1985 Volume 47 Issue 2 Pages 159-167
This paper describes the effect of the trial blades whose circular scoop surface are designed with the method described in previous paper on the improvement of backward throwing of soil clods and the reduction of tilling power in deep tillage compared to conventional Japanese curved blades. The experimental results were as follows:
(1) The trial blades in up cut rotary tilling threw much more soil clods backward at any tilling depth and then achieved remarkable reduction of the clods re-tilled in the rotating zone of the blades.
(2) The trial blades in up cut rotary tilling reduced tillage power requirement by 40% to 60% in deep tillage compared to Japanese curved blades in both up cut rotary tilling and down cut rotary tilling.
(3) In case of trial blades, the smaller curvature radius of the scoop surface was more superior backward throwing of clods and less tillage power requirement in deep tillage.
