Abstract
ABSTRACT Recent developments in cotton (Gossypium hirsutum L.) production technology in the Mississippi River Delta region include drill planting cotton. Production systems that include drill planting cotton are referred to as ultra narrow row (UNR). Ultra narrow row cotton production is a low input system designed to maximize economic returns. Cotton grown under UNR systems is generally lower yielding and lower returning than conventionally spaced cotton, but the inputs and input costs are also generally reduced compared to conventionally spaced cotton production systems. Studies were conducted for five location-years in southeastern and northeastern Arkansas to determine the optimum N-fertilizer rate for UNR cotton. Plant maturity was estimated using nodes above white flower (NAWF) measurements. The NAWF indicated that greater nitrogen (N)-rates delayed maturity of the crop, although differences were not always significant. Lint yields were significantly different in only three of five location-years. Yield responses of UNR cotton tended to maximize with N-treatments between 56 and 84 kg N ha− 1 when significant differences were observed. Plant height, similar to lint yield, was significantly different due to N-treatments in three out of five location-years, and generally increased with increasing N-fertilization up to 112 kg N ha− 1. Boll load was significantly influenced by N-fertilization in only two of five location years. In these two instances, 84 kg N ha− 1 was sufficient to maximize boll load. Boll weight, a component of yield, was determined in the southern Arkansas location only. Significant differences in boll weight due to N-fertilization were found in only two of four years. Boll weight generally increased with increasing N-fertilization.
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Claims 9
Claim · model-written summary
Greater N rates delayed maturity of UNR cotton (NAWF), although differences were not always significant.
- Taxon
- cotton (Gossypium hirsutum L.)
Gossypium hirsutume0 - Treatment
- greater nitrogen (N)-ratese1
- Outcome
- maturity of the crope1
- Direction
- delayede1
- Qualifier
- differences were not always significante1
- Setting
- southeastern and northeastern Arkansase2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e1“The NAWF indicated that greater nitrogen (N)-rates delayed maturity of the crop, although differences were not always significant”
e2“Studies were conducted for five location-years in southeastern and northeastern Arkansas”
Claim · model-written summary
Lint yield responses of UNR cotton tended to maximize at N rates between 56 and 84 kg N/ha when significant differences were observed.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- N-treatmentse1
- Outcome
- Yield responsese1
- Direction
- maximizee1
- Value
- 56 and 84 kg N ha− 1e1
- Qualifier
- when significant differences were observede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e1“Yield responses of UNR cotton tended to maximize with N-treatments between 56 and 84 kg N ha− 1 when significant differences were observed”
Claim · model-written summary
Lint yields differed significantly among N treatments in only three of five location-years.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- N-treatmentse2
- Outcome
- Lint yieldse1
- Qualifier
- in only three of five location-yearse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e1“Lint yields were significantly different in only three of five location-years”
e2“Plant height, similar to lint yield, was significantly different due to N-treatments in three out of five location-years, and generally increased with increasing N-fertilization up to 112 kg N ha− 1”
Claim · model-written summary
Plant height differed significantly among N treatments in three of five location-years.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- N-treatmentse2
- Outcome
- Plant heighte2
- Qualifier
- in three out of five location-yearse2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e2“Plant height, similar to lint yield, was significantly different due to N-treatments in three out of five location-years, and generally increased with increasing N-fertilization up to 112 kg N ha− 1”
Claim · model-written summary
Plant height generally increased with increasing N fertilization up to 112 kg N/ha.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- increasing N-fertilizatione2
- Outcome
- Plant heighte2
- Direction
- increasede2
- Value
- 112 kg N ha− 1e2
- Qualifier
- generallye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e2“Plant height, similar to lint yield, was significantly different due to N-treatments in three out of five location-years, and generally increased with increasing N-fertilization up to 112 kg N ha− 1”
Claim · model-written summary
Boll load was significantly influenced by N fertilization in only two of five location-years.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- N-fertilizatione3
- Outcome
- Boll loade3
- Qualifier
- in only two of five location yearse3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e3“Boll load was significantly influenced by N-fertilization in only two of five location years”
Claim · model-written summary
In two instances, 84 kg N/ha was sufficient to maximize boll load of UNR cotton.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- 84 kg N ha− 1e4
- Outcome
- boll loade4
- Direction
- maximizee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e4“In these two instances, 84 kg N ha− 1 was sufficient to maximize boll load”
Claim · model-written summary
Boll weight differed significantly due to N fertilization in only two of four years, determined in southern Arkansas.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- N-fertilizatione5
- Outcome
- Boll weighte5
- Setting
- southern Arkansase6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e5“Significant differences in boll weight due to N-fertilization were found in only two of four years”
e6“Boll weight, a component of yield, was determined in the southern Arkansas location only”
Claim · model-written summary
Boll weight generally increased with increasing N fertilization.
- Taxon
- cotton (Gossypium hirsutum L.)Gossypium hirsutume0
- Treatment
- increasing N-fertilizatione7
- Outcome
- Boll weighte7
- Direction
- increasede7
- Qualifier
- generallye7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Recent developments in cotton (Gossypium hirsutum L.) production technology”
e7“Boll weight generally increased with increasing N-fertilization”
The same questions in other papers
nitrogen · yield · Gossypium hirsutum (cotton)Positive and negative results
285 papers in the same direction as this paper · 53 in the opposite direction · 4 reporting no difference from an alternative
- no effect
- positive
- positive
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.