THE IRRIGATION OF CITRUS GROVE 'R. 



327 



Sub-irrigation with jointed tile or perforated pipe 

 is not feasible in citrus groves, as the tile or pipe soon 

 becomes plugged by the fibrous roots. In a few cases 



cement tile has been used, 

 but in most cases the water 

 is conducted to the trees 

 by means of iron pipes laid 

 beneath the surface so as 

 not to interfere with culti- 

 vation. From these, stand- 

 pipes, provided with taps 

 or spraying nozzles, are 

 brought up near each tree. 

 In irrigating by steam en- 

 gine or gasolene power, the 

 water may be pumped di- 

 rectly into the pipes. Gen- 

 erally the power provided 

 is not sufficient to irrigate 

 the whole area at one time. 

 The taps in one section are 

 opened and the ground is 

 thoroughly moistened. This 

 accomplished, they are 

 closed and another set is 

 opened, and so on until the 

 whole grove receives its 

 quota of water. 



Soils provided with a 

 comparatively compact clay sub-soil at a depth of eighteen 

 to twenty-four inches may be irrigated by the furrow sys- 

 tem, as described further on. If water is conducted to the 

 grove under pressure in iron pipes, it may be sprayed upon 



Mg. 73. Spraying- stands used in 

 Florida, provided with Japanese 

 and Cyclone nozzles. 



