One Thousand Questions in California Agriculture Answered Part 53

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Fertilizing Pear Orchard.

I have pear trees 15 years old which have fruited heavily for years and have never been fertilized. What is the best fertilizer for the soil which is heavy, and when is the best time to apply it? I intend planting rye to plow under in the spring, but thought possibly the fertilizer should be applied first.

If you have stable manure available, nothing could be better for the feeding of the trees and for its mellowing effect upon your heavy soil.

Application can be made at once, to be worked into the land when the rye is sown. It will help the trees and give you more rye which in the end will help the trees. If you have no stable manure available, what is called by the dealers a "complete fertilizer" for orchard purposes is what you should use and apply it when you work the land for rye.

Fertilizing Olives.



What is the best means of fertilizing an olive orchard? My orchard gives me a perfect quality of oil, but a poor quant.i.ty. My soil is dry calcareous, red and gray, and is very thin in places, therefore, it lacks moisture.

An olive orchard can be fertilized with stable manure or with a "complete fertilizer," or with the special brands of different manufacturers of special fruit fertilizers. But you must be sure that your trees do not need moisture more than they need fertilizers, for without adequate moisture fertilizers cannot do their best work. The increase of the humus content of the soil, either secured by stable manure or by the plowing under of winter-grown cover crops, is desirable, as they not only give the trees more plant food, but make the soil also more retentive of moisture. You will have to experiment along this line to see just what is best for your trees.

Consult the Trees.

Can I send you a little soil out of my one-year-old pear orchard so that you can advise me what I can do to improve its fertility. The trees are fairly thrifty, but as fruit growing is my pleasure I wish to make it a model orchard and add whatever it requires of nitrogen, humus, etc., immediately so as to increase the growth for this summer. Next winter I intend to put manure around them and cultivate about every other month.

Careful experimenting with fertilizers will teach you more than a.n.a.lysis would do, because the behavior of the tree under various conditions tells you more than a chemist possibly could. Besides, we are of the conviction that on good soils young fruit trees should not be pushed beyond the growth which they would naturally make with a regular and adequate moisture supply. Be careful about using fertilizers on young trees, either in the summer or in the winter. When they come to bearing age and yield large crops of fruit, that is another question. Any California soil which will not grow young fruit trees thriftily should not be used for orchard purposes unless an amateur desires to grow trees on a picturesque lot of rocks or sand.

Results of Fertilizing Olives.

We have 100 acres in olives about six miles northeast of Rialto in San Bernardino county. In 1908 we got about five tons from the 100 acres. We began fertilizing and cultivating in 1909, and have put on the 100 acres about the same amount of fertilizer each year. In 1909 we got 15 tons; in 1910, 116 tons, and 1911 is estimated at 325 to 350 tons.

It is important that your olive trees are responding to good treatment and fertilization. Unfortunately, that does not seem to be always the case and a good many olive trees have been made into firewood because nothing seemed to bring them into satisfactory bearing. Good bearing olive trees are now among the very best of our horticultural properties, while non-bearing olive trees are worth about $7 a cord for fire wood.

Nursery Fertilizers.

I have light sandy loam, well drained. It has been in blackberries, and I now have it planted to nursery fruit tree stock. I have given it this spring two applications of nitrate of soda, but no other fertilizer.

Will the nitrate act alone, or must I apply also the phosphate and potash to get results?

Nitrate of soda will act alone and will stimulate growth, and there are cases in which there is enough phosphate and potash already in the soil to act with it. Usually, however, it is customary to use a complete fertilizer containing phosphate and potash as well as nitrogen, in order that the plant may be more roundly supplied and promoted, and one would be a little safer in using that sort of fertilizer than in relying upon the nitrate of soda alone. You will, of course, be careful not to use these fertilizers in too large amounts, for nitrate of soda is especially dangerous if used in excess.

Almond Hulls and Sawdust.

Is there any fertilizing value in the hulls of almonds? Would pine sawdust from the lumber mills be a good substance to mix in and plow under in a three-acre adobe patch in order to loosen and lighten the soil for truck gardening?

Almond hulls have considerable fertilizing value, but they are slow to decompose, and, therefore, may be a long time unused by the plant. They also have a good feeding value for stock, and if you can expose them in the corral so the stock can eat as they like, this is the best way to get them into fertilizing form. If they can be cheaply ground their availability as a fertilizer would, of course, be quickened. Redwood sawdust is better than pine sawdust, but any kind of sawdust can be made to serve a good purpose in mellowing heavy soils if not used to excess and if there is plenty of moisture to promote decay.

Fertilizing Fruit Trees.

I have an orchard of prunes, apricots and cherries, which has been bearing since some 30 years ago, without fertilization, except possibly muddy sediment from occasional irrigations of mountain streams. Various people are advocating the use of nitrates and other fertilizers. Should I have samples of this earth a.n.a.lyzed in order to ascertain what the soil most needs?

To find out whether your trees need fertilization, study the tree and the product and do not depend upon chemical a.n.a.lysis of the soil. 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. each of superphosphate, nitrate of soda and sulphate of potash per acre, but am dissatisfied with my yields as compared with yours in California.

There is not only no standard for fertilizing orange trees, but there is no "ideal" which might be considered as a basis for a standard. All growers who are awake to the necessity of doing something for bearing trees, try all things and hold fast to what (they think) is good.

Practically none of them has any enduring conviction or demonstration as to what is good, but they keep on trying. There is, however, one clear and enduring conviction, and that is, that continuous fertilizing must be done for profit, and our best growers are using the same materials you mention in considerably larger amounts than you apply, and use also other forms of nitrogenous fertilizers. The amounts of superphosphate and nitrate which you use would be considered homeopathic treatment by our growers.

Cow Stable Drainage for Fruit.

I have been told that the drainings from a cow barn make an excellent fertilizer for orange and lemon trees, in fact, anywhere on plants where manure is considered beneficial.

The drainage from a cow barn is excellent for fertilizing almost any crop unless it is used in too large quant.i.ty. If it should be combined with a considerable amount of water used for cleaning out the stable, it would be excellent for the irrigation of all kinds of fruit trees. Care should be taken, however, not to oversaturate the ground, which would be the case if the was.h.i.+ng of the stable was allowed to run continuously alongside a single row of trees. The water should be changed from row to row in succession, cultivating the ground meantime to promote aeration and to prevent too great compacting of the soil.

Seed Farm Refuse as a Fertilizer.

One Thousand Questions in California Agriculture Answered Part 53

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