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Table 11-9.-A guide to recommended nozzle sizes and pressures with expected average CU values for different application rates and sprinkler spacings under low wind conditions (0 to 4 mph) SprinkIer Spacing ft X ft Operation 0.10 0.15 Nozzle, inch 3/32 3/32 Pressure, psi CU, % Water application rate, iph f 0.02 iph Nozzle, inch Pressure, psi CU, % NozzIe, inch Pressure, psi CU, % Nozzle, inch Pressure, psi CU, % Nozzle, inch Pressure, psi CU, % Nozzle, inch Pressure, psi CU, % Nozzle, inch Pressure, psi CU, %
Table 11-10.-A guide to recommended nozzle sizes and pressures with expected average CU values for different application rates and sprinkler spacings under moderate wind conditions (4-10 mph) Sprinkler Water application rate, iph f 0.02 iph Spacing ft X ft Operation 0.10 0.15 0.20 0.25 0.30 0.35 0.40 NozzIe, inch 3/32 3/32 7/64 118 9/64 5/32 9164x3132 30 X 40 Pressure, psi 30 50 45 45 45 40 40 CU, % 82 85 85 82 83 84 85 Nozzle, inch 3/32 7/64 118 9/64 513 2 11164 1 1/64 30 X 50 Pressure, psi 40 40 45 50 45 45 50 CU, % 70 75 84 84 84 87 85 Nozzle, inch 1 I8 9/64 5132 11164 3/16 3/16 30 X 60 Pressure, psi 40 45 45 45 45 50 CU, % 80 84 84 84 85 86 NozzIe, inch 7164 118 9/64 118x3132 5132x3132 5/32x3/22 5132xli8 40 X 40 Pressure, psi 30 35 35 40 35 40 35 CU, % 80 83 83 83 84 87 86 NozzIe, inch 5/32 5/32x3132 5132x3132 11164x3132 31 l6x3l3Z 40 X 50 Pressure, psi 35 35 45 40 40 CU, % 76 76 76 83 84 Nozzle, inch 40 X 60 Pressure, psi CU, % Nozzle, inch 3116 13164 7132 7132 114 60 X 60 Pressure, psi 60 65 65 80 68 CU, % 80 82 83 84 84
Page 1 and 2: United States Department of Agricul
Page 3 and 4: Application intensity .............
Page 5 and 6: Advantages Some of the most importa
Page 7 and 8: End-Tow Lateral An end-tow lateral
Page 9 and 10: Figure 11-4.-Solid-set sprinkler la
Page 11 and 12: or for dual cropping, it is practic
Page 13 and 14: Planning Concepts A complete farm s
Page 15 and 16: I. Crop (Type) (a) Root depth (ft)
Page 17 and 18: Sample calculation 11-1,-Computing
Page 19 and 20: 11-rfi Such systems are capable of
Page 21 and 22: Table 11-2. Effective crop root dep
Page 23 and 24: Impact sprinklers produce a circula
Page 25 and 26: n n = mean depth of observations (i
Page 27 and 28: 11-24 I. Increases of 20 to 40 perc
Page 29 and 30: plants is similar for all systems.
Page 31 and 32: 1. At the lower side of the specifi
Page 33 and 34: diameter based on average wind spee
Page 35 and 36: LATERAL SET A L 50 FEET LATERAL SET
Page 37: such as forage crops, According to
Page 41 and 42: Table 1 l-12.-A guide to recommende
Page 43 and 44: I. Crop (type) (a) Root depth (ft)
Page 45 and 46: F F I k% TabIe 11-13.-Nozzie discha
Page 47 and 48: 1‘ HOSE-LINE ’ A-Fully portable
Page 49 and 50: A-Layout on moderate, unifbrm Slope
Page 51 and 52: such cases, lines are laid on the c
Page 53 and 54: .I* en factor (F) based on the numb
Page 55 and 56: Figure Il-33.-lateral laid downhill
Page 57 and 58: This is obviously outside the 20 pe
Page 59 and 60: Table 11-17.-Typical as % 3 -. " 3
Page 61 and 62: Table 11-19a.-Friction-loas J value
Page 63: one of selecting mainline pipe size
Page 66 and 67: ft; for D3 and Dz, friction loss in
Page 68 and 69: The standard capital recovery facto
Page 70 and 71: Step 4.-The WHP savings needed to o
Page 72 and 73: 1. Economic method-Selection of the
Page 74 and 75: Table Il-24.-Comparison of total an
Page 76 and 77: ial, and then determine the total a
Page 78: Table 11-28.-Values of resistance c
Page 82 and 83: can be solved very simply from equa
Page 84 and 85: sure is representative of the entir
Page 86 and 87: turer at the given pressure. This o
Page 88 and 89:
Table 11-30.-Typical discharges and
Page 90 and 91:
This allows for a 1-hr set time, 20
Page 92 and 93:
ftlmin. The required sprinkler disc
Page 94 and 95:
R *= maximum radius irrigated when
Page 96 and 97:
sprinkler pattern. High instantaneo
Page 98 and 99:
Where soil sealing and infiltration
Page 100 and 101:
Thus, to compute the (Hfk, with two
Page 102 and 103:
And the net depth of application as
Page 104 and 105:
Machine Selection Ultimately the ty
Page 106 and 107:
Span I Container Span Position Weig
Page 108 and 109:
Sample calculation 11-20.-Using fie
Page 110 and 111:
Span Container span No. Position We
Page 112 and 113:
4. Increasing system pressure and r
Page 114 and 115:
Figure 11-60.-A method for adding f
Page 116 and 117:
Table Il-35.-Steps for estimating f
Page 118 and 119:
Frost Control Operation For complet
Page 120 and 121:
Installation and Operation of Sprin
Page 122 and 123:
T actual operating time (hrlday) t
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