This paper aims to discover a proper categorical framework for understanding the branch of seventeenth-century poetry that portrays nature, which appeared following "Kangho" Sijo of the sixteenth century. Is it to be approached under the rubric of "Jeonga Sijo" (pastoral lyrics) or included in "Jayongnong Siga" (independent farmers songs)? If neither is a valid category, is there any alternative? This is the starting point of the problematics that this essay develops. To reach a solution, this essay focuses on the following two aspects: first, whether to consider the historical character of the ``Jaeji Sajok" (local gentry), who were the main producers of the seventeenth-century poetry on nature, in terms of differentiation or of continuous development secondly, whether the aspects of nature described in this seventeenth-century poetry on nature retain the characteristics of Jeonga or those of Jayongnong. In pursuing these questions, a tentative conclusion is reached: the seventeenth-century poetry on nature includes a type of works that should be categorized into Jeonga Sijo as well as another type that should be classed into Jayongnong Siga. Finally, the necessity to make solid this tentative conclusion calls for a more detailed and rigorous study of the historical characteristics of the seventeenth-century Jaeji Sajok.