Broadcast mechanical clock device editing

In order to ensure consistent line spacing, and should be installed on the seeder row marker. Some seeders also seeding monitoring device, and automatically monitor sowing process signals in case of failure, so that ruled out.

Earlier when a farmer sowing, from the head to the head of the field, walked to the ground and left pull handfuls of seeds. But this is called "spread" method is very unreliable. Some parts fall many seeds, seeds are rarely falls and other places.

Of course, the solution to this problem is to uniform rows of seed. But what about how to do this? the ancient Mesopotamians invented the first planter in about 3500 BC, or seed machine. It is a small box with a narrow tube, can follow the plow out of the straight flute removed seeds.