* Furrows: These are the lines or trenches made in the soil by a plow. They are used to plant seeds and help water drain.
* Rows: These are the lines of plants growing in a field, often following the furrows.
* Fence lines: These are the lines created by fences that mark boundaries between fields or properties.
* Contour lines: These are lines on a map that show the elevation of the land. They are important for farmers to understand how water flows and where to plant crops.
To give you a more specific answer, I need more context. Could you please tell me what kind of farm you are thinking about, or what you are seeing on the farm?