perfection of both air and soil drainage; nearness to 

 and the effect of bodies of water; the position, kind 

 and effect of wind-breaks. 



Tliere were so many trees planted, protected, ferti- 

 lized and cultivated in so many different ways that we 

 found it impossible to make a correct percentage or 

 graph for any of the above topics, except banking, 

 killed and killed back, and these only for the Satsuma 

 and grape fruit. Lemons, sweet, sour and navel or- 

 anges were planted in small areas around dwellings, 

 barns, chicken lots, etc. and under such other varied 

 conditions that no accurate graph could be made. The 

 kumquat was also planted around dwellings, barns, 

 chicken lots, etc. for the turn rows and along fences 

 under such different conditions that no graph could be 

 made. 



For the collection of the data from whicli this bulle- 

 tin is compiled we are indebted to Dr. R. Van Idcrstine, 

 John W. Pace, Colin McDonald, T, F. Johnson, Leon- 

 ard G. Payne, Robert W. Porter, Robert M. Mahler, 

 and their assistants in the Citrus Canker eradication 

 work and the hundreds of growers who so willingly 

 gave the necessary information. 



MAP EXPLANATION 



Since the freeze injurj^ reported in this bulletin oc- 

 curred, it has been the opinion of some of the citrus 

 growers of South Alabama and perhaps is still the gen- 

 eral opinion of the casual observer, that trees planted in 

 all hollows and low places suffer much heavier losses 

 from freezes than trees which are on elevated areas. 

 The graphs and maps on pages 7 and 8 are intended 

 to give the growers suggestive corrections for this mis- 

 taken idea, especially in a hilly district, whereas in a 

 more level district, swamps may act differently as 

 shown by Plate III and fig. 1 of Plate IV. 



Generally speaking, losses from freezes may be heav- 

 ier in hollows and low areas than on elevated areas. 

 But when these increased losses occur it is generally 

 due to either lack of air drainage or the presence of a 

 wind-break or wind-stop, proximity to a swamp or a 

 combination of these conditions. Cold damp air will 

 settle in low places adjacent to these surroundings. 

 Just so far as this cold damp air extends be it in low 

 or elevated places, those areas will suffer losses in pro- 

 portion to the dispersement of the cold still damp air. 

 See graph, page 7. 



