| 摘要 |
An in-line sub-surface seeding, fertilizing and watering system includes a blade (10) mountable into a header member (112) of a parallelogram linkage (110). A pair of parallel rigid drag arms (116, 118) extend between the header member (112) and a hanger member (114) and are pinned at their respective ends so that rotation of the header member relative to the hanger member on the parallel arms maintains a general horizontal orientation of the header member thereby supporting the blade (10) downwardly in a constant orientation. The hanger member is mountable to a supporting frame (182). A selective actuator such as a hydraulic actuator (138) or selectively controllable spring assembly (147) allows selective control of a downward force urging the blade into the soil. Where the selective actuator is a hydraulic actuator (138) mounted between the hanger member (114) or frame and the parallel arms (116, 118) or header member (112), the actuating linkage may be selectively elevated so as to remove the blade (10) from the soil. |
