THE VEGETABLE GARDEN 261 
Earthing. By this method the plants are set on a 
level. As they grow, the leaves are held together and 
the earth is gradually drawn around the base of the 
plant. The earth should not be drawn up so that it 
Fic, 148, Blanching Celery with Boards 
will cover the heart of the plant, for if any soil reaches 
the heart, it will cause the tender stalks to decay. 
Trenching. Trenching is illustrated in Fig. 144. Dig 
a trench twelve inches deep; fill it to within six inches 
of the top with soil that has been mixed with well- 
rotted stable manure. Set the plants on a little ridge 
along the middle of the trench. As the plants make 
their growth, hold the leaves together and draw the soil 
