A seedling transplanting system is provided that utilizes a seedling feeder that is configured to fit between a tray of seedlings contained within a series of chain pots and a hydroponic trough. The feeder includes a ramp and a chute that direct the seedlings from the tray into the trough. A pair of guide surfaces, which form ramp sidewalls, help the seedlings to self-right as they are drawn into the hydroponic trough. A restraining jig aids in establishing and maintaining the relative positions of the seedling tray, feeder and trough during the transplanting process. A pulling tool simplifies the transplanting process by providing means for pulling a pair of media strips along with the captured chain pots into the hydroponic trough.

A seed delivery device including a frame defining at least one seed chamber. The frame includes a sidewall and an air permeable floor. Seed can be received and deposited on the air permeable floor through an input port. An air input channel is utilized to introduce an air stream into the seed chamber and direct it through the air permeable floor such that seed is lifted from the air permeable floor to an outlet port. An air bypass channel is configured to separate the air stream into a first stream that is directed through the air permeable floor and a second stream that is directed through the bypass channel and recombined with the first stream, at a point prior to the output port.

The devices, systems, and methods herein use air pressure to dispense seed into the ground in a controlled manner. In certain embodiments, a valve is actuated to push a single seed out of a seed chamber. The seed can be conveyed from the metering housing and through a seed delivery apparatus to the furrow at high speed. The seed is rapid conveyed from the seed chamber to the furrow by a precisely controlled air pulse to eliminate variation and enable high planting speeds.

An inductor box for an agricultural implement having compression limiters. One inductor box includes a housing having a first side configured to receive an agricultural product from a tank. The first side has a sealable surface, and the sealable surface has plates attached thereto. The inductor box includes a first gasket disposed on the sealable surface and configured to establish a seal between the sealable surface and a corresponding surface of the tank. The plates are configured to extend through respective openings in the gasket, and to block compression of the first gasket beyond a desired compression limit.

A sectional control device (12) controls the flow of particulate material from a meter (28) assembly to a primary manifold (24) of an air seeding system. The sectional control device (12) includes a plate assembly (56) having particulate openings (36A, 36C, 36) extending between the meter (28) assembly and the primary manifold (24) and a shut-off mechanism configured to control the flow of the particulate material through the particulate openings (36A, 36C, 36). The shut-off mechanism includes a gate (44A, 44) configured to slide between an open position, where particulate material can flow through the particulate opening (36, 38), and a closed position, where particulate material is prevented from flowing through the particulate opening (36, 38). The shut-off mechanism also includes an actuator (40A, 40) configured to drive the gate (44A, 44) between the open position and the closed position. A sectional control device (12) controls the flow of particulate material from a meter (28) assembly to a primary manifold (24) of an air seeding system. The sectional control device (12) includes a plate assembly (56) having particulate openings (36A, 36C, 36) extending between the meter (28) assembly and the primary manifold (24) and a shut-off mechanism configured to control the flow of the particulate material through the particulate openings (36A, 36C, 36). The shut-off mechanism includes a gate (44A, 44) configured to slide between an open position, where particulate material can flow through the particulate opening (36, 38), and a closed position, where particulate material is prevented from flowing through the particulate opening (36, 38). The shut-off mechanism also includes an actuator (40A, 40) configured to drive the gate (44A, 44) between the open position and the closed position.

Metering devices for an agricultural implement are provided for applying a field input, for example, pneumatically delivered granular product including seed or fertilizer or sprayed liquid product including fertilizer and the like, to an agricultural field. In the applying of the field input, the rate of application of the dispensers of one section of the implement can be collectively varied in relation to the rate of application of the dispensers of a different section of the implement frame.

An agricultural air seeder planting unit incorporates control valves that split flow and change direction from supply to distribution hoses. The flow area of the control valves is automatically adjusted pneumatically by movement of a piston in response to total pressure to provide a uniform velocity flow from each of the control valves.

The present inventors have recognized that a pressure gradient or differential in a product distribution line for conveying granular particulate material, such as seed or fertilizer, in an air flow to an agricultural field consistently decreases as air speed (velocity) in the product distribution line decreases until a critical air speed is reached. Below the critical air speed, the particulate material may become susceptible to falling out of the air flow to potentially cause a blockage in the system. Accordingly, a control system can implement a process for efficiently determining an optimum operating velocity for an air flow that is above the critical air speed yet below a maximum air speed associated with inefficient operation. In one aspect, the optimum operating velocity can be stored as a value corresponding, for example, to the type of particulate material and/or rate at which the particulate material is metered for subsequent use.

The present inventors have recognized that a pressure gradient or differential in a product distribution line for conveying granular particulate material, such as seed or fertilizer, in an air flow to an agricultural field consistently decreases as air speed (velocity) in the product distribution line decreases until a critical air speed is reached. Below the critical air speed, the particulate material may become susceptible to falling out of the air flow and potentially causing a blockage in the system. Accordingly, a control system can retrieve from a data structure a predetermined air flow setting indicating an optimum operating velocity above the critical air speed yet below a maximum air speed associated with inefficient operation. In one aspect, the predetermined air flow setting can be retrieved based on the type of particulate material and/or rate at which the particulate material is metered.

A seed trench depth sensor is adapted to mount to an agricultural implement. The trench depth sensor determining the difference between a distance measured to a bottom of the seed trench by a first sensor and a distance measured to a surface of the soil by a second sensor disposed rearward of the first sensor.