旋耕机与旋耕刀.ppt

Rotary TillersAnd Rotary Blades
旋耕机与旋耕刀
Background
Rotary tiller (rotary hoe) is widely used for soil cultivation
In south of China, more than 80% soil tillage work is finished by rotary tillers
Rotary tiller used in dry lands
L-shaped rotary blades with straight-line edges
Rotary tiller used in China
Rotary blades with curved edges, used in paddy fields
Howard rotavator
An Innovation in Australia
A long row to hoe
The Howard Rotavator
 
In 1912, 16-year-old Cliff Howard had an idea that would change the way small farms were cultivated. To make hoeing more efficient, Howard introduced power to the hoe’s blades, so that they would dig the earth and help push the hoe forward at the same time. All the farmer had to do was steer.