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Micro-Tal system

2,298 bytes added, 05:20, 30 May 2012
[[Image:micro-tal.jpg|thumb|right|300px|Micro-Tal drip system. Drawing: [http://www.ein-tal.com/index_files/Page704.htm Ein-Tal Micro Drip Ltd.]]]

The Micro-Tal system was developed by Ein-Tal Micro Drip Irrigation Ltd. in Israel. It is a gravity system that is adapted to take advantage of the benefits of the drip irrigation method without requiring an expensive water pressure system. The main feature of the Micro-Tal drip system is the low flow rates of 0.1–0.5 l/ h per emitter under low gravity pressure controlled by water heads up to 1 m. The very low flow rate (one-tenth of that of the ordinary drip) means that it takes 6–10 hours to supply the daily amount of irrigation water to a plant through the drip emitter. Another major difference with systems discussed earlier is the drip line, which is assembled by connecting in-line emitters with segments of 4-mm tubing. The gravity filter used in this system is also unique to the Micro-Tal.

==Construction, operations and maintenance==
'''System components'''<br>

* 920-litre drum
* Gravity filter
* Capillary micro-tube with 4 mm outside diameter
* Low flow inline drip emitters
* 16 mm PE pipe
* 16 mm x 4 mm connectors.

'''Assembly instructions'''<br>

# Prepare a 60 m x 20 m garden to be irrigated by making planting beds as required.
# Lay out a 16-mm PE pipe along the longer sides of the garden (feeder lines) and every 20 m connect the feeder lines with 16 mm pipe. This makes a network water delivery system that essentially divides the garden into three 20 m x 20 m units.
# Locate the tank at the upper end of the garden. Unroll 20 m lengths of the 4 mm capillary micro-tube along the length of the garden.
# Cut the 4 mm micro-tube according to crop spacing and connect the in-line Micro-Tal drip emitters.
# Connect drip lines to feeder lines with female connectors using the snap-in collar.
# Connect the set to a drum on a platform 0.5–1 m high.
# Connect the gravity filter inside the drum.

==Reference manuals, videos, and links==
* [http://www.ein-tal.com/ Ein-Tal Micro Drip Ltd.]

==Acknowledgements==
* Sijali, Isaya V. [http://www.samsamwater.com/library.php?serie=RELMA%20Technical%20Handbook%20Series DRIP IRRIGATION: Options for smallholder farmers in eastern and southern Africa.] RELMA, 2001.
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