JPH056977B2 - - Google Patents
Info
- Publication number
- JPH056977B2 JPH056977B2 JP63293475A JP29347588A JPH056977B2 JP H056977 B2 JPH056977 B2 JP H056977B2 JP 63293475 A JP63293475 A JP 63293475A JP 29347588 A JP29347588 A JP 29347588A JP H056977 B2 JPH056977 B2 JP H056977B2
- Authority
- JP
- Japan
- Prior art keywords
- irrigation
- culture medium
- water
- water level
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y02P60/216—
Landscapes
- Hydroponics (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63293475A JPH01317342A (ja) | 1987-11-30 | 1988-11-22 | 自動灌水制御装置 |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-299824 | 1987-11-30 | ||
| JP29982487 | 1987-11-30 | ||
| JP63293475A JPH01317342A (ja) | 1987-11-30 | 1988-11-22 | 自動灌水制御装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01317342A JPH01317342A (ja) | 1989-12-22 |
| JPH056977B2 true JPH056977B2 (en]) | 1993-01-27 |
Family
ID=26559436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63293475A Granted JPH01317342A (ja) | 1987-11-30 | 1988-11-22 | 自動灌水制御装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01317342A (en]) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6719488B2 (en) | 1999-12-22 | 2004-04-13 | Ebara Corporation | Soil pf value measuring method, and irrigation control method and irrigation control device |
| KR100864475B1 (ko) * | 2007-05-07 | 2008-10-22 | 경기도농업기술원 | 순환식 수경재배용 배액 전극법 관수시스템 및 그수경재배방법 |
-
1988
- 1988-11-22 JP JP63293475A patent/JPH01317342A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01317342A (ja) | 1989-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |