b. "The next most beneficial practice appears to be the 



use of Fumazone where sub-soiling is not done." 

 (Fumazone 70% EC at 5 gal/A was injected 6 inches 

 deep in 5 foot strips on each side of the trees after 

 planting . ) 



c. "It appears that post plant nematicides improve both 



tree survival and yield but no post plant treatment 

 with nematicides is as effective or as desirable as 

 preplant treatments." 



d. "It is also apparent that sub-soiling after planting 



is beneficial, particularly where herbicides are used. 

 It improves sub-surface drainage and breaks up hard 

 pan layers to allow better root colonization." (The 

 sub-soiling consisted of 3 sub-soil furrows - one 

 down the center between rows and one 5 feet on each 

 side of center in November.) 



9. In Research Bulletin 30, May 1968, Georgia Agricultural 

 Experiment Station, "The effect of sub-soiling on growth 

 and yield of peach trees" we have, 



a. Preplant sub-soiling in March consisted of one furrow 

 in row wliere plants were to be set and one 20 inches 

 out on each side, with furrows 22 inches deep, in sub- 

 soil dry enough to break up well. 



b. During 3 years of measurements, where there was no sub- 

 soiling, trees grew only a little more than half as 

 much as trees where it was sub-soiled. 



c. Over 8 crops, trees in preplant sub-soil yielded nearly 

 twice as much as where not sub-soiled. 



d. After 13 years, 711 trees in preplant sub-soil were 

 alive and only M% in plots not sub-soiled. 



e. A second sub-soiling -- a furrow 4 feet from the trees 

 on each side, a year after the trees were planted, 

 showed no improvement in growth over the single preplant 

 sub-soiling. 



f. The experiment also showed "that once stunted the trees 

 never attained the growth and size of the trees which 

 were able to establish a good root system and grow off 

 rapidly the first growing season." 



10. "A deficiency of any element (N,P, or K) necessary for 



healthy growth may cause increased susceptibility to cold 

 damage . " 



