Farm surveying is important because it determines the size and shape of farmland. This information is necessary for making decisions about how to use the land, such as how many crops to plant and how to lay out the fields. In addition, farm surveying can also help to identify potential problem areas, such as areas with poor drainage or erosion, which can affect soil fertility and crop yields. Overall, accurate and thorough farm surveying is essential for maximizing the productivity and profitability of a farm.