Proceedings of the 8th International Congress on Soilless Culture, Hunter's Rest, South Africa, 2-9 October 1992
For open system: Irrigation control: automatic or manual, irrigation frequency; pH control: equipment, technique, frequency ... acid, alkali used, actual results for feed, medium, and run-off - average, range, and extremes; EC control: equipment , anbsp;...
| Title | : | Proceedings of the 8th International Congress on Soilless Culture, Hunter's Rest, South Africa, 2-9 October 1992 |
| Author | : | International Society for Soilless Culture |
| Publisher | : | - 1993 |
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