Fig. 25. The loose mulch 

 on forest soils. 



Fig. 26. The soil-mulch 

 on tilled lands. 



Fig. 27. A home-made planker. 



Fig. 28. Showing the effect 

 of the roller in compacting 

 the surface layer. 



Pig. 29. Showing how the 

 soil-mulch should be re- 

 stored by tillage after the 

 roller has been used. 



