FROST PROTECTION. 363 



ground, at the corners of a rectangle, enclosing the tree. 

 Around these posts good, stout cloth is stretched and at- 

 tached to a frame at the bottom. The top of the struc- 

 ture is covered, as illustrated on the right, with a frame 

 covered with the same cloth. This cover is removed and 

 the cloth sides lifted up in opening the tent. 



Tents afford an excellent method for protecting a 

 few trees. Citrus trees might be grown as ornamental 

 trees in gardens about the home, far outside the regions 

 where they are cultivated commercially, if tents are used 

 to protect them. The objection to their use in commercial 

 groves, however, is that they are too costly, and have to 

 be enlarged too frequently. For protecting young trees, 

 they have many desirable features, and are probably 

 sufficiently economical. 



Tents alone will not protect the trees. In fact, it may 

 be colder inside the tent than outside. The tent must be 

 warmed up, for which purpose some sort of kerosene lamp 

 is usually most serviceable. An ordinary lantern may be 

 used or a lamp made from a can with a burner attached 

 may suffice. 



SHEDS. 



Both in Florida and California, sheds have been 

 erected to protect citrus trees from cold. In some cases 

 these have proved quite satisfactory, in others they have 

 not. If properly managed, there is no reason why the 

 shed should not prove satisfactory. Provision must be 

 made for allowing the entrance of plenty of light and air, 

 a shed which may be opened or closed in a short time is 

 the ideal. The shed should be left open as much as pos- 

 sible, closing it only on the approach of severe cold. The 

 methods of cultivation and fertilizing must be changed. 



