D6 ELEMENTARY FORESTRY. 
board is changed to the other side of the row first planted and 
the planting is continued in the same way. (C and D) Such 
close planting as this is only desirable when it is intended to 
give special care to the plants, as by shading or watering. 
Plants should not remain more than two or three years in so 
close a bed before they are transplanted. When it is desirable 
to set out small seedlings in rows, instead of beds, a tight line 
may be used in place of the board. 
Heeling in. This term is applied to the temporary covering 
of the roots of trees with earth to keep them from drying out 
after they are dug and until they are planted. If they are to be 
kept for only a few days, comparatively little care is needed in 
Figure 16. Successive steps in planting young evergreen or other 
very small seedlings. (a) Board in place and trench partly opened. 
(b) Seedlings in place and partly covered. (c) New trench partly 
opened. (d) New trench with seedlings in place. 
covering; but if they are to be kept for several weeks, or over 
winter, especially if the weather is dry, great care must be taken 
to work the fine soil in among the roots and to pack it solid. A 
good way of doing this is as follows: Select a dry, mellow piece 
of ground, and dig a trench just large enough to take in the 
roots of the trees when laid close together in a single row. 
Place the trees or seedlings in this trench. in an upright position, 
afew at a time, and cover the roots firmly and deeply with soi 
taken from close in front of the first trench, thus making a trench 
for the next row. In this section, if Maples, Cherries and other 
trees not of the greatest hardiness are to remain heeled in all 
winter, it is a good plan to bend the tops down and cover with 
