Netafim COOLNET PRO, Handbook

Page: 17 / 48

UPSIDE-DOWN MICRO-EMITTERS HANDBOOK 17
Selecting a micro-sprinkler/emitter
CAUTION
An emitter can be properly selected only after attaining sufficient knowledge concerning all of the
factors of micro-sprinkler/emitter performance as explained above.
The micro-sprinkler/emitter is selected according to:
• The crops' needs
• The soil/substrate
• The grower's objectives
Definition of the following parameters is required:
• The distance between distribution pipes according to the span width
• Required water distribution uniformity according to crop value and expected profit
• Operating pressure
• The height of the micro-sprinkler/emitter above the surface
• The practicable trajectory height
It is not always possible to pinpoint the micro-sprinkler/emitter that perfectly satisfies all the above
prerequisites. In such a case, the most suitable micro-sprinkler/emitter should be selected by weighing the
above parameters according to their relative relevance to the crops' needs and the grower's objectives.
NOTE
Protected crops are extremely intensive, with very high input costs and an expected high return per
unit of area, and therefore a relatively low addition in a distribution pipe or two will not affect the
permission cost per square meter, but will assure significantly more uniform irrigation resulting in a
higher market valued quality crop.
Nevertheless, there are growers who insist on as few micro-sprinkler distribution pipes per span as
possible without taking into account the negative effects it has on the quality and market value of
the crop.
Micro-sprinkler/emitter selection table
Application Micro-sprinkler/emitter See page
Irrigation - full coverage SpinNet™ 19
Irrigation - strip coverage SpinNet™ SD 23
Irrigation above germination tables VibroNet™ 29
Evaporative cooling, rooting and humidity increasing CoolNet Pro™ 31
Under plant cooling MistNet™ 36
MICRO-SPRINKLER/EMITTER SELECTION