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BETTER FRUIT 



PilgC I^ 



the liguri's l).\ one huiiilieil. i«iving us 

 the growtli reeoid I'roin one hunih'eil 

 shoots, e;ich with ten hiteiiil buils. (It 

 is of course not imagined that any 

 bearing tree would present exaetlv the 

 conditions here assumed. 'I'he slioots 

 of' trees are not of uniform lengtli; all 

 do not respond in the same way, even 

 though jMuned hack relatively the same 

 amount. Many factoi\s enter to cause 

 individual variation and the pruner 

 will, to a certain extent, take these 

 factors into considerati(m, pruning one 

 shoot heavily to check or subordinate 

 it, another lightl.\- to encourage it, etc. 

 Nevertheless there seems to be no gootl 

 reason for believing that our theoret- 

 ical example of a tree with one hun- 

 dred .shoots, each shoot having ten 

 e(|ually-spaced lateral buds, would be- 

 have in a manner materially difTerent 

 from trees as we find them. Indeed, it 

 is believed that on the average they 

 would behave alike. It is only by tak- 

 ing theoretical cases of this sort that a 

 simple comparison of results between 

 different methods of pruning iiia\ be 

 readily made.) 



From the one hunderd old shoots we 

 would obtain two hundred new shoots, 

 three bundled new fruit-spurs, and 

 have left two hundred dormant buds. 

 It would seem that the net result of a 

 light heading back is practically to 

 double the original number of shoots, 

 and also to develop i|uite a large num- 

 ber of new fruit-spurs. 



Next, let us see what results we may 

 expect from a heavy heading back. By 

 heavy heading back we will assume 

 that there is meant the removal of the 

 terminal sixty per cent of the shoot 

 grow'th of the season. Again assuming 

 a tree with one hundred .shoots, each 

 possessing ten etiually-spaced lateral 

 buds, heavy heading back would leave 

 four hundred latei'al buds on the shoot 

 growth of the past season. The com- 

 paratively heavy heading that these 

 shoots would receive would have a 

 tendency to force out a large number 

 of the buds left into shoot growth, thus 

 leaving a smaller number for the de- 

 velonment of the spui's antl a still 

 smallei- numbei- to remain dormant 

 than in the case of light heading back. 

 Probably a >enr's growth on the one 

 hundred heavily pruned shoots would 

 result in approximately two hundred 

 and fifty new .shoots, one hundred 

 and fifty spurs — fifty buds remaining 

 dormant. 



Comparing the results from light 

 with those of heavy heading back, it 

 will be seen that both practices result 

 in a great increase in the number of 

 shoots and also a moderate increase in 

 the total numbei- of fruit-sinirs. Of the 

 two practices, heavv heading back af- 

 fords the greater stimulus to vegetative 

 growth, hut less of a stimulus to s])ui' 

 formation. 



Light Thinning Out vs. Heavy Thinning 

 Out 



.\ light thinning out of the theoretical 

 tree (we are assuming a thinning out 

 that is e(|ual in the amount of growth 

 removed to the light heading back) 

 would leave sevent> of the one hundred 



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shoots, and these seventy .shoots would 

 not be pruned in any way. E!ach of 

 these seventy shoots possesses not only 

 ten equally-spaced lateral buds, as was 



assumed before, but a terminal bud as 

 well. When growth begins in the 

 spring the terminal buds are usually 

 the first to start, and it is a matter of 









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OreBi-fSra. ^ ^ 



FinuBH 17 — An old BailliMt pear tree tlial lias bec'inie IMIed with niiich- 

 branched fruit spurs. Many of Uiose spurs are very weak and laekinj; in 

 \ i^or ami produce flowers and fruit very irregularly, only onee in li\f 



and leii years 



