104 A MANUAL OF FORESTRY. 



fagots (Fig. 46).* In constructing such a heap, some 

 brushwood is placed in the centre (a) and covered with 

 perhaps three layers of sods (#), then comes a second layer 

 of wood (c), followed by three or four more layers of 

 sods (d). A narrow channel (m) is kept open from the 

 circumference to the wood in the centre, by which the 

 latter is ignited. The effect of burnt turf is not of long 

 duration; manuring with it has generally to be re- 



Fig. 46. 



peated every year ; it acts, however, very favourably 

 upon the physical condition of the soil, somewhat in the 

 same way as humus. 



i. Laying out the Nursery. 



The area of the nursery is divided into compartments 

 of convenient size, generally of the shape of a square or 

 rectangle. The number of compartments depends on 

 the number of species to be grown and the age of the 

 plants when put out into the forest. Assuming the 

 latter to be three years, there should be four compart- 

 ments in each set, to allow each compartment to lie 

 fallow, or be used for the cultivation of a field crop 

 every fourth year. 



* After Heyer. 



