Manure Spreader
Manure is an organic matter (from animal feces) used to fertilize (making soil more productive and rich in nutrients) agricultural land. Fertilizers such as manure help the soil to retain water, and make crops grow stronger and larger.
The manure spreader is hitched onto the back of the tractor to spread manure over the fields.
Video of Manure Spreader in Action:
[https://archive.org/details/0914_Soybeans_for_Farm_and_Industry_00_21_44_29