List four farm operation each required the use of solar water animal power electric power human power wind power machine and biogas

Here are four farm operations, each requiring the use of a different power source from your list:

1. Solar power: Drying crops like grains or fruits to preserve them.
2. Animal power: Plowing fields using oxen or horses to prepare the soil for planting.
3. Electric power: Operating irrigation pumps to supply water to crops.
4. Human power: Hand weeding to remove unwanted plants from crop fields.