What is the tool used for sowing seeds by a tractor called? 

A seed drill is a farm tool used to precisely and uniformly plant seeds into the ground. The drill ensures that seeds are sown at equal spacing and depth, which can improve germination rates and promote healthy plant growth.

The seed drill ensures that each seedling has enough space to grow and access the resources it requires, such as sunlight, water, and nutrients, by sowing seeds at equal distances and at a consistent depth. This can result in a more even plant stand, which can help to maximize yields and reduce crop losses caused by overcrowding or disease.