408 



SEEDING AND PLANTING 



b. On hard, compact soils it is difficult to bring the soil into 

 contact with the roots in closing the hole. 



c. They cannot be used on areas covered with grass or other 

 herbage or with litter. 



d. The roots are crowded together in a single mass or else 

 spread out in a single plane; conditions which may be harmful on 

 certain soils. 



e. Areas where the soil is filled with roots and stones cannot be 

 satisfactorily planted. 



/. The opening is so narrow the roots are likely to be doubled 

 backward in setting the plant. 



-o 



--O 



a 



a. Planting peg. 



b. Knob-grip dibble. 

 T-grip dibble. 



Fi(j. 1 14. Types of dibbles. 



c. 



d. Pistol -grip dibble. 



e. Spade-handle dibble. 

 1-5. Cross sections of openings 



10. PLANTING WITH TOOLS WHICH MAKE THE OPENING IN 



THE SOIL IN THE FORM OF AN INVERTED CONE OR PYRAMID. 



The simplest implements for making openings in the soil for the 

 purpose of setting small trees are the dibble and planting peg (Fig. 

 114). A great variety of dibbles are used for this purpose. They 

 differ greatly in the ease with which they can be forced into the 

 ground. Dibbles are made of wood or iron or a combination of 

 the two. 



