subirrigation การใช้

• Greenhouse subirrigation has been growing in popularity since the 1990s.
• Subirrigation is used in growing field crops such as tomatoes, commercial greenhouse operations.
• Subirrigation has been used for many years in field crops in areas with high water tables.
• It is important in passive subirrigation to wash out the system from time to time to remove salt accumulation.
• In relatively small areas one applies subirrigation whereby the water infiltrates into the soil below the soil surface from pipes or ditches.
• It also appeared in descriptions of the terrestrial agricultural practise of subirrigation in the late 19th century before becoming associated primarily with the cultivation of aquatic plant and animal species.
• An adaption of this system, potentially useful in areas where irrigation may be banned, is underground subirrigation where precise measurements of water is delivered directly to the root system.
• Three basic types of subirrigation system are in general use for potted plants in greenhouses : "'ebb-and-flow "'( sloping enclosures containing pots ); and "'flooded floor "'( special sloped concrete flooring is flooded and drained ).