4 
CoivORADO ExPERIMI^NT STATION 
I’.lfalta lieUl is on a side hill, sloi)iiig down to th^ Arllnir Ditch, the 
maxiinnin slope being southeast. The grain held to the north of the 
road, however, has not as great a slope but it is similar in character to 
the orchard and alfalfa held mentioned above. 
«/' -Si'S 
Fig-. 1. 
DESCRIPTION OF SYSTEM 
It will be noted from Fig. i that the snbirrigation system as in¬ 
stalled consisted of a main supply line of 6-inch porous tile, running 
from the outlet of the drain connected wdth and supplying water to the 
four concrete wells, or boxes, marked A, K, U, \^, W and X. Details 
of these boxes are shown in Fig. 2. 
