| 摘要 |
<p>PURPOSE:To uniform the germination and growth of directly sowed seeds and improve the productivity of the direct sowing by forming furrows for the direct sowing in a stable state. CONSTITUTION:Furrow-opening blades 6 in which swallow furrow-forming blades 3 are disposed on a rotation shaft 2 and in which deep furrow-forming blades 5, 5 are disposed on both the sides of each of the swallow furrow-forming blades 3 are connected to a tractor. Notches are disposed on the circumferential edges of the swallow furrow-forming blades 3 and the deep furrow-forming blades 5 are disposed at approximately equal angles, respectively. The furrow- opener is formed so as to be satisfied with an inequality NXL2>L1 wherein L1 is the traveling distance of the tractor per unit time; L2 is the circumference of the rotation shaft 2; and N is the rotation number of the furrow-forming blades 6 per unit time.</p> |
