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Save Water with Rain- Tal Unique Micro Drip Irrigation System

Save Water with Rain- Tal Unique Micro Drip Irrigation System

The Micro-Drip Technology: Development & Products

Israel is a world leader in agricultural technology as a result of its need to maximize productivity from limited fertile acreage and to convert desert lands into cultivated farmland with extremely limited water resources.  Based on its wealth of scientists, engineers and supporting professionals,  Israel accumulated vast experience in agricultural projects and its irrigation technology is recognized worldwide.

The brand name “Ein-Tal” has been one of the leading factors in micro-drip irrigation research and development in Israel. Mr. Peretz Rosenberg was recognized by many as one of the deans of drip irrigation technology in Israel.  His inventions have become standard equipment in the industry.

In the early 90’s, Mr. Peretz Rosenberg has focused on developing micro-drip irrigation solutions for developing countries that lack a basic infrastructure of pressure water supply. One of his inventions, Gravity Drip Irrigation System (“GDIS”), is a leading examples of Micro-Drip’s technology achievement. His idea was inspired at his first visit to China when he noticed how primitive the Chinese irrigation was at that time.

The working mode of the Chinese farmer was based on a tanker cart pooled by a man from a water reservoir to the greenhouse, then the use of buckets to irrigate the plants one by one.

The GDIS concept is based on the idea of water flow directly from the tank into the GDIS tubing merely by force of gravity. No pump is needed and the small elevation of the tank over the ground is enough to provide small hydrostatic pressure for maintaining the flow. In fact, such very low pressure is also advantageous to generate a very low water irrigating flow rate. This method was a real progress for the farmer who installed GDIS: He could “park” the tanker cart near the greenhouse, connect he tube, and the irrigation went on by itself.

Technical Description of GDIS:

The heart of the system is the MD chain, combining 3 mm Micro Tube (MT) with MDs.  The MT is pre-punched at spacing of 33 cm and an MD covers each puncture. The internal tube diameter of 3 mm enables a very low water flow, similar to a capillary. The MD and the puncture in the MT are designed to emit 0.2 Lit/hr under a very low gravity pressure: 0.03 Bar (30 cm high water column). Spacing of 3 MDs per meter permits MD chains of up to 10m, and water flow is delivered from both ends.  The double connection is necessary to keep the entire system in balance. An MD chain structure is shown in Fig. 1 below. A single MD is shown in detail together

Micro-Drip offers the MD chain in two geometrical configurations for irrigation applications:

  1.  MD chains are placed in parallel along rows of the plants. This configuration is used extensively in greenhouses and open areas.
  2.  MD chains are placed as collars around the trunks of the plants. This configuration is used mainly for trees in orchards.

Both configurations can be used with either pressure or gravity water systems for any agriculture or gardening application.  A schematic view of a layout of the MD chains in the Chinese greenhouse, including a Gravity feeding barrel, is shown in Fig. 2 below. The MD chains can also be installed in the longitudinal dimension of the greenhouse . The uniformity of the plants can teach about the effectiveness of MD irrigation.

Today, about 15 years after the Gravity Micro-Drip Irrigation System was invented and over 10 years after its first implementation in China, Ein-Tal MD kits were sold to many developing countries in Asia, Africa and South America.

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