A width-variable tillage device is provided with a frame and a leading four-bar first guide mechanism connected to the frame. The first guide mechanism has a depth guide element which regulates a height of the first guide mechanism above the ground, and an actuator which actuates the height of the first guide mechanism between a working position close to the ground and an elevated position remote from the ground. The tillage device further has a trailing second guide mechanism connected to the frame and having at least one tool for tillage, and a connecting member which connects the first and second guide mechanisms such that the second guide mechanism follows the height of the first guide mechanism and can be moved in a transverse direction. Furthermore, the tillage device has a width adjustment unit which can adjust a distance in the transverse direction between the first and second guide mechanisms.

A width-variable tillage device is provided with a frame and a leading four-bar first guide mechanism connected to the frame. The first guide mechanism has a depth guide element which regulates a height of the first guide mechanism above the ground, and an actuator which actuates the height of the first guide mechanism between a working position close to the ground and an elevated position remote from the ground. The tillage device further has a trailing second guide mechanism connected to the frame and having at least one tool for tillage, and a connecting member which connects the first and second guide mechanisms such that the second guide mechanism follows the height of the first guide mechanism and can be moved in a transverse direction. Furthermore, the tillage device has a width adjustment unit which can adjust a distance in the transverse direction between the first and second guide mechanisms.

A flange for securing a rotary blade to a shaft that includes a solid plate with: an axially oriented shaft hole substantially in the center of the plate; two or more additional blade holes for securing a blade to the flange; an embossment around the shaft hole, providing a profile for stopping blade rotation about the blade hole; and a depression on the back face of the plate opposite the embossment, which provides a welding surface to secure the plate to a shaft passing through the shaft hole. Also are assemblages that include a flange, such as a blade assembly system for attaching two or more blades to a shaft, a bladed shaft, an attachable farm implement including a bladed shaft, and a powered machine, which includes a bladed shaft.

A flange for securing a rotary blade to a shaft that includes a solid plate with: an axially oriented shaft hole substantially in the center of the plate; two or more additional blade holes for securing a blade to the flange; an embossment around the shaft hole, providing a profile for stopping blade rotation about the blade hole; and a depression on the back face of the plate opposite the embossment, which provides a welding surface to secure the plate to a shaft passing through the shaft hole. Also are assemblages that include a flange, such as a blade assembly system for attaching two or more blades to a shaft, a bladed shaft, an attachable farm implement including a bladed shaft, and a powered machine, which includes a bladed shaft.

A ridge formation method includes the steps of: providing a sieve instrument immediately after a tilling unit configured to scrape soil to throw the soil backward while rotate a rotor having a plurality of soil scraping pieces to cause the tilling unit to travel, the sieve instrument configured to receive the thrown soil to perform a sieve operation; and moving the sieve instrument in a reciprocating manner in a traveling direction to generate an impact on the received soil so that the soil is finely grained, and to separate the finely-grained soil from other impurities, whereby the finely-grained and separated soil is allowed to pass through a sieve mesh and fall onto a ground so that the falling soil is accumulated on the ground so as to form the ridge substantially the same in width as the sieve instrument on the ground.

A ridge formation method includes the steps of: providing a sieve instrument immediately after a tilling unit configured to scrape soil to throw the soil backward while rotate a rotor having a plurality of soil scraping pieces to cause the tilling unit to travel, the sieve instrument configured to receive the thrown soil to perform a sieve operation; and moving the sieve instrument in a reciprocating manner in a traveling direction to generate an impact on the received soil so that the soil is finely grained, and to separate the finely-grained soil from other impurities, whereby the finely-grained and separated soil is allowed to pass through a sieve mesh and fall onto a ground so that the falling soil is accumulated on the ground so as to form the ridge substantially the same in width as the sieve instrument on the ground.

A flange is disclosed herein for securing a rotary blade to a shaft that includes a solid plate with: an axially oriented shaft hole substantially in the center of the plate; two or more additional blade holes for securing a blade to the flange; an embossment around the shaft hole, providing a profile for stopping blade rotation about the blade hole; and a depression on the back face of the plate opposite the embossment, which provides a welding surface to secure the plate to a shaft passing through the shaft hole. Also disclosed are assemblages that include a flange, such as a blade assembly system for attaching two or more blades to a shaft, a bladed shaft, an attachable farm implement including a bladed shaft, and a powered machine, which includes a bladed shaft.

A flange is disclosed herein for securing a rotary blade to a shaft that includes a solid plate with: an axially oriented shaft hole substantially in the center of the plate; two or more additional blade holes for securing a blade to the flange; an embossment around the shaft hole, providing a profile for stopping blade rotation about the blade hole; and a depression on the back face of the plate opposite the embossment, which provides a welding surface to secure the plate to a shaft passing through the shaft hole. Also disclosed are assemblages that include a flange, such as a blade assembly system for attaching two or more blades to a shaft, a bladed shaft, an attachable farm implement including a bladed shaft, and a powered machine, which includes a bladed shaft.

A strip tillage implement includes a toolbar assembly having a central toolbar section and a wing toolbar section pivotably coupled together. The central toolbar section includes a central toolbar, a first central frame member, and a second central frame member, where the first central frame member is spaced apart from the central toolbar along a fore-aft direction, the second central frame member is spaced apart from the central toolbar along the fore-aft direction and a vertical direction, and the second central frame member is spaced apart from the first central frame member in the vertical direction. The wing toolbar section includes a wing toolbar and a wing frame member, where the wing frame member is spaced apart from the wing toolbar along both the fore-aft direction and the vertical direction.

A strip tillage implement includes a toolbar assembly having a central toolbar section and a wing toolbar section pivotably coupled together. The central toolbar section includes a central toolbar, a first central frame member, and a second central frame member, where the first central frame member is spaced apart from the central toolbar along a fore-aft direction, the second central frame member is spaced apart from the central toolbar along the fore-aft direction and a vertical direction, and the second central frame member is spaced apart from the first central frame member in the vertical direction. The wing toolbar section includes a wing toolbar and a wing frame member, where the wing frame member is spaced apart from the wing toolbar along both the fore-aft direction and the vertical direction.