CORDON TRAINING. 



85 



" We know that the forms most generally employed for es- 

 palier pear trees are such that it is necessary, for a wall of 

 eight feet in height, to wait sixteen or eighteen years be- 



fore the trees entirely cover the surface which is intended for 

 each tree, that is, of fifty or sixty square feet. It is too 

 long to wait for the maximum product of the trees, for during 

 this time the interest upon the cost of the land and the con- 

 struction of the wall, as well as the expense of keeping the 

 same in order, is so great that the crop affords a very in- 

 suflScient remuneration. 



