





SPRAY’ IRRIGATION. wl 7 Ue 831 
Table 3 shows the number of feet which should be added to the lift 
for each 100 feet of straight pipe to overcome the friction and to ob- 
tain the total lift which must be pumped against. Tables 2 and 3 
should be used by the farmer for estimating purposes, while the pro- 
pertioning of the pipe sizes in the final design should be done by an 
irrigation engineer or by the manufacturers of the spray equipment 
used. 
TABLE 3.—Numober of feet to be added to the vertical lift for each 100 feet of 
common iron pipe to overcome “ friction head.” 
{Based on Williams-Hazen formula, using a coefficient of 100.] 


























Size of pipe. 
Gallons x iis 
per J i 
minute.|  3- 1- i. 1i- 2- 1. 3- _33- 4- 5- 6- 7- 8- 
inch. | inch. | inch. | inch. | inch. | inch. | inch. | inch. | inch. | inch. | inch. } inch. | inch. 
Feet. | Feet. | Feet. | Feet. 
ipa lS NOS Mey Pare ie Osd Ne sa 
OY esas 14.7 4.55 20 al ees cee 
Se esari 0 25.0} 7.80] 1.59} 0.95 
HOB eee 38.0 | 11.70 2.05 1. 43 
112) SG ae ee 16. 40 4.30 2. O01 
i ane feat | 22.00! 5.70] 2.68 
TAGs PSI Fis We 30) aoe aL 
FUR eee | ey Sa Me alia kD 9.10 4, 24 
PAO) Besta FEMS eel epee Rs 11.10 5. 20 
OAS RA Pee NN i ae 16. 60 7. 80 
Bt (Jape | ant at age Pate saan 23.50 | 11.00 
EBS ok alpen a ge re Fa a asi 
AMO) 2 AS PR ED aD SIRI A ea | SP 18.8 
GG) 2 ats lI Ua ee 2352 
EQ) 5 Se II eat | oa cal Lee 
4.08 1. 80 1.00 BAA cisco nach ae | eee 
4.96 DED) 1. 22 1) Ligh feat la is Wee ey [AR 
7. 00 3.10 Ue Zab 58 (Da Jat eke Da 
9.2 4, 20 2. 28 . 76 30) oe Alesse 
Sin abe 2.91 .98 SO eels eo 
14.8 6. 30 3. 61 1. 22 C87 idl Visbaeee sii | A Gut Ts A 
17.8 Use 4.40 1. 48 - 56 OF285 Paes 
(Dee rare Ber a NR) TUNING a ch | ac LM Tah a Leap RN i 21.3 9.6 ey US Ces . 69 ie a Peale Ws 
11.6 6.2 2. 08 - 83 .39 0. 22 
13433 2 2. 41 .95 nad. 
1a 74 8.2 PUM 1.10 53 28 
17.8 9.3 Seas |aele 26 62 33 
2.6 12.90 4.19 1.68 - 82 45 
16. 0 5. 40 2.10 1.03 56 
19.8 6. 70 2.52 1. 24 71 
24.0 8.10 3.15 1.50 84 
DIO) Bae Se Sea ee ae ee esate BRNO ACG ATS EIR EH EI Aas FA PRL HOP aR Ue HOE 9.6 Solr dst 1:01 
BC aperonneten beeps penne Ure Rect set(baart gh eres RPE EL | Ss URC FDI BU SCT IA ane a crac UIC ae 11.3 4. 35 2.18 1. 20 
55) (epee Vs mNGN nea N Pensa eli NE ond eGR a eee RUS ills Dac eee EN Oe i eae 1133, 2) 4.90 | 2.50 1. 40 
TROD ees 5 PN Gia eae alas ee EA A AI a tab cl fait gn 15.1 5. 80 2. 90 1.60 
ESD) so SST ER A I a See aU REA EN) Stes Fe eA EVR aah Ue esa Up Rp On ea 17; 2 6.60:| 3.30 1.78 
ODS a eR RA at a Pie gta Fv tec eta Ae Fe eae tise Le 19.4 7.50 | 3.65 2.00 
SEN) Sagem a rns aL eesg a et Sy Tarts | AE VIRG RIL (PP Sw NI RTA So GIT Aas ANA OTA MICS A PHA; 8. 40 4. 20 2. 26 
LOO 2.5 2 ISR Ie TREE A SERN) ATAU eos at ec 7 Nem eGt 1 FiO) ny Vigne, esd peal Ra. SSE Ra ee a A 9. 20 4.50 2. 50 
TE so ose eee a hs aged le AN ketal Neo a iG gunn Weil al Geet eC lla ee ee CaN Sy 10.1 .§.10 2. 80 
SUPE COs) are | pe psec eee | A ST MG CV CRNA HSCS ESSA a i el Sane a tS TAN i CT ai ee Se GN 5. 60 3. 10 



Table 4 is a bill of materials for the typical farm (fig. 1, p. 4), 
and is given as an example of a form for obtaining quotations on 
spray irrigation equipment (see also fig. 12, p. 19). “ Run” means a 



