| 摘要 |
PROBLEM TO BE SOLVED: To provide a direct seeder capable of being simplified in the structure of a detecting means of mud hardness to reduce a cost. SOLUTION: This direct seeder is constituted by installing a land grading float 22 to a seeding device 4 connected to be lifting by power to the rear part of a traveling machine 1, a first sensor S1 for detecting upper and lower displacements of the land grading float, a disc 36 forced to the ground and a second sensor S2 for detecting upper and lower displacements of the disc 36 and a control means for controlling lifting of the seeding device 4 depending on the detected results of the first sensor S1 and the second sensor S2 to detect a mud hardness depending on the results of the first sensor S1 and the second sensor S2. |
