Abstract
Abstract Despite rapid expansion of organic tobacco ( Nicotiana tabacum L.) production in the US, limited research has been conducted comparing the numerous organic fertilizer sources. Organic flue‐cured tobacco traditionally relies on feather meal as the organic N fertility source, as it is readily available, but there is limited information on alternative organic N fertilizers. The objective of this research was to investigate seven different organic fertilizer sources to determine their effect on the growth and development of flue‐cured tobacco. From 2018 to 2019, field sites were established at four locations in North Carolina. Fertilizer treatments included sodium nitrate, composted layer manure, feather meal, corn gluten, soy protein, blood meal, and seabird guano. Both years, these organic N treatments were banded at sidedress (10 d after transplanting) at a rate of 78 kg total N ha −1 . Sodium nitrate resulted in higher foliar nitrate‐N concentration than composted layer manure at layby and higher cured leaf yield compared with feather meal and composted layer manure. However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure. While feather meal and composted layer manure resulted in a 10 and 11% reduction in yield, respectively, there was no significant difference in tobacco value among treatments. Our results suggest that organic tobacco farmers have other options for N selection beyond the current feather meal standard.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Sodium nitrate gave higher foliar nitrate-N concentration than composted layer manure at layby.
- Taxon
- Nicotiana tabacum L.
Nicotiana tabacumt0 - Treatment
- Sodium nitratee0
- Outcome
- foliar nitrate‐N concentratione0
- Direction
- highere0
- Comparator
- composted layer manuree0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium nitrate resulted in higher foliar nitrate‐N concentration than composted layer manure at layby and higher cured leaf yield compared with feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
Sodium nitrate gave higher cured leaf yield than feather meal.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- Sodium nitratee0
- Outcome
- cured leaf yielde0
- Direction
- highere0
- Comparator
- feather meale0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium nitrate resulted in higher foliar nitrate‐N concentration than composted layer manure at layby and higher cured leaf yield compared with feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
Sodium nitrate gave higher cured leaf yield than composted layer manure.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- Sodium nitratee0
- Outcome
- cured leaf yielde0
- Direction
- highere0
- Comparator
- composted layer manuree0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium nitrate resulted in higher foliar nitrate‐N concentration than composted layer manure at layby and higher cured leaf yield compared with feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
soy protein had similar yield response to sodium nitrate.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- soy proteine0
- Outcome
- yield responsee0
- Direction
- similare0
- Comparator
- sodium nitratee0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
seabird guano had similar yield response to sodium nitrate.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- seabird guanoe0
- Outcome
- yield responsee0
- Direction
- similare0
- Comparator
- sodium nitratee0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
soy protein had higher yield response to feather meal.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- soy proteine0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- feather meale0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
soy protein had higher yield response to composted layer manure.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- soy proteine0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- composted layer manuree0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
seabird guano had higher yield response to feather meal.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- seabird guanoe0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- feather meale0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
seabird guano had higher yield response to composted layer manure.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- seabird guanoe0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- composted layer manuree0
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, soy protein and seabird guano were often similar to sodium nitrate in yield response and resulted in higher yields when compared with other sources of organic N, such as feather meal and composted layer manure.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
Feather meal reduced yield by 10%.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- feather meale0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- 10e0
- Comparator
- sodium nitratee2
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While feather meal and composted layer manure resulted in a 10 and 11% reduction in yield, respectively, there was no significant difference in tobacco value among treatments.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
e2“Sodium nitrate resulted in higher foliar nitrate‐N concentration than composted layer manure at layby and higher cured leaf yield compared with feather meal and composted layer manure.”
Claim · model-written summary
Composted layer manure reduced yield by 11%.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- composted layer manuree0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- 11%e0
- Comparator
- sodium nitratee2
- Setting
- North Carolinae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While feather meal and composted layer manure resulted in a 10 and 11% reduction in yield, respectively, there was no significant difference in tobacco value among treatments.”
e1“North Carolina”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
e2“Sodium nitrate resulted in higher foliar nitrate‐N concentration than composted layer manure at layby and higher cured leaf yield compared with feather meal and composted layer manure.”
Claim · model-written summary
Tobacco value did not differ significantly among fertilizer treatments.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- treatmentse0
- Outcome
- tobacco valuee0
- Direction
- no significant differencee0
- Comparator
- treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While feather meal and composted layer manure resulted in a 10 and 11% reduction in yield, respectively, there was no significant difference in tobacco value among treatments.”
t0“Organic nitrogen fertilizer sources for field production of flue‐cured tobacco (Nicotiana tabacum L.)”
Claim · model-written summary
The authors suggest organic tobacco farmers can choose N sources beyond feather meal.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- other options for N selection beyond the current feather meal standarde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results suggest that organic tobacco farmers have other options for N selection beyond the current feather meal standard.”
The same questions in other papers
fertilization · yield · Nicotiana tabacum (tobacco)Positive and negative results
26 papers in the same direction as this paper · 187 in the opposite direction
- positive
- positive
- positive
210 papers more in this group
See all 214 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.