Toro TIS-240 User Manual page 73

2. Use a soil probe to check the depth of moist soil as evidence of
the depth the irrigation program is producing. This is very
important in areas showing signs of stress and areas where there
may be too much water. This information will help in defining
which of the following steps should be taken to fine-tune the
irrigation program.
3. If the landscape is green with no signs of stress, the schedule is
adjusted down 10% and monitored. If it is still green with no
signs of stress after one week, it is adjusted down 10% again.
This process continues every week until the landscape shows
signs of stress and then the schedule is adjusted up 5% for a
final adjustment.
4. If the landscape is visibly wet with extremely wet soil, puddles
and runoff, the initial adjustment may need to be adjusted 10%
or 15% down for the first one-week adjustment period and then
the process follows the downward 5% adjustment every week
until minor stress is visible. Once minor stress is noticed, adjust
the schedule back up 5% for a final adjustment.
5. If the landscape shows signs of stress and very dry soil with the
base schedule and continues to show stress following an initial
5% increase, then continue making 5% increases each week until
the landscape shows no signs of stress.
If the landscape is extremely dry or extremely wet, an
6.
adjustment in the precipitation rate may be required. The
following steps will help you identify a proper precipitation rate
for your system.
Compare Site Conditions to Product Specifications
1. Do the heads have head-to-head coverage? Does one head spray
coverage exactly reach the next head (no more, no less)?
If YES, go to next step. If NO, go to Step 3.
2. Do you have access to the manufacturer's sprinkler nozzle data?
If YES, go to Process 1 on page 70. If NO, go to Step 3.
3. Do the heads produce a lot of misting spray (a sign of too much
pressure)?
If YES, go to Process 3 on page 70. If NO, go to Step 4.
4. Is the system less than 10 years old?
If YES, go to Process 2 on page 70. If NO, go Process 3.
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