| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | METHOD FOR IRRIGATING AND FERTILIZING RICE | US12471068 | 2009-05-22 | US20100294181A1 | 2010-11-25 | Jacob L. LaRue; Germani Concenco |
| A method for irrigating and fertilizing rice using a sprinkler irrigation system. The method includes the steps of providing a sprinkler irrigation system, determining an amount of water to be applied to the rice, determining an amount of fertilizer to be applied to the rice, and applying the water and fertilizer to the rice through the sprinkler irrigation system. Depending upon rainfall, the irrigation water may be applied to the rice an average of about one to two times per week between its planting and emergence, about two to three times per week between its emergence and its panicle initiation stage, about three to five times per week between its panicle initiation stage and its initial ripening stage, and about three to four times per week between the rice's initial ripening stage and its harvest. | ||||||
| 22 | Chassis for farm implements | US3568776D | 1968-06-24 | US3568776A | 1971-03-09 | VASSBERG CHARLES J |
| A farm implement having a first beam provided with a hitch including a universal joint and being slidable along a tow bar with the joint directly over the bar to insure sliding without binding during turning of the implement. A second beam is pivoted to the first beam for swinging between two operating conditions extending in opposite directions at an angle from the path of travel of the implement. The rear end of the second beam is supported by a steerable wheel assembly and the front end of the beam is provided with a depth gauge wheel which is automatically moved into either of a pair of corresponding operating positions responsive to said swinging of said second beam to said respective conditions.
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| 23 | Spirally arranged toothed cultivator wheel | US2669148 | 1948-05-14 | US2650460A | 1953-09-01 | NEWHOUSE GEORGE A |
| 24 | Disk cultivator | US19564627 | 1927-06-01 | US1762844A | 1930-06-10 | BEISSEL P G |
| 25 | Disk harrow | US72590024 | 1924-07-14 | US1649336A | 1927-11-15 | LOUIS BRENNEIS |
| 26 | Harrow | US3388525 | 1925-06-01 | US1570154A | 1926-01-19 | JOHNSON OLOF H |
| 27 | Harrow attachment for cultivators | US40097620 | 1920-08-03 | US1544632A | 1925-07-07 | BRANSON VERNE L |
| 28 | Harrow | US65531223 | 1923-08-02 | US1544442A | 1925-06-30 | ERIK GADDA |
| 29 | Harrow | US35848120 | 1920-02-13 | US1389512A | 1921-08-30 | JUOPPERI MATHIAS E |
| 30 | Harrow | US37010420 | 1920-03-31 | US1366819A | 1921-01-25 | MILLER EDWARD R |
| 31 | Harrow | US31482319 | 1919-08-02 | US1355494A | 1920-10-12 | MATZ CHARLES F; MATZ MICHAEL G; KERPER BERNARD V |
| 32 | Tractor-harrow-operating mechanism | US29610019 | 1919-05-10 | US1341824A | 1920-06-01 | REYNOLDS ARTHUR W |
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