History of agriculture the New Leicester sheep. Machines were invented to improve the efficiency of various agricultural operation, such as Jethro Tull's seed drill of 1701 that mechanised seeding at the correct depth and spacing and Andrew Meikle's threshing machine of 1784. Ploughs were steadily improved, from Joseph Foljambe's Rotherham iron plough in 1730 to James Small's improved "Scots Plough" metal in 1763. In 1789 Ransomes, Sims & Jefferies was producing 86 plough models for different soils. Powered farm machinery began with Richard Trevithick's stationary steam engine, used to drive a threshing machine, in 1812. Mechanisation spread to other farm uses through the
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