Abstract
An increase in calcium concentration of potato tuber tissue has been shown to reduce soft rot severity and the incidence of internal physiological defects. Higher tuber calcium also seems to increase sprout vigor and maintain apical dominance by reducing subapical necrosis and sprout tip death. Preemergent applications of calcium at a rate of 0 and 26.5 kg·ha –1 from ammonium nitrate (PreAmNit), ammonium nitrate plus calcium nitrate (PreCaN), or calcium chloride plus calcium nitrate plus urea (PreCUC). A group of post-emergent split calcium nitrate plus calcium chloride plus urea (PostCUC) applications beginning with hilling and proceeding at 3, 6, and 8 weeks after hilling were also made at a rate of 56 kg·ha –1 calcium at each application time. From visual ratings of stand quality taken 64 days after hilling, we found plants receiving a preemergent application of nutrients or PostCUC had higher stand ratings than paired control plots. Internal tuber quality ratings revealed less internal brown spot in the PostCUC application in 168–364-g tubers. Yield of 112–168-g tubers was greatest from plants treated with PreCaN or PreCUC followed by PostCUC. PreAmNit plots had higher culls than the PreCUC plots. The non-split ammonium nitrate control (all nitrogen by hilling) produced a higher number of B-sized tubers than the PostCUC treatment. Also the PreAmNit+PostCUC had more B-sized tubers than PreCaN+PostCUC. In general the PostCUC treatment produced fewer small tubers and more large tubers than other treatments. These results suggest application of a small amount of calcium prior to emergence but after the sprouts have begun to develop improves seed performance. Furthermore these data show that supplemental calcium application during the season may improve tuber grade.
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Claims 10
Claim · model-written summary
Preemergent nutrients or PostCUC increased stand ratings versus controls.
- Taxon
- potato
Solanum tuberosume7 - Treatment
- preemergent application of nutrients or PostCUCe0
- Outcome
- stand ratingse0
- Direction
- highere0
- Comparator
- paired control plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants receiving a preemergent application of nutrients or PostCUC had higher stand ratings than paired control plots.”
e7“potato tuber tissue”
Claim · model-written summary
PostCUC reduced internal brown spot in 168–364-g tubers.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- PostCUCe0
- Outcome
- internal brown spote0
- Direction
- lesse0
- Qualifier
- 168–364-g tuberse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less internal brown spot in the PostCUC application in 168–364-g tubers.”
e7“potato tuber tissue”
Claim · model-written summary
PreCaN or PreCUC followed by PostCUC gave the greatest yield of 112–168-g tubers.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- PreCaN or PreCUC followed by PostCUCe0
- Outcome
- Yield of 112–168-g tuberse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of 112–168-g tubers was greatest from plants treated with PreCaN or PreCUC followed by PostCUC.”
e7“potato tuber tissue”
Claim · model-written summary
PreAmNit plots had more culls than PreCUC plots.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- PreAmNite0
- Outcome
- cullse0
- Direction
- highere0
- Comparator
- PreCUC plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PreAmNit plots had higher culls than the PreCUC plots.”
e7“potato tuber tissue”
Claim · model-written summary
Nonsplit ammonium nitrate produced more B-sized tubers than PostCUC.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- non-split ammonium nitrate controle0
- Outcome
- number of B-sized tuberse0
- Direction
- highere0
- Comparator
- PostCUC treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The non-split ammonium nitrate control (all nitrogen by hilling) produced a higher number of B-sized tubers than the PostCUC treatment.”
e7“potato tuber tissue”
Claim · model-written summary
PreAmNit plus PostCUC produced more B-sized tubers than PreCaN plus PostCUC.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- PreAmNit+PostCUCe0
- Outcome
- B-sized tuberse0
- Direction
- moree0
- Comparator
- PreCaN+PostCUCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PreAmNit+PostCUC had more B-sized tubers than PreCaN+PostCUC.”
e7“potato tuber tissue”
Claim · model-written summary
PostCUC produced fewer small tubers than other treatments.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- PostCUC treatmente0
- Outcome
- small tuberse0
- Direction
- fewere0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the PostCUC treatment produced fewer small tubers and more large tubers than other treatments.”
e7“potato tuber tissue”
Claim · model-written summary
PostCUC produced more large tubers than other treatments.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- PostCUC treatmente0
- Outcome
- large tuberse0
- Direction
- moree0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the PostCUC treatment produced fewer small tubers and more large tubers than other treatments.”
e7“potato tuber tissue”
Claim · model-written summary
Authors suggest a small calcium application before emergence improves seed performance.
- Taxon
- potatoSolanum tuberosume7
- Outcome
- improves seed performancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of a small amount of calcium prior to emergence but after the sprouts have begun to develop improves seed performance.”
e7“potato tuber tissue”
Claim · model-written summary
Authors conclude supplemental calcium during the season may improve tuber grade.
- Taxon
- potatoSolanum tuberosume7
- Outcome
- may improve tuber gradee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplemental calcium application during the season may improve tuber grade.”
e7“potato tuber tissue”
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108 papers in the same direction as this paper · 20 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
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See all 132 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.