Jethro Tull (agriculturist) the seed so that it could grow. Before the introduction of the seed drill, the common practice was to plant seeds by broadcasting (evenly throwing) them across the ground by hand on the prepared soil and then lightly harrowing the soil to bury the seeds to the correct depth. In his 1731 publication Tull described how the motivation for developing the seed-drill arose from conflict with his servants. He had struggled to enforce his new methods upon them, in part because they resisted the threat to their position as labourers and their skill with the plough. Jethro Tull invented some
Drill instructor Drill Instructor is evaluated as well. These new drill instructors bear the burden of responsibility for breaking down a recruit's sense of self and selfishness, so that the more experienced drill instructors can focus the recruits on selflessness, obedience, and fraternity. After completing a few 13-week cycles, the drill instructor is moved up to the position of "Experienced Drill Instructor" (EDI), also called the "heavy", "drill hat" or "J Hat". The next step in a drill instructor career is becoming a "Senior Drill Instructor". Senior Drill Instructors hold a respected position which is distinguished by the wearing of a black