I am using QGIS version 3.10. I have a farm boundaries layer (https://drive.google.com/drive/folders/1xYZmSboM75GACCWQyx-06wZ3EdHBcMrM?usp=sharing), and want to merge certain adjacent polygons into one fenceless area (the resultant merged area will be a nature reserve in which the fences between farms have been removed).
I tried to use the following method to achieve this: toggle editing -> clicked on polygons I want to merge -> merge selected features. A table "Merge Feature Attributes" pops up and from here I am not sure what to do, because, whichever option in the merge features table I select, the result is not what I want. For example, if I say skip all fields the result is that only some line segments have been removed:
The ultimate aim is to have the farm boundaries layer with the line segments between the selected polygons removed. I am analysing the movement of wildlife (which in the nature reserve is unobstructed by fences).
Additionally, as a second question, I would like to find out how to use a different method to achieve the same goal: I have the same farm boundaries layer (green) and a national park layer (pink). I deleted the farms that belong to the nature reserve (white area):
Is it possible to save out the white area as a new polygon (without having to use digitising tools) and then merge it with the farm boundaries layer?