Abstract
Tillage and N fertilization influence cotton ( Gosspium hirsutum L.) growth and yield. The objective of the study was to evaluate the influence of two tillage systems (conventional tillage [CT] and strip‐till [ST]) and four N rates (0, 67, 134, and 202 kg N ha −1 ) on growth, development, and yield of ‘DP 5409’ cotton following wheat ( Triticum aestivum L.). The experiment was conducted at the University of Florida's North Florida Research and Education Center in Quincy, FL, in 1995–1997. Lint yields, plant height, boll no. plant −1 , and boll no. m −2 varied across years. With every 1 kg N ha −1 applied to cotton, lint yields increased by 1.74 and 1.53 kg ha −1 in 1996, and 2.76 and 1.76 kg ha −1 in 1997 for CT and ST, respectively. In 1995, maximum lint yields were estimated with 105 kg N ha −1 for CT. Averaged across years, cotton lint yield increase with N application greater than 67 kg ha −1 was not significant and tillage did not influence lint yields. Plant height, boll no. plant −1 , and boll no. m −2 generally increased with increasing N rates, except for boll no. m −2 in the ST system in 1995. Greatest boll weight and lint weight boll −1 were obtained with the application of 134 kg N ha −1 . Compared with CT, ST reduced boll no. plant −1 and increased boll no. m −2 . Tillage did not influence plant height, boll weight, and lint weight boll −1 . These results indicate that cotton can be grown successfully in ST and that yields may not increase significantly with rates >67 kg N ha −1
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Claims 15
Claim · model-written summary
Lint yields, plant height, boll number per plant and boll number per square metre varied across years.
- Taxon
- Cotton
Gossypium hirsutumt0 - Outcome
- Lint yields, plant height, boll no. plant −1 , and boll no. m −2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lint yields, plant height, boll no. plant −1 , and boll no. m −2 varied across years”
t0“Cotton”
Claim · model-written summary
In 1996, each 1 kg N ha-1 applied increased cotton lint yield by 1.74 kg ha-1 under conventional tillage (CT).
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 1 kg N ha −1 appliede0
- Outcome
- lint yieldse0
- Direction
- increasede0
- Value
- 1.74e0
- Qualifier
- 1996e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With every 1 kg N ha −1 applied to cotton, lint yields increased by 1.74 and 1.53 kg ha −1 in 1996, and 2.76 and 1.76 kg ha −1 in 1997 for CT and ST, respectively”
Claim · model-written summary
In 1996, each 1 kg N ha-1 applied increased cotton lint yield by 1.53 kg ha-1 under strip-till (ST).
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 1 kg N ha −1 appliede0
- Outcome
- lint yieldse0
- Direction
- increasede0
- Value
- 1.53e0
- Qualifier
- 1996e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With every 1 kg N ha −1 applied to cotton, lint yields increased by 1.74 and 1.53 kg ha −1 in 1996, and 2.76 and 1.76 kg ha −1 in 1997 for CT and ST, respectively”
Claim · model-written summary
In 1997, each 1 kg N ha-1 applied increased cotton lint yield by 2.76 kg ha-1 under conventional tillage (CT).
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 1 kg N ha −1 appliede0
- Outcome
- lint yieldse0
- Direction
- increasede0
- Value
- 2.76e0
- Qualifier
- 1997e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With every 1 kg N ha −1 applied to cotton, lint yields increased by 1.74 and 1.53 kg ha −1 in 1996, and 2.76 and 1.76 kg ha −1 in 1997 for CT and ST, respectively”
Claim · model-written summary
In 1997, each 1 kg N ha-1 applied increased cotton lint yield by 1.76 kg ha-1 under strip-till (ST).
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 1 kg N ha −1 appliede0
- Outcome
- lint yieldse0
- Direction
- increasede0
- Value
- 1.76e0
- Qualifier
- 1997e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With every 1 kg N ha −1 applied to cotton, lint yields increased by 1.74 and 1.53 kg ha −1 in 1996, and 2.76 and 1.76 kg ha −1 in 1997 for CT and ST, respectively”
Claim · model-written summary
In 1995, maximum lint yields under conventional tillage were estimated at 105 kg N ha-1.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- maximum lint yieldse0
- Value
- 105 kg N ha −1e0
- Qualifier
- 1995e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1995, maximum lint yields were estimated with 105 kg N ha −1 for CT”
t0“Cotton”
Claim · model-written summary
Averaged across years, the increase in cotton lint yield with N application above 67 kg ha-1 was not significant.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- N application greater than 67 kg ha −1e0
- Outcome
- lint yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Averaged across years, cotton lint yield increase with N application greater than 67 kg ha −1 was not significant”
Claim · model-written summary
Tillage did not influence cotton lint yields.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- tillagee0
- Outcome
- lint yieldse0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tillage did not influence lint yields”
t0“Cotton”
Claim · model-written summary
Plant height, boll number per plant and boll number per square metre generally increased with increasing N rates, except boll number per square metre in the ST system in 1995.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- increasing N ratese0
- Outcome
- Plant height, boll no. plant −1 , and boll no. m −2e0
- Direction
- increasede0
- Qualifier
- except for boll no. m −2 in the ST system in 1995e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, boll no. plant −1 , and boll no. m −2 generally increased with increasing N rates, except for boll no. m −2 in the ST system in 1995”
t0“Cotton”
Claim · model-written summary
Greatest boll weight and lint weight per boll were obtained with application of 134 kg N ha-1.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- application of 134 kg N ha −1e0
- Outcome
- boll weight and lint weight boll −1e0
- Direction
- Greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greatest boll weight and lint weight boll −1 were obtained with the application of 134 kg N ha −1”
t0“Cotton”
Claim · model-written summary
Compared with conventional tillage, strip-till reduced boll number per plant.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- STe0
- Outcome
- boll no. plant −1e0
- Direction
- reducede0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CT, ST reduced boll no. plant −1 and increased boll no. m −2”
t0“Cotton”
Claim · model-written summary
Compared with conventional tillage, strip-till increased boll number per square metre.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- STe0
- Outcome
- boll no. m −2e0
- Direction
- increasede0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CT, ST reduced boll no. plant −1 and increased boll no. m −2”
t0“Cotton”
Claim · model-written summary
Tillage did not influence plant height, boll weight, or lint weight per boll.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Tillagee0
- Outcome
- plant height, boll weight, and lint weight boll −1e0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage did not influence plant height, boll weight, and lint weight boll −1”
t0“Cotton”
Claim · model-written summary
Cotton can be grown successfully in strip-till.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- grown successfully in STe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton can be grown successfully in ST”
Claim · model-written summary
Cotton yields may not increase significantly with N rates above 67 kg N ha-1.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- yields may not increase significantlye0
- Qualifier
- rates >67 kg N ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields may not increase significantly with rates >67 kg N ha −1”
t0“Cotton”
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