Abstract
Abstract Flue‐cured tobacco was grown for two years in a Pugwash sandy loam near Truro, Nova Scotia. Two different rates of P, Mg and Zn fertilizers, and combinations thereof, were applied to the soil to determine the response in tobacco growth, leaf nutrient content, and soil fertility. Fertilizer treatments used were 87 and 174 kg P2O5/ha, 35 and 70 kg Mg/ha, and 5 and 10 kg Zn/ha. All fertilizer treatment combinations increased yield compared with a control; however, of all the combinations, only the 10 kg Zn treatment in 1983 increased tobacco tissue concentration. After two years, only soil NH4OAC‐extractable K2O and EDTA‐extractable Zn were affected by any of the treatments. Of six extractants evaluated for their ability to relate extractable soil Zn with tissue Zn, EDTA, DTPA‐TEA, Mehlich I, and 0.1 M HCl produced similar significant correlation coefficients; NH4OAC (pH 4.8 and pH7)‐extractable Zn did not correlate well with tissue Zn.
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Claims 6
Claim · model-written summary
All fertilizer treatment combinations increased tobacco yield compared with a control.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- fertilizer treatment combinationse2
- Outcome
- yielde2
- Direction
- increasede2
- Comparator
- a controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco and fertility status”
e2“All fertilizer treatment combinations increased yield compared with a control”
Claim · model-written summary
Only the 10 kg Zn treatment in 1983 increased tobacco tissue concentration.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- 10 kg Zn treatmente3
- Outcome
- tobacco tissue concentratione3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco and fertility status”
e3“only the 10 kg Zn treatment in 1983 increased tobacco tissue concentration”
Claim · model-written summary
After two years, only soil extractable K2O was affected by the treatments.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- extractable K2Oe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco and fertility status”
e4“After two years, only soil NH4OAC‐extractable K2O and EDTA‐extractable Zn were affected by any of the treatments”
Claim · model-written summary
After two years, only soil extractable Zn was affected by the treatments.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- extractable Zne4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco and fertility status”
e4“After two years, only soil NH4OAC‐extractable K2O and EDTA‐extractable Zn were affected by any of the treatments”
Claim · model-written summary
Mehlich I, 0.1 M HCl and the other listed extractants gave similar significant correlation coefficients between extractable soil Zn and tissue Zn.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- correlation coefficientse5
- Value
- similare5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco and fertility status”
e5“Mehlich I, and 0.1 M HCl produced similar significant correlation coefficients”
Claim · model-written summary
NH4OAC (pH 4.8 and pH7)-extractable Zn did not correlate well with tissue Zn.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- correlate well with tissue Zne6
- Comparator
- NH4OAC (pH 4.8 and pH7)e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tobacco and fertility status”
e6“NH4OAC (pH 4.8 and pH7)‐extractable Zn did not correlate well with tissue Zn”
The same questions in other papers
zinc atom · molecular: metabolites · Nicotiana tabacum (tobacco)Positive and negative results
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- no effect
- positive
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See all 5 papers →fertilization · yield · Nicotiana tabacum (tobacco)Positive and negative results
186 papers in the same direction as this paper · 24 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- no effect
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.