No CrossRef data available.
Article contents
The effect of time of planting on four bean (Phaseolus vulgaris) genotypes in Kenya
Published online by Cambridge University Press: 27 March 2009
Summary
Four genotypes of dry beans were compared at three planting dates during one season (April to June, 1976) and four planting dates during a second season (November 1976 to January 1977). Yield declined with delay in planting in both seasons but in the second season yields were lower at the first planting and declined less rapidly. Canadian Wonder was the most stable-yielding genotype and had highest mean yield though it may have been inferior to other genotypes at the two most favourable plantings. Its stability was attributed to drought escape and good field resistance to drought and disease. Mexican 142 was the least stable genotype. A black-seeded landrace yielded well in dry conditions in spite of its long duration.
The most important components determining planting date effects on yield were numbers of pods per plant and seeds per pod. Canadian Wonder had markedly more stable numbers of pods than any other genotype.
Cooler temperatures in July and August retarded crop development in the first season. For one planting of the second season, flowering was retarded by 7–10 days in all genotypes and this was apparently an effect of water shortage. No effect of water was apparent on the time taken from flowering to maturity.
- Type
- Research Article
- Information
- Copyright
- Copyright © Cambridge University Press 1980