CLEAR FROM GRASS AND WEEDS. 93 



is necessary to attend in a particular manner to 

 those young plantations Avhere whins have existed 

 previous to the young trees being planted. I have 

 frequently seen large tracts of young plantations 

 entirely ruined from not having been cleared from 

 rubbish in due time; and in such a case, v^here 

 this necessary clearing of the young trees has 

 been neglected, a replanting of the ground must 

 take place before any thing good can be expected. 

 This of course is the cause of a great outlay of 

 money, all which might have been saved had due 

 attention been paid at first. 



The necessary expense of doing this sort of 

 work is but trifling. Upon the estate of Arniston, 

 we employ a man with six young people, from the 

 beginning of June to the end of August, constantly 

 clearing among the young plantations; and I find 

 that where no wliins are, the expenses of keeping 

 clear a young plantation, for the first four years, 

 costs about 16s. per acre ; and where there are 

 whins to contend with, the operation costs about 

 25s. per acre, until the trees rise above them. 



SECTION IV. THE NATURE AND NECESSITY OF 



THINNING PLANTATIONS. 



Thinning is one of the most indispensable ope- 

 rations in arboriculture. The right understantling 

 of the nature and design of thinning plantations 



