A6 BULLETIN 339, U. S. DEPARTMENT OF AGRICULTURE. 
crops. The table confirms the conclusion reached from Table X, 
that normal projects are about equally divided between (1) hay and 
pasture and (2) grain and other miscellaneous crops. 
The number of acre-feet diverted each month by each system was 
determined and computed, and Table XXIII shows the number of 
acre-feet diverted for each acre irrigated during each month of each 
season. : 
TaBLE XXIII.—Quantity of water diverted for each acre irrigated during each month of 
irrigation season for ten different canals. 
Acre-feet diverted for each acre irrigated. 
Name of canal. Year.| April— Sep October— | Total. 
May. | June.| July. cate tem- 
1-15 ous || ber 
-15 | 16-30 1-15 | 16-31 
IUIVEESIO Ost ones ene ee 1911 | 0.08 | 0.43 | 1.40 | 1.46 | 1.54 | 0.79 | 0.79 | 0.50 | 0.15 7.14 
OR En Cat ae eee Rie SS 1912 11 63 | 1.74 | 1:98 | 1.99 | 1.19 } 1.23 62 00 9. 49 
Farmers’ cooperative. ..-.-.-..- 1911 4 SS leo Ly a SOM Sl LOs ls 44a lees 28 19 5. 52 
Oe ee cen ae aN 1912 00 OS OTe e263 94 ee Osu |eeroo 17 10 4.76 
Warmers, WiaIOW = eee eae eae 1911 TCD) ast Rely LPs Teal th ak 2s |! = Sey || cls 13 00 5. 66 
One ae Nee oe ene 1912 Sh = Aisi) der |) de2es | LOy | 468 |) oes 00 00 5. 53 
Scutlersse sates ae ere 1911 04 | .16 42 | of SAM Se 224 11 00 3. 04 
OS 32 Stes aes Saeco 1912 00} .01 49 | .69} .7 54] 134 10 00 2. 87 
IBOISes Valle yee see are ee ee 1911 leh lo SZ G35 |) oa!) 64) .42] .30 12 00 Sait 
OPO oe nee tet bees 1912 00; .00 46} .50 iH | | Sets ||. oak 00 00 2. 39 
IBY UETG eeaeeor es ts Sore (eae ee 1911 00 | .05 338) || aS 34] .35]| .34 03 02 1. 84 
IONE Chee eases = yee 1911 | .11 40 91} .97} 1.09) 1.01] .8 12 00 5. 44 
ID YS aan tenant ae ees I pie! (OO) |) aI TS 1) A TI OB3 |= GOs || er 31 00 6. 02 
Rand ait ees eee ase 1912 00 00 00 | 1.58 | 2.25] 1.99] .81 25 00 6. 88 
Clark and Edwards ............ 1912 00 00 31 | 2.59 | 3.00 | 2.67 | 2.04] .34 00 10. 95 
South Side Twin Falls.......... 1912 | .10 14 603|/e1SHO0 | Rt 23 8 las | ees Ols ee22, 16 5. 29 
OL BeS sa cen eee Sees ame 1913 | .09 11 83) 1512) 25 aS 21s enon 20 17 5. 71 
Average for month. ......|_-..2- Bede eg 77H |e ose) MePAL Taya) Soi = SGyel) See IE Oe: 5.39 
Per cent of season’s diver- 
SIQME = Soe te ecto ne stecebe 1.49 | 4.08 tee 22. 43 ae 83 |16.5 |12.43 | 3.71 | .93.} 100.00 
The investigation has demonstrated the adequacy of 2 acre-feet 
(p. 32) for diversified crops on clay loam soils, provided there is no 
waste, and the measurements of the use of water by the farmers in 
typical districts show that more than 2.5 feet per acre is seldom 
delivered to or used upon the land. The quantities diverted by the 
above projects, however, which represent the normal use in Idaho, 
show that they divert much more than is required for the crops on 
the farm. A comparison of these diversions with the quantities 
required and used on the farms would indicate (1) that water is 
wasted by the canal systems both early and late in the season; (2) 
that a considerable supply is required for domestic purposes and stock 
water; and (3) that the losses from seepage and evaporation in trans- 
mission, and from careless use, must be far larger than many have 
realized. The quantities shown as having been diverted per acre in 
the preceding tables are known to be very nearly accurate, and, con- 
sidering the fact.that it has been found necessary to divert these 
quantities under normal Idaho conditions, these data must be given 
careful consideration when designing projects with scanty water 
supplies. Pe ASS SEE ea, eee 
