Abstract
A pot experiment was conducted to evaluate tuber depth and weight of tiger nut produced in loamy fine sand and sandy clay soil using 0, 200, 300 or 400 g per pot of poultry or pig manure in a 2 × 2 × 4 factorial experiment arranged in completely randomized design and replicated three times. Total tuber weight and weight of tubers at 10 cm were significantly increased by application of manure compared with the control. Significant interaction of soil texture X manure types X manure rates was recorded on weight of tubers at 20 cm. Percentage of tubers at 0-10 cm was 90.6-92.1% (91.5-93.6% tuber weight); while 6.68-8.96% of the tubers (5.49-8.47% tuber weight) were harvested between 10-20 cm soil depth; only 0-0.94% of the tuber weight was harvested beyond 20 cm depth. Pig manure had positive effect on tiger nut productivity on loamy fine sand and sandy clay soil, while with poultry manure tiger nut productivity was enhanced on sandy clay soil; 300 g of pig or poultry manure produced similar weight of tiger nut tubers and is considered optimum for tiger nut productivity. Sandy clay and loamy fine sand had similar effect on depth and yield of tiger nut. More than 99% of the tubers were confined to 0-20 cm soil depth. Information on how deep the tubers of tiger nut can grow in soil of different texture and fertility status will enhance precise harvesting.
Highlights
Tiger nut (Cyperus esculentus) is a tuber crop belonging to the family cyperaceae
Tiger nut can be used to produce milk which is a good substitute for cow milk (Gambo and Da’u, 2014) and according to Sanful (2009), the result of sensory evaluation revealed that yoghurt from pure cow milk and the composite were similar in almost all quality attributes
Air dried poultry manure and pig manure were obtained from the university farm while the tigernut tubers were purchased from the local market
Summary
Tiger nut (Cyperus esculentus) is a tuber crop belonging to the family cyperaceae. The tuber is rich in dietary fiber, carbohydrate (Adejuyitan, 2011) and protein (Oladele and Aina, 2007; Belewu and Abodunrin, 2008). It is a rich source of oil, iron and calcium (Oladele and Aina, 2007). In Spain it is a cherished crop and is used in producing tiger nut milk called horchata de chufa. Tiger nut status as a crop is gradually increasing. Research and scientific efforts directed at its production is, very limited
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