The county can be dug into the soil to a depth of 10-15 cm over where to loosen the steel plough and because the vibration from the running of the spring soil improved self-esteem and break a little better.
Plows can be dug into the soil to 10-15 cm deep plowing spike. Because of the vibration from the work of the spring the soil is broken into small lumps and bumps better.
The plow that can pick into the soil to 10-15 cm. Which is deeper than the plow steel spikes. And because of vibration from the work of the spring makes the earth was struck and broken a little better.