Isak Sellanraa is a fictional character from the novel "Growth of the Soil" by Knut Hamsun. He is a farmer living in rural Norway during the late 19th century, embodying the struggles and triumphs of rural life. Isak is depicted as hardworking and determined, dedicated to cultivating his land and building a life for himself and his family. Throughout the story, Isak's character represents themes of connection to nature, the importance of land, and the challenges faced by individuals in a changing society. His journey reflects the broader experiences of Norwegian farmers during this period, highlighting their resilience and adaptability.