Third: That the horizontal are the fruitful branches, and the vertical branches are sterile.
Fourth: That too many branches in fruit results in a poor crop and over taxes the tree.
Fifth: That the pruning should vary according to the variety.
Sixth: That the soil, exposure, and altitude, all affect the growth and fructification in a different manner. The richer soil can support
FIG. 9.
THE PINE OR CONE SHAPE.
more vegetation, and hence, in such soil, the tree will require only light pruning, while on a poorer soil, full pruning is necessary including even the horizontals, which have borne fruit some years back.
Trees with a southern and eastern exposure can be allowed to grow higher, than those with a northern and western exposure, as the outlook is warmer.
