Certainly, raise the branches of the orange trees by removing the lowest branches or parts of branches which reach to the ground.  A little later others will sag down and this under-pruning will have to be continuous.  It would be better to do this than to undertake any radical removal of the lower branches.  The progressive removal as becomes necessary will not appreciably reduce the fruiting and will be in many ways desirable.

Keeping Citrus Trees Low.

My tangerines last fall shot up like lemon trees — a dozen to twenty shoots two or three feet high.  The trees are eight years old and are loaded with bloom and some of the shoots have buds and bloom clear to the top.  Some shoots have no bloom.  What should I do with these shoots?  Cut them back like lemons or let them remain?

You must shorten the shoots if you desire to have a low tree.  This will cause their branching and it will be necessary, therefore, to remove some of the shoots entirely, either now or later, in order that the tree will not become too compact.

Dying Back of Fruit Trees.

I have a few orange and lemon trees that are starting to die.  One tree has died on the top.  What kind of spray shall I use?

The dying back of a tree at the top indicates that the trouble is in the roots, and it is usually due to standing water in the soil, resulting either from excessive application of water or because the soil is too retentive to distribute an amount of water which might not be excessive on a lighter soil which would allow of its freer movement.  Dig down near the tree and see if you have not a muddy subsoil.  The same trouble would result if the subsoil is too dry, and that also you can ascertain by digging.  If you find moisture ample, and yet not excessive, the injury to the root might be due to the presence of alkali, or to excessive use of fertilizers.  The cause of the trouble has to be determined by local examination and cannot be prescribed on the basis of a description of the plant.  It cannot be cured by spraying unless specific parasite is found which can be killed by it.

Young Trees Dropping Fruit.

I have a few citrus fruit trees about three years old.  They have made a good growth and are between seven and eight feet high with a good shaped top or head.  I did not expect any fruit last year and did not have any.  This spring they blossomed irregularly at blooming time, but quite an amount of fruit set and grew as large as marbles, some of it the size of a walnut, but lately it has about all fallen off the trees.

There is always more or less dropping from fruit trees.  Some years large numbers of oranges drop.  There may be many causes, and the trouble has thus far not been found preventable.  When the foliage is good and the growth satisfactory, the young tree is certainly not in need of anything.  It is rather more likely that fruit is dropped by the young trees owing to their excessive vegetative vigor, for it is a general fact that fruit trees which are growing very fast are less certain in fruit-setting.  It is, of course, possible that you have been forcing such action by too free use of water.  You will do well to let your trees go along so long as they appear thrifty and satisfactory, and expect better fruiting when they become older.