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The appropriate planting time for the profitable production of the quality seed of kenaf (Hibiscus canabinus L.) in southwestern Nigeria

The low seed yield of kenaf in different agro-ecologies in southwestern
 Nigeria has been partly attributed to the effect of climate change. An
 experiment was, therefore, conducted to determine the response of kenaf to
 prevailing weather conditions and the most appropriate planting time to
 produce optimum seed yield of acceptable quality that will be profitable in
 humid agro-ecologies of Nigeria. The study was conducted at five research
 stations (Ibadan, Ilora, Ikenne, Orin Ekiti and Kishi) of the Institute of
 Agricultural Research and Training (I.A.R.&T) in Ibadan, Nigeria, in the
 2018 and 2019 planting seasons (June to August). Seeds of five varieties of
 kenaf (Cuba108, Ifeken DI 400, Ifeken100, Ifeken 400 and Tianung-2) were
 planted at monthly interval between June and August of each year in a
 randomised complete block design (RCBD) with three replicates. Harvesting,
 threshing and cleaning were manually done, and samples of clean seeds were
 analysed for seed quality. Data were obtained on plant height at harvest,
 seed yield-related traits and seed quality parameters. Profitability
 analysis was also conducted to estimate the cost and returns to production
 in the different locations. Kenaf seed yield and quality were highly
 influenced by the production environment. It is concluded that planting of
 kenaf in mid-June in southwestern Nigeria will give optimum seed yield of
 high quality with profitable gross return on investment.