The Almond in CaliforniaTaylor, R. H. (Ralph Hawley)
Science
The Almond in California
Taylor, R. H. (Ralph Hawley)
Almond -- California
Whether the top-working shall be done by budding or grafting depends
largely upon the wishes of the grower and the skill of the workman.
Grafting will give a new tree more quickly than budding, because by the
latter method a year is lost in growing a supply of new wood on the stubs
into which the buds must be placed. By grafting, the new scions may start
growing the first spring without any delay. Ordinarily the best method
is to graft the trees the first winter and then, where the grafts fail
to grow, buds may be inserted in the new growth which will come from
the stub. During the first two seasons especially, great care must be
exercised to keep out the sprouts that interfere with the growth of the
scions. At the same time, all water-sprouts should not be removed during
the first summer or there will not be sufficient leaf surface to perform
the necessary functions of the tree. In addition, the scions tend to grow
so rankly that they will be top-heavy and much more liable to be blown
out by the wind, as shown in figure 6. This may largely be prevented by
pinching the ends of the new scion growth during the early summer to
force lateral branching. At the end of the first year all water-sprouts
should be removed leaving nothing but the growth from the scions.
[Illustration: Fig. 6.—Twenty-seven-year-old trees deheaded two years
before, showing the break-off of the new growth by strong winds.]
PLANTING
The usual preparation given land for orchard purposes prior to planting
should be applied to land being prepared for almonds. Special care must
be given to insure thorough aeration of the subsoil by breaking up all
hardpan, plow-pan or other compacted layers in the soil, where possible.
[Illustration: Fig. 7.—Almonds planted twelve feet apart. Trees in very
weak condition and almost entirely defoliated by mites before harvest.
The few nuts ripening on the trees are small “sticktights.” Photo taken
September 21, 1915.]
_Distance._—Almonds in most soils should be planted 30 × 30 feet on the
square. In rich, deep soils the trees quickly fill the intervening space,
the roots occupying the entire soil area long before the tops touch. In
poor, shallow soils, or soils deficient in available moisture, the trees
may not occupy the entire area above ground, but the roots will require
more horizontal feeding space to enable them to make the size trees and
bear the crops that they should.
Trees planted too close together often abstract the moisture from the
soil before the growing season is completed. This shortage of moisture,
with the aid of mites, commonly called red-spider, causes the loss of
the leaves long before they normally should drop. Under such conditions
the fruit buds are unable to make the vigorous growth which they should.
These weak buds are unable to endure the degree of frost or other
unfavorable conditions that stronger ones withstand without serious
injury.
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