Abstract
Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.). The POCU was a 3:1 mixture of 70-day and 50-day release formulations, respectively, based on historical soil temperatures at the site. The study compared five banded nitrogen (N) rates (110, 155, 200, 245, and 290 kg·ha -1 N) as a split application of urea applied at emergence and hilling, vs. POCU applied at planting. All plants received an additional 30 kg·ha -1 N as monoammonium phosphate band-applied at planting. Yields were higher in 1996 because of cooler temperatures and poor tuber set in 1997. Total and marketable yields averaged, respectively, 3.9 and 3.3 Mg·ha -1 higher with POCU than with urea. Total yield was not affected by rate of N application regardless of source, but marketable yield increased linearly with N rate. The yield of marketable tubers larger than 170 g increased linearly with N rate in both years. Gross return was 10% higher with POCU than with urea, but estimated net return showed a significant sourc × N rate interaction. The net return increased by $3.13 per kg of urea-N applied, but there was no significant change across POCU application rates.
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Claims 10
Claim · model-written summary
Total yield averaged 3.9 Mg·ha-1 higher with POCU than with urea.
- Taxon
- Solanum tuberosum
Solanum tuberosume0 - Treatment
- POCUe1
- Outcome
- Total and marketable yieldse1
- Direction
- highere1
- Value
- 3.9e1
- Comparator
- ureae1
- Setting
- Becker, Minn.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e1“Total and marketable yields averaged, respectively, 3.9 and 3.3 Mg·ha -1 higher with POCU than with urea”
Claim · model-written summary
Marketable yield averaged 3.3 Mg·ha-1 higher with POCU than with urea.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- POCUe1
- Outcome
- marketable yieldse1
- Direction
- highere1
- Value
- 3.3e1
- Comparator
- ureae1
- Setting
- Becker, Minn.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e1“Total and marketable yields averaged, respectively, 3.9 and 3.3 Mg·ha -1 higher with POCU than with urea”
Claim · model-written summary
Total yield was not affected by N application rate, regardless of N source.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- rate of N applicatione2
- Outcome
- Total yielde2
- Direction
- not affectede2
- Qualifier
- regardless of sourcee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e2“Total yield was not affected by rate of N application regardless of source, but marketable yield increased linearly with N rate”
Claim · model-written summary
Marketable yield increased linearly with N rate.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- N ratee2
- Outcome
- marketable yielde2
- Direction
- increasede2
- Qualifier
- linearlye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e2“Total yield was not affected by rate of N application regardless of source, but marketable yield increased linearly with N rate”
Claim · model-written summary
Yield of marketable tubers larger than 170 g increased linearly with N rate in both years.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- N ratee3
- Outcome
- yield of marketable tubers larger than 170 ge3
- Direction
- increasede3
- Qualifier
- in both yearse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e3“The yield of marketable tubers larger than 170 g increased linearly with N rate in both years”
Claim · model-written summary
Gross return was 10% higher with POCU than with urea.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- POCUe4
- Outcome
- Gross returne4
- Direction
- highere4
- Value
- 10%e4
- Comparator
- ureae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e4“Gross return was 10% higher with POCU than with urea”
Claim · model-written summary
Net return increased by $3.13 per kg of urea-N applied.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- urea-Ne5
- Outcome
- net returne5
- Direction
- increasede5
- Value
- $3.13 per kg of urea-Ne5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e5“The net return increased by $3.13 per kg of urea-N applied, but there was no significant change across POCU application rates”
Claim · model-written summary
Net return showed no significant change across POCU application rates.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- POCU application ratese5
- Outcome
- net returne5
- Direction
- no significant changee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e5“The net return increased by $3.13 per kg of urea-N applied, but there was no significant change across POCU application rates”
Claim · model-written summary
Estimated net return showed a significant source × N rate interaction.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Treatment
- sourc × N ratee6
- Outcome
- net returne6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e6“estimated net return showed a significant sourc × N rate interaction”
Claim · model-written summary
Yields were higher in 1996 than in 1997, attributed to cooler temperatures and poor tuber set in 1997.
- Taxon
- Solanum tuberosumSolanum tuberosume0
- Outcome
- Yieldse7
- Direction
- highere7
- Qualifier
- because of cooler temperatures and poor tuber set in 1997e7
- Setting
- 1996e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field studies were conducted on a Hubbard loamy sand (sandy, mixed, frigid Entic Hapludoll) during 1996 and 1997 at Becker, Minn., to evaluate the effect of a polyolefin-coated urea (POCU) fertilizer (Meister, Chisso Co., Japan) on yield and quality of irrigated `Russet Burbank' potatoes ( Solanum tuberosum L.)”
e7“Yields were higher in 1996 because of cooler temperatures and poor tuber set in 1997”
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See all 28 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.