To ensure consistent line spacing, a track marker must be installed on the seed drill. Some planters are also equipped with seed monitoring devices that automatically monitor the seeding process and signal the failure to be eliminated in time.
When a farmer planted it in the early days, he walked from the head of the field to the other side, and while walking, he threw a handful of seeds on the ground. But this method called "sowing" is very unreliable. In some places, many seeds will fall, while others will have fewer seeds.
Of course, the solution to this problem is to evenly sow rows in rows. But how can this be done? The ancient Mesopotamians invented the first planter, or the seed machine, around 3500 BC. It is a small box with a narrow tube that can be used to remove the seed along the straight groove of the plow.
The first truly efficient planter was not built until 1701 by the British peasant inventor Jesslow Tours. Tours found that there were problems with the early planters, and they could not evenly sown seeds. Seeds should have been spread in a straight line, but there are often gaps in the seed sowing line. Therefore, Tours invented a spring mechanism that spreads the seeds evenly and continuously.