Can anyone tell me more about micro-irrigation for hydropnic systems in tropical regions.

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Please check this link, Hydroponic Culture for the Tropics: Opportunities and Alternatives
Merle H. Jensen
Department of Plant Sciences
University of Arizona
Tucson, Arizona 85721, U.S.A., 1991-05-01
http://www.fftc.agnet.org/library.php?func=view&style=type&id=2011072917...

Dear Keron .. rather than looking at only economizing and optimising water .. it will be best to use the basic principles of precision agriculture .. micro irrigation is just one of many tool for the same.. and as suggested by Volker it is one of the most effective ways of having noncirculating irrigation in hydroponics . thats where it will be more useful. .the ability to be precise shoudl be the focus and water optimization only a part of the whole.. usualyl in India NETAFIM is the best supplier for such solutions

Solar Water pumping and drip irrigation has transformed the desert State of Rajasthan, India into a high yield horticulture crop producing region. More than 17,000 solar water pumps have been installed and the number is growing with each passing day. Plz google Rajasthan solar water pumping program. It is perhaps the World's largest solar water pumping program. It may be of help to you.

Keron, The International Center for Biosaline Agriculture (ICBA) specializes in this field of Hydrophonics : u can browse some of their work at : http://biosaline.org/

HELLO KERON,

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YOU MAY ALSO VISIT www.alibabaa.com, FOR FINDING SUPPLIER IN YOUR REGION.

YES, IN FACT, THAT IS HOW THE WEALTH OF INFORMATION, ON THE WEB COULD HELP.

DO PLEASE KINDLY FEEDBACK, ON YOUR CONCLUDING RESULTS.
RGDS,

The easiest way to grow Pak Choi is in non-circulating hydroponics. If your cultivar matures within 1 month, you do not even need to adjust pH and you only need polystyrene boxes and water-soluble fertilizers. If duration is longer, you should have a pH meter and an acid like phosphoric acid to adjust pH at approximately 30-day intervals.