Abstract
Abstract The quantity and availability of N from green manures will considerably affect the N management of a succeeding cotton ( Gossypium hirsutum L.) crop. This study was conducted to determine the N supplying capacity of crimson clover ( Trifolium incarnatum L.), Austrian winter pea [ Pisum sativum subsp. arvense (L.) Poir.], and rye ( Secale cereale L.) to cotton and their influence on cotton yield and fiber properties. Green manure treatments (and a fallow check) with fertilizer N levels of 0, 56, 112, and 168 kg ha −1 were compared for 3 yr on a Norfolk loamy sand (fine‐loamy, siliceous, thermic Typic Kandiudult). Soil moisture at planting was similar among the four green manuretr eatments. At the 0 N level, the legumes generally had higher soil NO 3 ‐N than rye or fallow. Cotton grown following clover and pea with 0 kg ha −1 added N had petiole NO 3 ‐N levels similar to those of rye and fallow with 56 kg N ha −1 . Fertilizer N had no influence on cotton yield in the pea winter cover treatment. A quadratic regression equation best described the lint yield response following clover. For both rye and fallow treatments, yield plateaued at 56 kg N ha −1 . Green manures had little influence on fiber properties. The results indicate that legumes supply adequate but not excessive N for modern cotton production and that incorporation of rye into the production system does not affect N fertilization requirements.
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Claims 9
Claim · model-written summary
Soil moisture at planting was similar across green manure treatments.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- green manuretr eatmentse0
- Outcome
- Soil moisture at plantinge0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil moisture at planting was similar among the four green manuretr eatments”
e1“cotton ( Gossypium hirsutum L.) crop”
Claim · model-written summary
At zero N, legumes generally produced higher soil nitrate N than rye or fallow.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- legumese0
- Outcome
- soil NO 3 ‐Ne0
- Direction
- highere0
- Qualifier
- 0 N levele0
- Comparator
- rye or fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the 0 N level, the legumes generally had higher soil NO 3 ‐N than rye or fallow”
e1“cotton ( Gossypium hirsutum L.) crop”
Claim · model-written summary
Cotton after clover or pea with no N had petiole nitrate N comparable to rye or fallow with 56 kg N.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- following clover and pea with 0 kg ha −1 added Ne0
- Outcome
- petiole NO 3 ‐N levelse0
- Direction
- similare0
- Qualifier
- 56 kg N ha −1e0
- Comparator
- rye and fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton grown following clover and pea with 0 kg ha −1 added N had petiole NO 3 ‐N levels similar to those of rye and fallow with 56 kg N ha −1”
Claim · model-written summary
Fertilizer N did not influence cotton yield after pea cover.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Fertilizer Ne0
- Outcome
- cotton yielde0
- Direction
- no influencee0
- Qualifier
- pea winter cover treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N had no influence on cotton yield in the pea winter cover treatment”
Claim · model-written summary
A quadratic regression best described cotton lint yield after clover.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- lint yield responsee0
- Comparator
- clovere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A quadratic regression equation best described the lint yield response following clover”
e1“their influence on cotton yield”
Claim · model-written summary
Cotton yield plateaued at 56 kg N ha −1 after rye or fallow.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- rye and fallow treatmentse0
- Outcome
- yielde0
- Direction
- plateauede0
- Value
- 56 kg N ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both rye and fallow treatments, yield plateaued at 56 kg N ha −1”
e1“their influence on cotton yield”
Claim · model-written summary
Green manures had little influence on cotton fiber properties.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Green manurese0
- Outcome
- fiber propertiese0
- Direction
- little influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green manures had little influence on fiber properties”
e1“cotton yield and fiber properties”
Claim · model-written summary
The authors conclude legumes supply adequate but not excessive N for cotton production.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- legumese0
- Outcome
- adequate but not excessive Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“legumes supply adequate but not excessive N for modern cotton production”
Claim · model-written summary
The authors conclude rye incorporation does not alter cotton N fertilization requirements.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- incorporation of ryee0
- Outcome
- N fertilization requirementse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incorporation of rye into the production system does not affect N fertilization requirements”
e1“cotton production”
The same questions in other papers
fertilization · quality: grain · Gossypium hirsutum (cotton)Positive and negative results
46 papers in the same direction as this paper · 82 in the opposite direction
- positive
- positive
- no effect
125 papers more in this group
See all 129 papers →fertilization · yield · Gossypium hirsutum (cotton)Positive and negative results
52 papers in the same direction as this paper · 497 in the opposite direction
- positive
- positive
- positive
546 papers more in this group
See all 550 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.