Mechanization in 1801, displacing the centuries-old hand method of making individual sheets of paper. One of the first mechanical devices used in agriculture was the seed drill invented by Jethro Tull around 1700. The seed drill allowed more uniform spacing of seed and planting depth than hand methods, increasing yields and saving valuable seed. Mechanized agriculture greatly increased in the late eighteenth and early nineteenth centuries with horse drawn reapers and horse powered threshing machines. By the late nineteenth century steam power was applied to threshing and steam tractors appeared. Internal combustion began being used for tractors in the early twentieth
Drill instructor of which the most well known is Basic Training or boot camp. Their responsibilities include areas such as military discipline, physical fitness, and weapons training. The title of Drill Instructor is a billet independent of rank, to be held by Non-Commissioned Officers who successfully complete the intense training program to earn that title. The rank held by drill instructors varies by branch: The arduous nature of drill instructor duty means that such assignments are among the most prestigious carried out by enlisted personnel. Those who become drill instructors are eligible for a variety of military awards, such as the Marine