copper atom · Yield · Allium cepa (onion)
11 claims from these papers.
Papers whose results differ, checked claim by claim 4
4 pairs of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.
- THE RESPONSE OF CARROTS AND ONIONS TO MICRONUTRIENTS ON AN ORGANIC SOIL IN MANITOBA (1966)
increaseCopper addition increased onion yield by 6.2 tons per acre in 1963.
EFFECT OF APPLIED COPPER ON VEGETABLE CROPS GROWN IN PRINCE EDWARD ISLAND (1983)no changeCopper at 2 and 4 kg/ha did not increase onion yields.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Crop Responses to Some Micronutrients and Sodium on Sphagnum Peat Soil (1964)
increaseCopper increased final crop yield by 63%.
A STUDY OF ONIONS GROWN IN MICROPLOTS ON THREE ORGANIC SOILS EACH CONTAINING FOUR LEVELS OF COPPER (1983)no changeCopper treatment and total soil copper did not affect onion yields at sites B or C.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - THE RESPONSE OF CARROTS AND ONIONS TO MICRONUTRIENTS ON AN ORGANIC SOIL IN MANITOBA (1966)
increaseCopper addition increased onion yield by 6.2 tons per acre in 1963.
A STUDY OF ONIONS GROWN IN MICROPLOTS ON THREE ORGANIC SOILS EACH CONTAINING FOUR LEVELS OF COPPER (1983)no changeCopper treatment and total soil copper did not affect onion yields at sites B or C.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - EFFECT OF APPLIED COPPER ON VEGETABLE CROPS GROWN IN PRINCE EDWARD ISLAND (1983)
no changeCopper at 2 and 4 kg/ha did not increase onion yields.
Crop Responses to Some Micronutrients and Sodium on Sphagnum Peat Soil (1964)increaseCopper increased final crop yield by 63%.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
How these papers cite each other
None of these papers cites another one here.
- Positive result
- Negative result or no effect
- Citation, pointing to the cited paper
- Citation across the two sides
- Larger circle: more citations overall
Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.
Papers reporting a positive result 7
Crop Responses to Some Micronutrients and Sodium on Sphagnum Peat Soil · 1964
- positive
THE RESPONSE OF CARROTS AND ONIONS TO MICRONUTRIENTS ON AN ORGANIC SOIL IN MANITOBA · 1966
- positive
A STUDY OF ONIONS GROWN IN MICROPLOTS ON THREE ORGANIC SOILS EACH CONTAINING FOUR LEVELS OF COPPER · 1983
- positive
- no effect
- positive
- positive
- positive
Management of bulb rot of onion caused by Erwinia carotovora pv. carotovora · 2020
- positive
Papers reporting a negative result or no effect 3
A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.