Claim · model-written summary
Poor weed control was proposed as the principal reason for lower average yields without tillage on Anira peat.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- no-tilled plotse0
- Interactor
- weede0weed
- Outcome
- lower average yieldse0
- Qualifier
- poor weed controle0
- Setting
- Anira peate1
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleComparatorDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“lower average yields on no-tilled plots were thought to be caused largely by poor weed control”
e1“Anira peat and Onverwagt clay”
t0“cowpea (Vigna unguiculata (L.) Walp.)”
Title
L. A. Simpson; F. A. Gumbs Tropical Agriculture 1985
Other claims from this paper (7)
- Observation Conventional tillage did not improve physical characteristics of Anira peat.
- Intervention effect Cowpea growth and yield on Anira peat were not significantly affected by tillage.
- Observation Tillage significantly improved physical properties of clay soil.
- Intervention effect Cowpea yield did not differ significantly between tilled and untilled clay plots.
- Mechanism Poorer soil physical conditions appeared to explain the lower mean yield on untilled clay plots.
- Recommendation No-tillage on Anira peat with adequate weed control is preferred for cowpea production on the Guyana coast.
- Recommendation Further management research was recommended for clay soils.