12 FORESTRY WOBK 



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soil on an estate varies greatly, a separate working plan 

 should be drawn up for each class of timber grown, one 

 each for hardwoods, conifers, copse woods, etc. 



In drawing up a working plan, the area should be 

 divided into as many sections as there are years in the 

 rotation, adding one for the year of felling. The area of 

 these sections should be based upon the yield expected 

 from them, so that the yearly income may be nearly 

 equal. To base calculations on area alone would often 

 result in very unequal yearly incomes, as the soil in 

 some sections might be much better than others, and the 

 yield of timber would consequently be better. After 

 the rough plan has been drawn up for the whole rotation, 

 a felling and planting scheme must be drawn up for a 

 shorter period, as the larger plan may need revision from 

 time to time owing to damage from windfalls, fire, fungi, 

 or insects. 



The smaller scheme should cover a period of five or 

 ten years. If a five-year period is selected, another 

 section can be added each year in the place of the one 

 restocked, so that it may be possible at any time to tell 

 what the income and expenditure will be for the next 

 five years; also what plants and material will be required 

 for each year. If the scheme is drawn up for ten years, 

 it should be revised after five years. 



In either case it should always be possible to look five 

 years ahead, so that every detail from felling down to 

 buying seed may be arranged for. 



In the larger working plan all facts and figures regard- 

 ing thinnings and their value and work done to each 



