Abstract
In researcher-designed, farmer-managed experiments with cabbage and hot pepper, ground seashells (GSS) were compared with low-grade phosphate lime (LGP) at rates of 0, 2.5, 5, 7.5 or 10 t ha −1 . A randomized complete block design, with replicates spread over different farms, was used. Liming with GSS or LGP at 10 t ha −1 increased cabbage yield from 0.5 t ha −1 without liming to 15.0 and 5.3 t ha −1 respectively. Hot pepper yield was increased from 2.1 t ha −1 without liming to 3.2 t ha −1 at the three highest rates of GSS and LGP. Application of GSS increased the pH, reduced exchangeable acidity and increased the extractable Ca content of the soil. Partial budget analyses revealed that cabbage and pepper growers obtained highest returns with GSS at 10 and 5 t ha −1 respectively.
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Claims 9
Claim · model-written summary
GSS at 10 t ha −1 increased cabbage yield to 15.0 t ha −1 from 0.5 t ha −1 without liming.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- GSS or LGP at 10 t ha −1e0
- Outcome
- cabbage yielde0
- Direction
- increasede0
- Value
- 15.0e0
- Comparator
- without liminge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming with GSS or LGP at 10 t ha −1 increased cabbage yield from 0.5 t ha −1 without liming to 15.0 and 5.3 t ha −1 respectively.”
Claim · model-written summary
LGP at 10 t ha −1 increased cabbage yield to 5.3 t ha −1 from 0.5 t ha −1 without liming.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- LGP at 10 t ha −1e0
- Outcome
- cabbage yielde0
- Direction
- increasede0
- Value
- 5.3 t ha −1e0
- Comparator
- without liminge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming with GSS or LGP at 10 t ha −1 increased cabbage yield from 0.5 t ha −1 without liming to 15.0 and 5.3 t ha −1 respectively.”
Claim · model-written summary
GSS at the three highest rates increased hot pepper yield from 2.1 to 3.2 t ha −1.
- Taxon
- Hot pepper
Capsicum frutescense0 - Treatment
- GSSe0
- Outcome
- Hot pepper yielde0
- Direction
- increasede0
- Value
- 3.2 t ha −1e0
- Comparator
- without liminge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hot pepper yield was increased from 2.1 t ha −1 without liming to 3.2 t ha −1 at the three highest rates of GSS and LGP.”
Claim · model-written summary
LGP at the three highest rates increased hot pepper yield from 2.1 to 3.2 t ha −1.
- Taxon
- Hot pepperCapsicum frutescense0
- Treatment
- LGPe0
- Outcome
- Hot pepper yielde0
- Direction
- increasede0
- Value
- 3.2 t ha −1e0
- Comparator
- without liminge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hot pepper yield was increased from 2.1 t ha −1 without liming to 3.2 t ha −1 at the three highest rates of GSS and LGP.”
Claim · model-written summary
GSS increased soil pH.
- Taxon
- CABBAGEBrassica oleracea var. capitatat0
- Treatment
- GSSe0
- Outcome
- pHe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of GSS increased the pH, reduced exchangeable acidity and increased the extractable Ca content of the soil.”
t0“CABBAGE AND HOT PEPPER”
Claim · model-written summary
GSS reduced soil exchangeable acidity.
- Taxon
- CABBAGEBrassica oleracea var. capitatat0
- Treatment
- GSSe0
- Outcome
- exchangeable aciditye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of GSS increased the pH, reduced exchangeable acidity and increased the extractable Ca content of the soil.”
t0“CABBAGE AND HOT PEPPER”
Claim · model-written summary
GSS increased extractable soil calcium content.
- Taxon
- CABBAGEBrassica oleracea var. capitatat0
- Treatment
- GSSe0
- Outcome
- extractable Ca content of the soile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of GSS increased the pH, reduced exchangeable acidity and increased the extractable Ca content of the soil.”
t0“CABBAGE AND HOT PEPPER”
Claim · model-written summary
Cabbage growers had highest returns with GSS at 10 t ha −1.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- GSS at 10 and 5 t ha −1e0
- Outcome
- highest returnse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cabbage and pepper growers obtained highest returns with GSS at 10 and 5 t ha −1 respectively”
Claim · model-written summary
Pepper growers had highest returns with GSS at 5 t ha −1.
Verbatim
e0“cabbage and pepper growers obtained highest returns with GSS at 10 and 5 t ha −1 respectively”
The same questions in other papers
phosphorus · yield · Capsicum frutescens (hot pepper)Positive and negative results
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- negative
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See all 7 papers →lime · yield · Brassica oleracea (wild cabbage)Positive and negative results
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- no effect
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See all 21 papers →phosphorus · yield · Brassica oleracea (wild cabbage)Positive and negative results
53 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
52 papers more in this group
See all 56 papers →lime · yield · Capsicum frutescens (hot pepper)Results agree
1 paper in the same direction as this paper
- positive
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.