Effect of Yam tuber size weight on its yield in Western Oromia, Ethiopia
Keywords:
Yam tuber cutting, mini-settsAbstract
Yams (Dioscorea spp.) are an annual tuber and monocotyledonous crop. The plant Genus comprises of over 600 species with only 10 species producing edible tuber. A field experiment was conducted at Western Oromia to recommend appropriate tuber weight of yam cutting for the farming and its economic feasibility for communities in western Oromia for two consecutive years during the main cropping season of 2017 and 2018 at Bako Agricultural Research Center (BARC) on station and subsite of Gute. Yam variety Bulch, which is adapted to the agro-ecology of the area, was used for the study appropriate tuber weight of yam cutting. Planting was done on April and yam tuber cutting at different gram were planted at a spacing of 80 cm between rows and 30 cm between plants. After cutting up the tuber into mini-setts, takes ash and rub ash onto the freshly cut fresh that are exposed. Nitrogen fertilizer was used 100kg/ha in two splits and 100kg/ha NPS which were used.100kg/ha NPS and half Nitrogen fertilizer applied after emergence and the remaining half a month after first application along the rows of each plot to ensure that N is evenly distributed. The treatment consists of factorial combination of one variety (Bulch) with six treatment ((50-100g/ha), (101-150g/ha), (151-200g/ha), (201-250g/ha), (2501-300g/ha) and (whole size as control)) yam tuber cutting different weight size. The treatments were arranged in randomized complete block design (RCBD) with three replications. Each plot will be 4.8m long and 3m wide (6 rows). Finally, yam tuber plant in the central net plot area (9.6 m2) was harvested at normal physiological maturity.
Therefore, the result of the economic analysis (partial budget) show that best promising yam tuber cutting size weight 201-250g (78874.3 birr) followed by 151-200g (73096.3birr) and 251-300g (70936.3 birr) and tuber yield tone hectare (57.95 tone/ha, 56.42 tone/ha and 54.45 tone/ha respectively were recommended for farmer or end user in western Oromia of yam production area and similar agroecology.
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