Ibrahim, A.J.K. and AL- Hamdani, S. abdulwhab 2018. Effect of spraying seaweed extract on the yield of different varieties of potatoes (Solanum tuberosum L.). Journal of agricultural, environmental and veterinary sciences. 2, 4 (Dec. 2018), 63–53. DOI:https://doi.org/10.26389/AJSRP.A230718.