| No. of plot. 
Kind of 
crop. 
Altitude. 
IRRIGATION EXPERIMENTS IN IDAHO. 
Class of soil. 
inclusive. 
Length of irrigation 
season. 
Number ofirrigations. 
Total depth irrigation 
water applied. 
Precipitation April- 
Date of first irrigation. 
September, 
Alfalfa. - 
Deep uniform clay loam... - 
bosses Ose cocbhecdoopsouDpoaa 
nee COR ee Seer he ae 
Ww bo bo 
Sara 
Ww OO 0 09 0D tO 
OOOO OOO 
OorPwWNr © 
WN NNNNNNN 
ee i 
why hy bt 
Www wu 
Nejeiielie) Oowo 
CO Ore CW Noro 
Nee. 
wNywmnnr 
OOr WWF © 
ey 
shee 
wr 
wD 
= . 
aa) 
NNre 
not ty 
ow ccmoworn 
Nee 
G02 09 OO OO co Ww OO Oo Go OO www wwe Go Oo 02 09 GOW 
OOOOOO oowo ooo oowo ooo Nelvleliellelvelielie) 
WON orp lorie 
a 
NNNNNN NN 
VARIATIONS IN IRRIGATION REQUIREMENTS OF SOILS. 
Lg 
Taste VIII.—E fects of different volumes of water on grains, alfalfa, orchards, potatoes, 
and sugar beets during the season of 1913—Continued. 
Yield per acre. 
vee 
10, 601. 16 
9, 685. 07 
10, 410. 06 
11, 705. 09 
13, 989. 16 
15,022.34 
A study of the results secured indicates that the porosity of the 
soil is one of the most important factors influencing the irrigation 
requirements of soils, and for the purpose of comparison the soiis 
have been divided into two classes, according to their physical charac- 
