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Fruit Growing

18 To 20 Inches Above The Ground
A Wrong Idea Of Inter-planting
Acres Of Oranges To A Man
Aged Peach Trees
Almond And Peach
Almond Planting
Almond Pollination
Almond Seedlings
Apple Budding
Apple Root-grafts
Apples And Alfalfa
Apples And Cherries For A Hot Place
Apricot Propagation
As To Use Of The Land You Lose Time By Growing The Seedlings In Place

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Deferring Bloom Of Fruit Trees

Have any experiments ever been carried on definitely to decide what
causes early blossoming of fruit trees? For instance, have adjacent
trees of the same variety been treated definitely by putting a heavy
mulch around one to hold the cold temperature late in the spring,
leaving the other tree unmulched so the roots could warm up?

It has been definitely determined by the experiments of Professor
Whidden of the Missouri Experiment Station that the swelling of the buds
and starting of the foliage of fruit trees is due to the action of heat
upon the aerial parts of the trees; that is, growth is not caused by
increasing the temperature of the ground and cannot be retarded by
cooling the ground. Experiments with the use of snow and ice under trees
by which the ground has been kept at a low temperature have not
prevented the activity of the tree. The only way known to retard
activity is to spray the tree with whitewash so that the white color may
reflect the heat and prevent the absorption of it by the bark, which is
usually of a dark color and therefore suited to heat absorption.
Retarding of growth is possible in this way for a period of six to ten
days, which, of course, in some cases might be of value, but the
lengthened dormancy is probably too small to constitute it of general
value. In whitewashing, to determine what advantage there is in it in
retarding growth, the tree should be thoroughly sprayed with whitewash
so as to cover all the wood some time before the buds swell. In fact, it
is to prevent the early swelling of the buds that the whitewashing is
resorted to. It is better to make the application, therefore, a little
too early than too late. A specific date cannot be given for it that
would be right in all localities.

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