A knife assembly mountable to a frame of a seeder comprises a knife shank having a proximal end and a distal end, the proximal end of the knife shank adapted to be directly or indirectly attached to the frame; a knife blade removably attached at or near the distal end of the knife shank; and a tube holder having a groove along a portion of its length, the groove designed to slidably receive a corresponding ridge on a flexible drop tube so that when a portion of the bottom of the flexible drop tube is worn, the flexible drop tube can be pulled from the bottom to slide down the groove and the worn portion can be cut off, the tube holder being attached at or near the distal end of the knife shank behind the knife blade so that both the knife blade and the flexible drop tube can be removed individually.

An automatic precise pneumatic plug tray seedling device comprises a body, a plug tray platform, a seed groove, an air pressure source, a control device, a conveyor device, a soil punching device, and a seed device. To become an automatic control of a closed loop of a pneumatic cylinder, it adjusts the input control signals through the track positioning control in the control device and the feedback signal conveyed by the conveyor device.

An automatic precise pneumatic plug tray seedling device comprises a body, a plug tray platform, a seed groove, an air pressure source, a control device, a conveyor device, a soil punching device, and a seed device. To become an automatic control of a closed loop of a pneumatic cylinder, it adjusts the input control signals through the track positioning control in the control device and the feedback signal conveyed by the conveyor device.

An equidistant hole marking device for blueberry cultivation in a solar greenhouse is provided, which relates to the field of hole spacing marking technologies. The device includes a trigger rod, and the trigger rod is L-shaped. Four groups of moving rods are disposed outside an inner rod, the moving rods are diamond, and the moving rods are made of a plastic material. A circular pressing member is fixed outside each group of the moving rods, an upper side and a lower side of each circular pressing member are inclined, and the circular pressing members are made of a plastic material. When discharging powder, the moving rods and the circular pressing members are controlled to move inside a storage member, so that caked powder is crushed and discharged smoothly, thereby to improve marking efficiency.

An equidistant hole marking device for blueberry cultivation in a solar greenhouse is provided, which relates to the field of hole spacing marking technologies. The device includes a trigger rod, and the trigger rod is L-shaped. Four groups of moving rods are disposed outside an inner rod, the moving rods are diamond, and the moving rods are made of a plastic material. A circular pressing member is fixed outside each group of the moving rods, an upper side and a lower side of each circular pressing member are inclined, and the circular pressing members are made of a plastic material. When discharging powder, the moving rods and the circular pressing members are controlled to move inside a storage member, so that caked powder is crushed and discharged smoothly, thereby to improve marking efficiency.

A bracket for use with an agriculture planter including a trailing arm frame defining a pivot point thereon may include an arm bracket assembly with first and second arms. Each arm may extend from a middle portion of the bracket. First and second implements may be rotatably mounted on mounting ends of two of the arms. The middle portion of the bracket may be pivotally coupled to the trailing arm frame at the pivot point.

A bracket for use with an agriculture planter including a trailing arm frame defining a pivot point thereon may include an arm bracket assembly with first and second arms. Each arm may extend from a middle portion of the bracket. First and second implements may be rotatably mounted on mounting ends of two of the arms. The middle portion of the bracket may be pivotally coupled to the trailing arm frame at the pivot point.

A planting apparatus of nursery tree includes an auger, a guide member having a hollow tube shape, a blade member, sliders, and motors The auger, the guide member and the blade member form the nested structure of the three-layer which are centered upon the auger, and the auger and the blade member are rotation members rotating on the same vertical axis line. By such a constitution, desired planting hole can easily be excavated, and the ground around the excavated hole and a root clump of the nursery tree can be leveled, covered and pressed by the blade member without forming a gap while holding the nursery tree by the guide member not to be inclined.

A planting apparatus of nursery tree includes an auger, a guide member having a hollow tube shape, a blade member, sliders, and motors The auger, the guide member and the blade member form the nested structure of the three-layer which are centered upon the auger, and the auger and the blade member are rotation members rotating on the same vertical axis line. By such a constitution, desired planting hole can easily be excavated, and the ground around the excavated hole and a root clump of the nursery tree can be leveled, covered and pressed by the blade member without forming a gap while holding the nursery tree by the guide member not to be inclined.

An agricultural seed planter is provided. The agricultural seed planter has a large diameter rotating planting wheel with fingers or teeth spaced around the periphery of the planting wheel. The teeth are positioned so as to achieve a spacing of the seeds when planted in the soil. The teeth have a small dimple in the end and an even smaller hole passing through the entire length. The dimple provides a place for the seed to sit in and the small hole allows positive or negative air pressure to be transmitted to the seed. The negative air pressure creates a vacuum suction that attaches the seed to the teeth, and the positive air pressure releases the seed from the teeth. In an example implementation, the wheel includes many individual mechanical modules that are linked together to form the wheel.