Which factor can exacerbate hard ground conditions while digging?

Using a large bucket can indeed exacerbate hard ground conditions while digging. When a large bucket is employed, it exerts more surface area contact with the ground, which increases resistance and can make the digging process more difficult, especially in hard or compacted materials. The force required to penetrate the hard surface is greater, and this can lead to excessive strain on the equipment, inefficient digging, and potentially damaging the machinery.

In contrast, the other factors listed could have varying effects. A skilled operator might be able to manage the challenges associated with hard ground by utilizing techniques and strategies to increase efficiency and reduce strain. Operating on a slope doesn't necessarily worsen hard ground conditions; it may even allow for better drainage and ease the digging process in some situations. Wet ground conditions can sometimes soften the soil, making it easier to dig; however, overly saturated ground can lead to different complications such as increased stickiness and potential for equipment to sink or get bogged down.