STUDIES ON MICRO IRRIGATION SYSTEMS IN GREENHOUSES OF SOUTHERN KARNATAKA
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Date
2019-08-21
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
The study was undertaken in Southern parts of Karnataka to evaluate and to
assess the performance of the different companies drip irrigation systems in Greenhouses.
Introduction about farmers and other details were collected from different dealers of
respective companies. There are different greenhouses selected for the study and Among
them three greenhouses from each companies. The results on the aspect of design
evaluation showed that, 9 greenhouses having good operating system and the 6
greenhouses are not capable to operate the system, which results in poor performance of
the system. The hydraulic parameters such as coefficient of manufacturer variation,
emission uniformity, uniformity coefficient, application efficiency and distribution
efficiency are found to be excellent at both 0.75 and 1.00 kg/cm2 operating pressure for
all the irrigation system of different companies. But the emitter flow variation observed
is acceptable only for company A, company C and company E at 1.00 kg/cm2 operating
pressure only. However it was not acceptable at 0.75 kg/cm2 for all the irrigation
companies. The value of emitter exponent and discharge coefficient varied between 0.37
to 0.79 and 2.72 to 3.34 respectively. which indicates the flow is almost turbulent. Hence
all company drippers were found to be in the range of non-pressure compensating. The
company A having better hydraulic efficiency followed by company B, company C,
company D, and company E. The cost of installation per acre for all the systems was
found to be in the range of Rs. 45000/- to 52000/-.