Agricultural machines, also known as farm equipment or farm machinery, are mechanical devices designed to perform various tasks and operations related to farming and agriculture. These machines play a crucial role in modern agriculture, improving efficiency, productivity, and overall output. Here are some common types of agricultural machines:

1. **Tractors:** Tractors are versatile vehicles used for a wide range of tasks on the farm. They can pull implements, plow fields, plant crops, cultivate soil, and perform other tasks using their power take-off (PTO) systems.

2. **Plows:** Plows are used to break up and turn over soil for planting. They come in various types, including moldboard plows, chisel plows, and disc plows.

3. **Harvesters:** Harvesters are machines designed to efficiently gather mature crops. Examples include combine harvesters for cereal crops and cotton harvesters for cotton.

4. **Planters and Seeders:** Planters and seeders are used to precisely plant seeds in the soil at the desired spacing and depth. They ensure uniform plant growth and optimal use of seeds.

5. **Cultivators:** Cultivators are used to control weeds and loosen the soil around growing crops. They can be used to prepare seedbeds, control weed growth, and incorporate fertilizers.

6. **Sprayers:** Sprayers are used to apply pesticides, herbicides, and fertilizers to crops. They help protect crops from pests and diseases and improve crop yield.

7. **Fertilizer Spreaders:** These machines evenly distribute fertilizers onto fields to provide essential nutrients to crops.

8. **Hay and Forage Equipment:** This category includes machines like mowers, tedders, rakes, and balers used for cutting, drying, and baling hay and other forage crops.

9. **Irrigation Equipment:** Irrigation machines, such as drip irrigation systems, sprinklers, and center pivots, are used to deliver water to crops, ensuring proper hydration for optimal growth.

10. **Threshers:** Threshers separate grains from their stalks and husks. They are commonly used for crops like wheat, rice, and barley.

11. **Livestock Equipment:** This includes machines like feeders, waterers, milking machines, and animal housing systems used for raising and managing livestock.

12. **Trucks and Trailers:** Trucks and trailers are used for transporting agricultural products, machinery, and livestock.

13. **Tillage Equipment:** Tillage equipment includes tools like harrows, plows, and cultivators that prepare the soil for planting by breaking up clods and creating a suitable seedbed.

14. **Grain Dryers and Storage Equipment:** These machines are used to dry and store harvested grains, ensuring their quality and longevity.

15. **Greenhouse Equipment:** This category includes machines used in greenhouse farming, such as climate control systems, automated watering systems, and shading equipment.

16. **Haying Equipment:** Haying equipment, including balers and mowers, is used to manage and harvest grass and other plants for hay production.

17. **Tillage Equipment:** Tillage machines, like plows and disc harrows, are used to prepare the soil for planting by breaking up and turning over the soil.

18. **Weeders and Cultivators:** These machines are used to control weeds and manage soil around growing crops, reducing competition for resources.

These are just a few examples of the many types of agricultural machines used in modern farming practices. The specific machines needed vary depending on the type of crops, farming methods, and scale of operation. Advances in technology continue to lead to the development of more efficient and specialized agricultural machines to meet the evolving needs of the agriculture industry.