Khác biệt giữa bản sửa đổi của “Máy gieo hạt”

 

'''Máy gieo hạt''' là thiết bị dùng để gieo hạt chính xác. Trước khi máy gieo hạt xuất hiện, phương pháp gieo hạt được thực hiện bằng tay. Phương pháp này vừa lãng phí, vừa thiếu chính xác, dẫn đến việc phân bố hạt giống không đều và làm giảm hiệu suất. Việc sử dụng máy gieo hạt có thể tăng hiệu suất lên tới 8 lần.

A further important consideration was weed control. Broadcast seeding results in a random array of growing crops, making it difficult to control [[weed]]s using any method other than hand weeding. A field planted using a seed drill is much more uniform, typically in rows, allowing weeding with the [[Hoe (tool)|hoe]] during the course of the growing season. Weeding by hand is laborious and poor weeding limits yield.

 

 

While the [[Sumerians]] used primitive single-tube seed drills around 1500 BC, the invention never reached Europe. Multi-tube iron seed drills were invented by the Chinese in the 2nd century BC.<ref name="temple">Temple, p.25</ref> This multi-tube seed drill has been credited with giving China an efficient food production system that allowed it to support its large population for millennia.<ref name=temple /> It has been conjectured that the seed drill was introduced in Europe following contacts with China.<ref name="temple" />