If
your trees are growing thriftily and have sufficiently goodsized leaves
of good color, and if fruit of good size and quality is obtained, it is
not necesssary to think of fertilization. If the trees are not
satisfactory in all these respects, the first thing to do is to
determine whether they have moisture enough during the later part of the
summer. This should be determined by digging or boring to a depth or
three or four feet in July or August. The subsoil should be reasonably
moist in order to sustain the tree during the late summer and early fall
when strong fruit buds for the coming year will be finished. If you are
sure the moisture supply is ample, then fertilization either with stable
manure or with commercial fertilizers containing especially nitrates and
phosphates should be undertaken experimentally, in accordance with
suggestions for application made to you by dealers in these articles,
who are usually well informed by observation. When you have the tree to
advise you of the condition of the soil, you do not need a chemist,
although if the tree manifests serious distress and is unable to make
satisfactory growth the suggestions of a chemist may be very helpful.
Fertilizing Oranges.
What is the general and what do you consider the ideal, manuring, and
when applied for orange trees from 15 to 12 years old under irrigation?
I use about 2 cwt.
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