1
Robert J Monson, Norman A Bauer: Variable rate application system. Chem Equipment Co, Haugen and Nikolai, June 22, 1993: US05220876 (110 worldwide citation)

A variable rate fertilizer spreading apparatus for spreading a precise amount of multiple types of fertilizers upon a field based upon a location in the field. The system comprises a controller accessing a soil map indicating the type of soil for each portion of the field, several fertilizer maps st ...


2
John W Colburn Jr: Soil chemical sensor and precision agricultural chemical delivery system and method. Aguila Corporation, D Arlon Groves, July 23, 1991: US05033397 (83 worldwide citation)

A real time soil chemical sensor and precision agricultural chemical delivery system includes a plurality of ground-engaging tools in association with individual soil sensors which measure soil chemical levels. The system includes the addition of a solvent which rapidly saturates the soil/tool inter ...


3
Layton W Jensen: Individual row rate control of farm implements to adjust the volume of crop inputs across wide implements in irregularly shaped or contour areas of chemical application, planting or seeding. Thomte Patent Law Office, Dennis L Thomte, July 8, 2008: US07395769 (80 worldwide citation)

A farm implement for applying a product to a row crop or a row seeded field wherein the implement has a plurality of spaced-apart product dispensers mounted thereon, each of which is individually automatically controlled. The rate of product being dispensing from each of the product dispensers is au ...


4
Proctor Denver L, Proctor Rudy R: Sprayer with detergent or chemical additive feed. Jet X Corporation, November 6, 1973: US3770205 (72 worldwide citation)

A sprayer connectable to a hose and including a body having a compound four-position valve controlling a primary passageway and two sets of auxiliary passageways. An antisiphon device attached to the body connects the hose to the primary passageway, while an extension tube, also attached to the body ...


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6
Guy J Swanson: Fertilizer injector wing for disc openers. Exactrix, Hovey Williams, February 28, 2006: US07004090 (52 worldwide citation)

Disc openers (14) for use with an air seeder (10), are configured for seeding and fertilizing a field (G). The opener (14b) broadly includes a drawbar assembly (16), a disc assembly (18) including a coulter disc (20) and a gauge wheel (22), a seed boot (24), a fertilizer injector wing (26), a firmin ...


7
Taylor Billy R: Device for distributing chemicals beneath the soil surface and conditioning seed beds. June 1, 1971: US3581685 (49 worldwide citation)

This invention relates to a device which distributes a layer of chemicals within the soil, with minimum disturbance of the soil surface.


8
Ray Rawson, Allen Rawson: One pass seedbed preparation device and system. Unverferth Manufacturing Co, Henderson & Sturm, December 12, 1995: US05473999 (46 worldwide citation)

A coulter blade assembly for use with a farm implement, which assembly comprises a first coulter unit, a second coulter unit, and a third coulter unit, all units mounted to the implement in a triangular arrangement in plan; with the first coulter unit being a lead unit, the second coulter unit trail ...


9
Mick Zoske, Richard D Winter: Farming applicator. Winske, Mark A Litman & Assoc P A, March 9, 2004: US06701856 (43 worldwide citation)

A device is attached to a vehicle, such as a tractor, to deliver slurry into soil. The device has a hinged connector allows side-to-side movement between the vehicle and the main frame. There is at least one coulter attached to the main frame, a retaining wheel and slurry applicator attached to the ...


10
Hansen Clarence M: Sod knife for anhydrous ammonia. Board of Trustees of Michigan State University, December 26, 1972: US3707132 (40 worldwide citation)

A constant attitude sod knife for injection of anhydrous ammonia to the soil which includes a ground opening blade structure, a gas injection tube disposed at the heel or trailing of the blade and covered by a diffusion director vane or wing and subsequently by a tamping or compaction vane or wing w ...