Multilocational Testing and Farmer Participatory Evaluation of Sweet Potato Varieties in Southwest Kenya For Commercial and Domestic Use

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Date
2008
Authors
JOHNSON K K
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JOHNSON K K
Abstract
Sweetpotato [Ipomoea batatas (L.) Lam] is a drought tolerant and a food security crop. Western Kenya, accounts for over 60% of the total national production. Currently, average farmer root yields is 5 tons per ha compared with the potential of 50 tons per ha. However, intensive production has been constrained by lack of improved varieties, pests, diseases and scarcity of land, resulting in declining yields. The objective of this study was to evaluate with the farmers the new high yielding, nutritious, pests and disease tolerant sweetpotato varieties. Eleven improved sweetpotato varieties; Kemb 1 0, SPK004, Mugande, Namaswakhe, KII7, Polista, Bungoma, Odinga, 292-H-I2, Zapallo and Nyathi Odiewo (Improved), were tested against four popular farmer varieties; Nyathi Odiewo (local), Jayalo, Amina and Kuny kibuonjo. The experiment was laid out in a randomized complete block design (RCBD) with 12 treatments replicated four times per location in mother and baby trial with farmers' involvement. The study was conducted in farmers' field in four locations covering the major sweetpotato production agro-ecological zones (AEZs) of southwest Kenya namely; Kabondo (AEZ UM2), Ndhiwa (LM 2), Rangwe (LM]) and Kendu (LM3).
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