IRRIGATION SCHEDULE

Irrigation scheduling is the process of determining when to irrigate and how much water to apply. It depends upon design, maintenance, and operation of the irrigation system and the availability of water. The objective of irrigation scheduling is to apply only the water that the crops needs, taking into account evaporation, seepage, and runoff losses and leaching requirements. Scheduling is especially important to pump irrigators if power costs are high. Common irrigation scheduling approaches includes the following.
1. Irrigation on fixed intervals or following a simple calendar, i.e. when a water turn occurs or according to a predetermined schedule.

2. Irrigation when the neighbor irrigates.

3. observation of visual plant stress indicators

4. Measuring (or estimating) soil water by use of instruments or sampling techniques such as probes.

5. Following a soil –water budget based on water data and / or pan evaporation.

6. Some combination of the above.

Figure shows the centre pivot sprinkle system.

The centre pivot system sprinkle parts and nozzle are in the following.

Supper spray sprinkler for centre pivot irrigation system

Supper spray nozzle from 4 to 25

Supper spray deflector

Supper spray nozzle for centre pivot syste

I perform this experiment in the Al-Wassel Groups for the center pivot sprinkler having length eight towers(171 ft each tower) of 1368 feet, total system 900.00GPM and pivot pressure 36.3 psi with friction c-factor 140.

Good sprinkle irrigation requires:
Understanding of soil-water-plant relationship.
Irrigation timing and amount depends on soil water holding capacity, weather, and crop growth progress.
Adequate design and installation
Proper operation and maintenance
Dedication and commitment of resources to manage.