Abstract
Sulfur recommendations are based on avoiding deficiency. Since S may have additional effects, the objective was to determine whether S fertilizers increase yield and reduce tuber defects. Potato ( Solanum tuberosum L.) cultivar Atlantic was treated with wettable sulfur (WS), ammonium sulfate (AS), and ammonium thiosulfate (TS) at 0, 28, 56, 84, and 112 kg S ha −1 applied at planting [in‐furrow (IF)], 11 d later [pre‐emergence (PE)], 11 d after emergence [postemergence (PT)], and at tuber initiation (TI). Separate trials were conducted for each fertilizer and application. Ammonium nitrate and urea were added to AS and TS to equalize N. Yield of U.S. “A” potato was increased 11 to 34% by fertilizers at S rates greater than 56 kg ha −1 at IF, PT, and by AS and WS at TI. These fertilizers applied IF and at TI reduced the incidence of common scab ( Streptomyces scabies ) on tubers. When applied PT, AS and TS reduced common scab; WS did not. The incidence of black scurf ( Rhizoctonia solani ) on tubers was reduced when AS and TS were applied PT but not when applied IF and at TI. Pre‐emergence application had no effect. Other tuber characteristics, e.g., specific gravity and vascular discoloration, were unaffected. Plant growth was inhibited by TS applied after emergence but recovered. Yield was increased by S at 56 kg ha −1 applied IF, PT, and at TI except for TS applied at TI. Common scab and black scurf were reduced depending on application timing and fertilizer.
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Claims 9
Claim · model-written summary
Sulfur fertilizers above 56 kg ha−1 increased U.S. A potato yield by 11 to 34% at in-furrow and postemergence timings, and AS and WS at tuber initiation.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- fertilizers at S rates greater than 56 kg ha −1e0
- Outcome
- Yield of U.S. “A” potatoe0
- Direction
- increasede0
- Value
- 11 to 34%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of U.S. “A” potato was increased 11 to 34% by fertilizers at S rates greater than 56 kg ha −1 at IF, PT, and by AS and WS at TI.”
Claim · model-written summary
Sulfur fertilizers applied in-furrow and at tuber initiation reduced common scab on tubers.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- fertilizers applied IF and at TIe0
- Interactor
- Streptomyces scabiesStreptomyces scabieie0pathogen
- Outcome
- incidence of common scabe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These fertilizers applied IF and at TI reduced the incidence of common scab ( Streptomyces scabies ) on tubers.”
t0“Potato”
Claim · model-written summary
Postemergence AS and TS reduced common scab.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- AS and TSe0
- Outcome
- common scabe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When applied PT, AS and TS reduced common scab; WS did not.”
t0“Potato”
Claim · model-written summary
Postemergence WS did not reduce common scab.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- WSe0
- Outcome
- common scabe0
- Direction
- did note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When applied PT, AS and TS reduced common scab; WS did not.”
t0“Potato”
Claim · model-written summary
Postemergence AS and TS reduced black scurf, unlike in-furrow and tuber-initiation application.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- AS and TS were applied PTe0
- Interactor
- Rhizoctonia solani
Rhizoctonia solanie0pathogen - Outcome
- incidence of black scurfe0
- Direction
- reducede0
- Comparator
- applied IF and at TIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The incidence of black scurf ( Rhizoctonia solani ) on tubers was reduced when AS and TS were applied PT but not when applied IF and at TI.”
t0“Potato”
Claim · model-written summary
Pre-emergence application had no effect.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Pre‐emergence applicatione0
- Outcome
- effecte0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre‐emergence application had no effect.”
t0“Potato”
Claim · model-written summary
Specific gravity and vascular discoloration were unaffected.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- Sulfur Fertilizerst1
- Outcome
- specific gravity and vascular discoloratione0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Other tuber characteristics, e.g., specific gravity and vascular discoloration, were unaffected.”
t0“Potato”
t1“Sulfur Fertilizers”
Claim · model-written summary
TS applied after emergence temporarily inhibited plant growth.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- TS applied after emergencee0
- Outcome
- Plant growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant growth was inhibited by TS applied after emergence but recovered.”
t0“Potato”
Claim · model-written summary
Sulfur at 56 kg ha−1 increased yield when applied in-furrow, postemergence, or at tuber initiation, except TS at tuber initiation.
- Taxon
- PotatoSolanum tuberosumt0
- Treatment
- S at 56 kg ha −1 applied IF, PT, and at TIe0
- Outcome
- Yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was increased by S at 56 kg ha −1 applied IF, PT, and at TI except for TS applied at TI.”
t0“Potato”
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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.