tillage · Yield · Vigna unguiculata (cowpea)
65 claims from these papers; 4 citations between them.
Papers whose results differ, checked claim by claim 2
2 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.
- Effect of tillage and mulch on soil and the growth and yield of cowpea grown in the arid tropics (1987)
increaseTillage increased cowpea grain yield from 8.2 to 12.3 q ha−1 (mean of 1983 and 1984).
A comparison of conventional tillage and no-tillage for cowpea (Vigna unguiculata (L.) Walp.) production (1985)no changeCowpea growth and yield on Anira peat were not significantly affected by tillage.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Effect of tillage and mulch on soil and the growth and yield of cowpea grown in the arid tropics (1987)
increaseTillage increased cowpea grain yield from 8.2 to 12.3 q ha−1 (mean of 1983 and 1984).
TILLAGE, SEED BED CONFIGURATION AND MULCHING: EFFECTS ON SOIL PHYSICAL PROPERTIES, AND RESPONSES OF CASSAVA, COWPEA AND MAIZE (1979)no changeTillage had no significant effect on cowpea yield.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
How these papers cite each other
4 citations between these papers: 3 on the same side, 1 across the two sides.
- 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 27
Effects of No-tillage and Ploughing on Efficiency of Water Use in Maize and Cowpea · 1978
- positive
Effect of tillage and mulch on soil and the growth and yield of cowpea grown in the arid tropics · 1987
- positive
- positive
Agronomic Sustainability of Different Farming Systems on Alfisols in Southwestern Nigeria · 1994
- positive
- positive
- positive
- no effect
- positive
- positive
- negative
- positive
Effect of Irrigation Amount and Tillage System on Yield and Water Use Efficiency of Cowpea · 2006
- positive
- positive
Effect of Four Different Tillage Practices on Cowpea Performance · 2010
- positive
- negative
- positive
GREEN POD PRODUCTION IN COWPEA AND SUPPORT SYSTEMS IN WARM CLIMATE · 2013
- positive
- positive
Sistemas de manejo e efeito residual do potássio na produtividade e nutrição do feijão-caupi · 2014
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- no effect
- positive
- positive
Effect of Rhizobium Inoculation and Tillage Practices on Fodder Cowpea (Vigna unguiculata) · 2020
- positive
- positive
- positive
- positive
Weed control and cowpea yield under different tillage systems · 2022
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
- positive
Papers reporting a negative result or no effect 8
- no effect
- no effect
- no effect
- negative
- negative
Effect of continued cropping on a heavy clay soil on the coast of Guyana with and without tillage. · 1992
- no effect
- negative
Conservation tillage for organic agriculture: Evolution toward hybrid systems in the western USA · 2012
- negative
Cowpea response to compaction and mulching on a sloping loamy sand soil in Southern Nigeria · 2017
- negative
- no effect
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.