Seaweed extract effects on potato (Solanum Tuberosum 'BP1') and grape (Vitis Vinifera Var. Sultana) Production
October, John Reginald Vernon
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Field trials were conducted to determine the effects of a locally produced seaweed extract product (Afrikelp LG-1), on the growth parameters and yield of Solanum tuberosum 'BP1'potato crop and Vitis vinifera var. sultana grapes. The extrapolation of these results will assist local potato and grape farmers to produce quality crops with improved yields. Field experiments were conducted at the Agricultural Research Council (ARC) Nietvoorbij site in Stellenbosch, South Africa. The experimental layout consisted of four randomised blocks, and four replicates were used per treatment. Various concentrations of seaweed extracts (0, 2, 3, 4, 5, 6, and 7 l/ha) was applied as soil drench and foliar sprays over two cropping seasons, namely 2010 and 2011 (potato), and 2011 and 2012 (sultana grapes).