogen responses occurred only when moisture was abundant or close spacing increased demand.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Ne0
- Outcome
- Yield responses to Ne0
- Qualifier
- soil moisture was abundant or crop demand for nutrients was increased by close in-row spacingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield responses to N were limited to situations where soil moisture was abundant or crop demand for nutrients was increased by close in-row spacings.”
t0“seed potatoes”
Claim · model-written summary
Close in-row spacing increased total yields in some cases.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Close in-row spacinge0
- Outcome
- total yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Close in-row spacing increased total yields in some cases, while in others it resulted in a reduction in tuber size with little effect on overall yields.”
t0“seed potatoes”
Claim · model-written summary
Close in-row spacing reduced tuber size in some cases.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Close in-row spacinge0
- Outcome
- tuber sizee0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Close in-row spacing increased total yields in some cases, while in others it resulted in a reduction in tuber size with little effect on overall yields.”
t0“seed potatoes”
Claim · model-written summary
Close spacing had little effect on overall yields in cases with smaller tubers.
- Taxon
- potatoesSolanum tuberosumt0
- Treatment
- Close in-row spacinge0
- Outcome
- overall yieldse0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Close in-row spacing increased total yields in some cases, while in others it resulted in a reduction in tuber size with little effect on overall yields.”
t0“seed potatoes”
Claim · model-written summary
Norland yield was less affected by seed piece spacing than Russet Burbank or Shepody.
- Taxon
- potatoesSolanum tuberosumt0
- Material
- Norlande0
- Outcome
- Yieldse0
- Direction
- less affectede0
- Comparator
- Russet Burbank or Shepodye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields for the cultivar Norland were less affected by seed piece spacing than yields for Russet Burbank or Shepody.”
t0“seed potatoes”
The same questions in other papers
irrigation · yield · Solanum tuberosum (potato)Results differ
74 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
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See all 92 papers →density · yield · Solanum tuberosum (potato)Positive and negative results
35 papers in the same direction as this paper · 8 in the opposite direction
- no effect
- negative
- negative
40 papers more in this group
See all 44 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.