Jason Lorenz

Agro Engineering Inc.

When and Why Re-Nozzle Visible pattern problem

Loss in yield

Reduced quality

Equipment maintenance Worn or broken orifice, pads, bracket, regulator

Change in water supply conditions Changing aquifer(change in pressure and flow), change

in pumping plant

Improvement in technology, increasing uniformity/efficiency Impacts sprays oscillating nozzles

Visible Problems

The ring affects 3 acres. The yield map showed a 100 cwt/acre reduction. At $9.75/cwt a loss of $2925 in one ring

Equipment Maintenance Worn orifice = overwatering/ uneven depth applied

Worn pads = uneven / reduced overlap

Broken bracket = uneven pattern/ loss of function

Worn pressure regulators = overwatering/ uneven depth applied

Plugging issues

Change in water supply conditions Sprinkler Uniformity

0.20

0.40

0.60

0.80

1.00

1.20

0 200 400 600 800 1000 1200 1400

Distance Along Lateral (ft)

Ca

tch

Ca

n D

ep

th (

in)

CP

ED

Mo

de

l

925 gpm @30 psi 725 gpm @ 18.5 psi

Improvement in technology

0.5

0.55

0.6

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

0 200 400 600 800 1000 1200 1400

Distance

Dep

th A

pp

lied

Sen Spray Sen Iwob

Spray vs Oscillating

Important Factors System flow and pressure

In season changes

Center pivot characteristics

Overlap

Spacing

Nozzle height

Nozzle type

Pad selection

Pressure regulated?

End of system decisions

Nozzle Height vs Spacing

Nozzle Height vs Spacing

Nozzle Type Spraying Rotating Oscillating

Photo From “Nelson R3000 Brochure” Nelson Irrigation Corp.

Photo From “Nelson O3000 Brochure” Nelson Irrigation Corp

Photos & graph From “Senninger i-Woband Xi-Wob UP3 Brochure” SenningerIrrigation Inc

Photo From “Senninger Super Spray UP3 Brochure” Senninger Irrigation Inc.

Photo From “Nelson D3000 Brochure” Nelson

Irrigation Corp.http://www.nelsonirrigation.com/products/family/pivot-sprinklers/s3030-spinner

Nozzle Type

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0 5 10 15 20 25 30 35

Spray Rotator Occilating

Pad Selection

Pad Selection

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0 5 10 15 20 25 30

Medium Groove Deep Groove

Spray Pad Selection

Photo From “Senninger Super Spray UP3 Brochure” Senninger Irrigation Inc.

Table From “Nelson D3000 Brochure” Nelson Irrigation Corp.

Rotator Pad Selection

Table From “Nelson R3000 Brochure” Nelson Irrigation Corp.

I-Wob Pads

Photos & Tabler From “Senninger i-Wob UP3 Brochure” Senninger Irrigation Inc

Xi-Wob Pads

Photos & Tabler From “Senninger Xi-Wob UP3 Brochure” Senninger Irrigation Inc

Orbiter Pads

Table From Nelson O3000 Brochure” Nelson Irrigation Corp.

Nozzling with Pressure Regulators Flow rate remains constant as long as minimum

pressure requirement is maintained.

Inlet pressure 5 psi higher than nominal pressure.

Pressure Regulator Performance

15

20

25

30

35

40

45

50

700 800 900 1000 1100 1200

Minimum Pivot Pressure 6 5/8" o.d. Pipe

15 PSI 10 PSI 20 psi

Insufficient Pressure

15

17

19

21

23

25

27

29

31

33

35

-300 200 700 1200

Inle

t P

ress

ure

of

Pre

ssu

re R

eg

ula

tor

psi

Distance Along System (ft) 1000 g.p.m. 32 p.s.i.

End of System

End of System

http://www.nelsonirrigation.com/products/family/end-of-pivot-solutions