210 IRRIGATION PRACTICE 



the distance between furrows is greater. In orchards, the 

 furrows are usually made at the time of the first irrigation. 

 When the trees are young, one furrow is made on each 

 side of each row, perhaps 2 feet or a little more away from 

 the tree. As the tree becomes older and the root-system 



Fio. 51. One-way furrow irrigation. 



expands, the furrow is moved away from the tree until, as 

 the tree approaches maturity and more water is needed, 

 three or four furrows may be made between two rows of 

 trees. The principle in spacing the furrows is that the 

 furrows shall be so close together that the water soaking 

 from the furrows into the soil will meet and thoroughly 



