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De Souza, A., GarcĂ­a, D., Sueiro, L., Licea, L. and Porras, E. 2005. Pre-sowing magnetic treatment of tomato seeds: effects on the growth and yield of plants cultivated late in the season. Spanish Journal of Agricultural Research. 3, 1 (Mar. 2005), 113-122. DOI:https://doi.org/10.5424/sjar/2005031-131.