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Hanging Sprinklers for Bench Crops

This Sprinkler Selection Table represents an attempt to simplify a complicated decision making process while at the same time presenting alternatives.  The table has been calculated using one row of sprinklers per bench on a 3 foot sprinkler spacing.  This spacing achieves optimum results by balancing cost, CU (Coefficient of Uniformity) and the percentage of water falling within the designated band.  Priority has been given to the CU.

Other System options:

Upright Systems

Fogging Systems

Cold Frame systems

Download Greenhouse & Nursery Design Catalog PDF (42Mb)

Choosing your hanging sprinkler

  1. Find the width of the area that you want to irrigate.  In most cases the width will determine the sprinkler type.
  2. Determine if you want to apply water at a high or low application rate.  The same color-coded nozzle can be used to create a low precipitation rate as well as a high precipitation rate depending on the width of the band and the height of the sprinkler.
  3. Determine the height above the crop at which you want to hang the sprinkler.
  4. Usually the above three factors will determine the appropriate nozzle size and anti-mist color.  In some cases, a particular factor, such as percentage of water in the band, may determine the other variables such as application rate and sprinkler height.

Recommended nozzle references:

 

 = Green Nozzle with Green Anti-mist
  = Yellow Nozzle with Yellow Anti-Mist
  = Orange Nozzle with Orange Anti-Mist
  = Blue Nozzle with Blue Anti-Mist
Sprinkler Selection Table Sprinkler Spinner Type   Application Rate
Yellow (Flat) Black (Round) Green Kiwi  
Bench Width  
4' 5' 6' 7' 8'
8' 10' 12' 14'
14' 15' 16' 17' 18' 20' 22'
Ht.
Coefficient of Uniformity % (CU)
75 94 94 92 86
96 96 94 90 85
         
       
  93 88  
94 93 88  
93 91 88        
95 95 94 93 94 91  
93 93 93 93 96 94 89
2'
4'
6'
Low
95 95 93 92  
    96 94  
         
89      
91 91 89  
93 90 89 88
93 92 90        
95 95 95 95 95 93  
  94 94 94 94 93 92
2'
4'
6'
High
Percentage of water in Band
68 64 75 85 92
55 60 70 79 86
88 92
63 77 87
86 90 93
70 75 80 83 85 91
66 70 75 79 82 90 92
2'
4'
6'
Low
58 73 85 78
60 68
87
60 73 85
56 68 80 90
85 89 93
67 72 77 81 85 92
67 71 74 79 86 92
2'
4'
6'
High
Precip. Rate (In/Hr)
0.98 1.26 1.25 1.21 1.14
0.80 1.20 1.16 1.12 1.07
0.51 0.71
0.45 0.45 0.42
0.60 0.60 0.58
0.50 0.50 0.50 0.49 0.60 0.58
0.47 0.47 0.46 0.46 0.59 0.58 0.56
2'
4'
6'
Low
1.78 1.77 1.72 1.93
1.71 1.67
1.08
0.96 0.94 0.91
0.90 0.87 0.85 0.82
0.78 0.76 0.75
0.82 0.81 0.81 0.81 0.80 0.78
0.75 0.75 0.75 0.74 0.73 0.71
2'
4'
6'
High
 

Chart is based on 3' sprinkler spacing down the row.

    Download Greenhouse & Nursery Design Catalog PDF (42Mb)

 

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Point Source Irrigation Tel: 559-498-6800
2550 S. East Ave Fax: 559-498-6886
Suite 120 Toll Free:877-228-9774
Fresno, CA    93706 www.pointsourceirrigation.com

Any reference to part numbers, prices and availability of items shown on this web site are subject to change.  Please verify info with your local distributor.

Send mail to tim@pointsourceirrigation.com with questions or comments about this web site.
Last modified: February 10, 2008