228 CITRUS FRUITS AND THEIR CULTURE. 



Frosts and freezes must not be confounded. Frosts 

 generally occur in restricted areas on clear, still nights. 

 Freezes on the contrary usually follow or accompany 

 storms of wind and rain. Their effects are not local, but 

 they sweep across great stretches of territory. 



Solid timber areas frequently do much toward stay- 

 ing their progress and preventing damage. But these 

 should be opened up sufficiently to allow some movement 

 of air, or a still air space may be created into which the 

 cold air will settle. Moore, in his Hand-book of Orange 

 Culture, recommends clearing the land and the laying out 

 of the grove in blocks, each block separated, from the ad- 

 joining ones by a belt of the native timber. The twenty 

 acre grove of Mr. W. S. Hart, of Hawk's Park, Fla., is 

 laid out in blocks of five acres, separated by belts of na- 

 tive hammock growth, fifty feet wide. Ditches are run 

 along these belts to prevent the roots of the native trees 

 from reaching out into the grove. Mr. Hart has, on a 

 number of occasions, demonstrated the great advantage 

 of this system of planting. So favorably impressed have 

 we been that we can unhesitatingly recommend it to 

 anyone about to locate where frost protection is neces- 

 sary. When open fires have to be resorted to, the heat 

 is confined and becomes much more effective. Cutting 

 off the rays of the morning sun is a point of further 

 importance. If trees have been touched by cold, their 

 power to recuperate is greatly increased by the shade 

 provided in such a location. 



WIND-BREAKS. 



The foliage and fruit of citrus trees may be greatly 

 injured by high winds. In coast regions such winds fre- 

 quently blow almost steadily and great damage is some 



