International Journal of Research and Review Vol.7; Issue: 8; August 2020 Website: www.ijrrjournal.com Research Paper E-ISSN: 2349-9788; P-ISSN: 2454-2237 International Journal of Research and Review (ijrrjournal.com) 434 Vol.7; Issue: 8; August 2020 Impact of Use of Certified Seeds on Rice Paddy Farming; Case Study: Kolam Village, Percut Sei Tuan District, Deli Serdang Regency Shinta Dewi Sitorus 1 , Diana Chalil 2 , Rulianda Purnomo Wibowo 2 1 Postgraduate Students Department of Agribusiness, Faculty of Agriculture at Universitas Sumatera Utara, Indonesia 2 Postgraduate Lecturer Department of Agribusiness, Faculty of Agriculture at Universitas Sumatera Utara, Indonesia Corresponding Author: Shinta Dewi Sitorus ABSTRACT This study aims to determine the impact of using certified seeds on rice paddy farming (case study: Kolam Village, Percut Sei Tuan District, Deli Serdang Regency). This research was conducted in the Kolam Village, Percut Sei Tuan District, Deli Serdang Regency. The sample technique used in this study was purposive sampling. The population in this study were 1,238 farmers. With the slovin formula, and the error tolerance limit of 10%, the sample size for Kolam Village is 93 farmers. To determine the impact of using certified seeds, a difference test between two different populations was carried out using an independent sample t test. The results showed that there were significant differences in productivity, revenue, and income between lowland rice farming using jabal seeds and those using certificate seeds. As for the total cost, there is no significant difference between lowland rice farming using jabal seeds and those using certified seeds. Keywords: Certified Seeds, Jabal Seeds, Productivity, Revenue, Total Cost, Income. INTRODUCTION Deli Serdang Regency as one of the central rice production districts in North Sumatra consists of several sub-districts which also have quite large rice fields. The pre-survey was conducted in several villages in Deli Serdang Regency. Information was obtained from several farmers in the village that many farmers were reluctant to use certified superior seeds. From the pre-survey results, information was obtained from local extension officers that the superior seeds that were given to farmers were certified superior seeds. Generally, certified superior seeds socialized and marketed in the Deli Serdang district are of the inpari type. This means that farmers who receive seed assistance use certified superior seeds for their lowland rice farming. Meanwhile, farmers who did not receive superior seed assistance, based on the results of interviews during the pre-survey, these farmers generally used jabal seeds (seed networks between fields) which were of course non- certified for their paddy fields. Impact according to Soemarwoto (1998) is an act that occurs as a result of an activity. In general, impact is anything that results from 'something'. The impact itself can also mean, the consequences before and after 'something'. In this research, we will analyze the state of lowland rice farming in terms of productivity, total revenue, total cost and income before using certified seeds and also after using certified seeds. However, farmers generally do not have records of their farming in the prior period. So the authors accept the category of farmers using jabal seeds or non-certified seeds as a reflection of “before” conditions and the category of farmers using certified seeds as a reflection of “after” conditions. Nurnayetti and Atman (2013) stated that most farmers stated that planting superior varieties of rice only if there was