350 MEANS OF SPEEDY WOODING 



extraordinary quantity of manure is applied, they 

 mil be in a starving condition for several years. In 

 such a case, the only advantage which can be derived 

 from going deeper than the vegetable mould at all, 

 is to furnish earth, which may be sufficient to cover 

 the roots, and in which they may be able to fix 

 themselves. In land, however, which approaches 

 nearer to loam or clay than absolute sand or gravel, 

 there is always considerable advantage to be gained 

 by going to a considerable depth. 



In trenching small patches, where the subsoil is 

 so close as to be impermeable to water, or nearly so. 

 Sir H. Steu art's rule must be observed, namely, 

 not to pierce the subsoil at all, as otherwise each 

 patch will become a pool or sink in which water 

 will be retained, to the very great injury of the roots 

 of the trees. In every instance where the trench- 

 ing cannot go deep enough to furnish a sufficiency 

 of mould for the roots of the trees, the only remedy 

 is to bring earth from other places where it can be 

 spared. In the laying out of new pleasure-grounds, 

 and in building, with which planting, for the pur- 

 pose now under consideration, will in general be co- 

 temporary, this may easily be accomplished, as there 

 will be abundance of spare earth, which it will be 

 necessary to remove in making walks, and in dig- 



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