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| Number | Title | Issue Date |
| 6843020 | Fertilizer spike and method and apparatus for inserting same into soil A fertilizer spike is insertable into soil utilizing a tool having prongs. The fertilizer spike comprises a fertilizer body comprised of fertilizer material having a base end with an outer surface that converges toward a tip end, in which at least two channels are f... | 01/18/2005 |
| 5887663 | Marker-actuated implement control circuit for an agricultural machine Disclosed is a method for controlling the above-ground "raise height" of a seed-planting row unit on an agricultural planter having a row marker, a marker switch and a positioning assembly such as a solenoid valve and hydraulic cylinder for raising and lo... | 03/30/1999 |
| 4289256 | Tramlining device for seed drill A tramlining device is provided for a seed drill having shutters associated with respective seed spouts and controlled by individual fluid pressure operated actuators for improved flexibility in selecting the tramline spacing. The actuators are preferably... | 09/15/1981 |
