Rotary Tiller and Tine Extensions.
Cuts through sod or previously worked soil to prepare ideal seed bed without destroying humus. Tilling action is determined by ground speed and engine speed ... depth is controlled by depth limit chain (10 and 16 hp.) ... and by manual lift on 8 hp. models... with optional electric lift on 10 hp. and 16 hp. models. Removable tines can be spaced to suit plant rows. Rear lift kit required on 10 hp. and 16 hp. models Two front wheel weights and four rear wheel weights are recommended.
Simplicity works for you all year 'round.
[Source: Simplicity Lawn Tractors catalog, Form No. 21-005, hand-dated 10/12/72, courtesy of Chris Geise]