Abstract
Abstract Narrow row planting of cotton ( Gossypium hirsutum L.) has the potential for improving yield and production efficiency. Fertilizer needs and other production technology for narrow row cotton have received little attention, especially the nitrogen (N) requirement. The objective of this study was to ascertain if N fertilizer, narrow row, and high population, has any effect on growth and yield of dryland cotton. The relationship between petiole NO − 3 ‐N at various stages of development and yields was also investigated. Row spacing (25, 51, and 76‐cm), plant populations (123,550 and 173,000 plants/ha), and N rate (0, 45, and 90 kg/ha) variables were placed in a factorial arrangement of a randomized, complete block design with four replications. Low N treatments (45 kg/ha) produced no significant change in yield, but higher N rates reduced yield significantly. The 25 and 51‐cm row spacings produced significantly higher yield than 76‐cm rows. The range of plant populations used did not materially affect yield, but there was a significant N‐population interaction. Narrow rows reduced plant height. NO − 3 ‐N levels in petioles increased with increased N rate, being highest at the square stage of plant growth and decreasing sharply at the flower and boll stages. There was no significant correlation between petiole NO − 3 ‐N and yield. Narrow row cotton can result in higher yield and is especially of interest where the length of growing season is not optimum.
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Claims 12
Claim · model-written summary
The 45 kg/ha nitrogen treatment did not significantly change cotton yield.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- 45 kg/hae0
- Outcome
- yielde0
- Direction
- no significant changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low N treatments (45 kg/ha) produced no significant change in yield”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Higher nitrogen rates significantly reduced cotton yield.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- higher N ratese0
- Outcome
- yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher N rates reduced yield significantly”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton yield was significantly higher at 25 cm row spacing than at 76 cm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 25 and 51‐cm row spacings produced significantly higher yield than 76‐cm rows.”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton yield was significantly higher at 51 cm row spacing than at 76 cm.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- 51‐cm row spacingse0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- 76‐cm rowse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 25 and 51‐cm row spacings produced significantly higher yield than 76‐cm rows.”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Population range did not materially affect cotton yield.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- range of plant populationse0
- Outcome
- yielde0
- Direction
- did not materially affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The range of plant populations used did not materially affect yield”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Nitrogen and population had a significant interaction for cotton yield.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- N‐population interactione0
- Outcome
- yielde2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a significant N‐population interaction”
e1“cotton ( Gossypium hirsutum L.)”
e2“did not materially affect yield”
Claim · model-written summary
Narrow rows reduced cotton plant height.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Narrow rowse0
- Outcome
- plant heighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Narrow rows reduced plant height.”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Increasing nitrogen rate increased cotton petiole nitrate nitrogen levels.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- increased N ratee0
- Outcome
- NO − 3 ‐N levels in petiolese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO − 3 ‐N levels in petioles increased with increased N rate”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton petiole nitrate nitrogen was highest at the square stage.
- Taxon
- cottonGossypium hirsutume2
- Organ / stage
- square stagee0
- Outcome
- NO − 3 ‐N levels in petiolese1
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“being highest at the square stage of plant growth”
e1“NO − 3 ‐N levels in petioles”
e2“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton petiole nitrate nitrogen decreased sharply at flower and boll stages.
- Taxon
- cottonGossypium hirsutume2
- Organ / stage
- flower and boll stagese0
- Outcome
- NO − 3 ‐N levels in petiolese1
- Direction
- decreasing sharplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing sharply at the flower and boll stages”
e1“NO − 3 ‐N levels in petioles”
e2“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Cotton petiole nitrate nitrogen and yield were not significantly correlated.
- Taxon
- cottonGossypium hirsutume1
- Organ / stage
- petiolee0
- Outcome
- yielde0
- Direction
- no significant correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant correlation between petiole NO − 3 ‐N and yield.”
e1“cotton ( Gossypium hirsutum L.)”
Claim · model-written summary
Narrow row cotton is recommended for higher yields where the growing season is short.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Narrow rowe0
- Outcome
- higher yielde0
- Qualifier
- length of growing season is not optimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Narrow row cotton can result in higher yield and is especially of interest where the length of growing season is not optimum.”
The same questions in other papers
nitrogen · yield · Gossypium hirsutum (cotton)Positive and negative results
56 papers in the same direction as this paper · 286 in the opposite direction
- positive
- positive
- no effect
339 papers more in this group
See all 343 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.