Studies on Deeper Rotary Tillage (IV)

Design of Scoop Surface of Rotary Blade for Throwing of Tilled Soil Clods backward

Abstract

This paper describes the design method of scoop surface of rotary tiller blades and model tests with designed blades and commonly used Japanese blades in order to improve backward throwing of soil clods on deep rotary tillage.
1) Up cutrotary tilling was superior for backward throwing of tilled soil clods.
2) In the case of any tilling condition, the design method studied in this paper proposed appropriate scoop surface for throwing the soil backward when throwing direction and its distance were given.
3) The blade designed by this method was superior for throwing of the soil clods. And the locus of thrown soil clods was agreed with the simulation result which calculated with the throwing model.
4) Tillage with the designed blade might give less tilling energy caused by repeat cutting of tilled soil than with commonly used Japanese blade.