110 PLANTING 



to cut and afterwards to replant, the new crop should, if the 

 conditions be not suited to the growth of timber, be intro- 

 duced under a light shelter-wood, and clear cutting should 

 be avoided. This, however, is only possible with shade- 

 bearing species, unless the shelter-wood be very quickly 

 removed. 



When planting large areas, it will seldom be advisable to 

 plant with a view to the whole area being managed under 

 the same system. For as the soil, situation, aspect, and 

 altitude vary, so must the species of trees that should be 

 planted, and so too, in many cases, must the system under 

 which they should be grown. 



Thus on exposed places it may be advisable to grow 

 shade-bearing trees under the selection system, unless the 

 soil be too dry. If the soil be very dry and exposed, even- 

 aged high forest of Scots Pine or Corsican Pine may be 

 indicated. Then again, in some places, if not too exposed, 

 the shade-bearing conifers may be grown under the group 

 system. And on the best land, high forest with coppice, or 

 coppice with standards, or two-storied high forest, will probably 

 be indicated, and so on. 



4. The Advisability or otherwise of a 

 Rotation of Cropping. 



In a general way, there is no necessity to observe in 

 forestry a rotation of cropping, as is necessary in the case 

 of agricultural crops. For soil exhaustion will not follow in 

 properly managed woodlands. 



However, it will often be possible and advisable to plant a 

 more valuable species on land from which a less valuable 

 species has just been removed. 



For instance, mistakes may have been made when the 

 previous crop was originally planted, or originally the land 

 may have been too poor, or the situation too unfavourable, 

 for any valuable, exacting species ; but after the first rotation 

 the soil is improved, so that a more valuable species will now 

 grow ; or again, a tender species which it was not possible to 



