METHOD OF IRRIGATION 



207 



FIG. 46. Orchard irrigation by basin method. 



out of general use, and be retained only where crop, soil 

 or other conditions make it necessary. (Figs. 42-45.) 



124. The basin method. The basin. method is prac- 

 tically identical 

 with the check 

 method. It re- 

 fers to checks in 

 orchards with a 

 tree in the cen- 

 ter of each, and 

 with temporary 

 levees. Earth is 

 heaped around 

 the tree trunks 

 to keep the water 

 away from the 

 bark. This method is used especially in mild climates 

 where fall or winter irrigation is practised. The use of 

 this method is also rapidly decreasing, and is likely soon 

 to pass out of practice. The advantages and disadvan- 

 tages of this method of irrigation are those discussed 

 under the check method. (Figs. 46-48.) ^\^ 



^.-c^;-:-:^-^^-^^.**-,^ 125rThe furrow 

 '* -.7 '* Vi,r~il'L~^i l .jj l iisr JfC' L tuml method. In this 



method of irrigation, 

 small furrows leading 

 from the supply ditch 

 traverse the fields to 

 be irrigated. Water 

 flows down the fur- 

 rows and is absorbed 

 by the soil. Next to 

 the method of flood- 



^ 



FIG. 47. Orchard irrigation by basin method. 



