164 TKANSACTIONS OK ROVAL SCOTTISH ARHORICULTURAL SOCIETY. 



correct, the figures show very [)lainly that the loss from a thin 

 crop not only arises from the deficiency of growing stock, and 

 the inferiority of the quality of the timber, serious as these may 

 be, but that there is a further loss from the ^ma.\\er J>ercefi/age rate 

 of increment, especially in abnormal seasons. In times of heavy 

 rainfall the soil in such woods becomes quickly saturated, and 

 the trees are thus much more exposed to windfall if a gale should 

 happen to accompany or to follow heavy rain. In a saturated soil of 

 this kind, a heavy spring rainfall may also mean a delay of perhaps 

 two or three weeks at the commencement of the growing season, 

 before the soil is sufficiently warmed for growth to commence. 



The following table was given in last year's article but is now 

 repeated for reference, and below it is given a correspondmg 

 table givinsj the second season's results. 



1910 



1911 



Planta- 

 tion 



Estimated 



present 



growing 



stock 



ciib.ltT 

 1200 

 1320 

 2800 

 1730 



1251 

 2700 

 141 I 

 2916 

 1797 



Number 



of 



stems 



per acre 



710 

 4 SO 

 280 

 2S0 



710 

 700 



280 

 2S0 



Average 

 diameter 



6-2" 

 6-8' 



1 1 -5" 

 IO-4" 



Mean 



annual 



increment 



6-3" 

 8-6" 



7-2" 

 1 1 7' 

 10-5' 



cub. ft. 



41 

 70 



43 



34 

 71 

 43 

 71 



44 



Present 



rate of 

 growth 



4-24 



6-95 

 4-16 



4-27 



475 

 3 '29 

 6-58 



3-54 

 2-59 



Current 



annual 



increment 



cub. ft. 



51 



91 



116 



67 



59 

 89 

 93 

 10.? 

 46 



The rainfall during the growing season of 191 1 was as 

 under : — 



.May 



June 



July 



August 



September 



16.380 



73 



In 1 910 the rainfall during the same period was 20*180 inches, 

 falling on 72 days. The summer was exceptionally fine with two 

 or three periods of very hot weather. As already mentioned, how- 

 ever, there was no period of prolonged drought such as proved 

 so disastrous in other parts of the country. The longest periods 

 without rain were from ist to i6th June and 5th to 15th July. 



