WAR GARDENS
A Pocket Guide for
Home Vegetable Growers
BY
MONTAGUE FREE
Head Gardener
Brooklyn Botanic Garden
HARPER & BROTHERS PUBLISHERS
NEW YORK AND LONDON
Copyright, 1918, by Harper & Brothers
Printed in the United States of America
Published May, 1918
CONTENTS
| Chapter | Page | |
| Preface | vii | |
I. | The Value of Back-yard and Vacant-lot Gardening | 1 | |
II. | How to Make a Start—Community Gardens | 5 | |
III. | Tools | 10 | |
IV. | The Site—The Soil and Its Preparation | 15 | |
V. | Fertilizers | 26 | |
VI. | The Kinds of Vegetables to Grow | 32 | |
VII. | Planning the Garden | 36 | |
VIII. | Seeds, Seed-sowing, and Transplanting | 40 | |
IX. | Hoeing and Thinning | 47 | |
X. | Staking and Tying | 51 | |
XI. | Insect Enemies | 53 | |
XII. | Plant Diseases | 64 | |
XIII. | The Culture of Vegetables in Detail | 69 | |
XIV. | Harvesting and Storing | 100 | |
| Appendix | 109 | |
The purpose of this book is to state simply and clearly the ways and means necessary to obtain the largest returns from small plots of land.
The conditions are anything but ideal in the case of many plots that will be used as “war gardens.” To tell how to overcome these adverse conditions, either by adapting the crop to soil and situation, or by modifying the soil to suit the crop, is one of the primary objects of this book.
In the writer’s varied experience with back-yard and vacant-lot gardens, questions relating to soils and fertilizers, insects and diseases, when and what to plant, etc., are continually cropping up. Answers to these questions are given here without theorizing or going into needless details.
This is essentially a practical book, designed to help those who desire to raise their own vegetables in a limited space.
M. F.
WAR GARDENS
I
THE VALUE OF BACK-YARD AND VACANT-LOT GARDENING
The National War Garden Commission has estimated that “the people of this country in 1917 produced a crop valued at three hundred and fifty million dollars in gardens cultivated in back yards, on vacant lots, and on other land previously untilled.” This may seem a small amount when compared with the value of the crops raised by the farmers and market gardeners, but it is not to be despised, and it shows that something can be done to increase the food supply by home gardening.
The raising of vegetables at home not only increases food production, but also stimulates the consumption of vegetables, thus releasing staples, such as wheat and meat, for the use of our soldiers and the Allies. This result is attained partly because fresh vegetables are more appetizing than shop-worn products and partly because of the attitude of the raiser, who says, “We have the stuff and may as well eat it.”
The reduction in the cost of living is also a factor that must be considered. When vegetables are bought their purchase price is quite a considerable item in the household budget. Of course if labor is figured in the cost of raising vegetables at home the financial returns are not likely to be large unless you take into consideration the fact that the necessity of paying dues for gymnasium, tennis, or golf is entirely eliminated. Plenty of fresh air and exercise can be obtained in gardening.
Home gardening, too, should help the transportation problem to a certain extent. Most of the vegetables consumed in the large cities are transported a considerable distance, and if those people who eat these much-traveled vegetables raise their own, the transportation system will be relieved to that amount.
The raising and caring for plants is certain to broaden one’s interest. Very few people who cultivate a vegetable-garden, or any other kind of garden, for that matter, are likely to be satisfied until they know something of the physiology of plants, how and why they grow, and the principles underlying successful plant culture. The insects, both beneficial and otherwise, that one becomes acquainted with in the garden also add their quota of interest. The life histories of many of them are strange and marvelous, and it is worth while, both from the point of view of the welfare of the crops and from the educational standpoint, to learn something of their habits.
But it is probably in the larger aspects of the situation that the home-garden movement will ultimately be of greatest value to the nation. America is not a gardening nation judged from European standards, but this agitation for the production of food by every one who has, or can obtain, a plot of ground is going to make us one. Those people who have once cultivated the ground and raised plants will have had their interest stimulated, and when the food shortage is over their activities will find an outlet in the production of flowers, which cannot but result in more beautiful cities and happier citizens.
A healthier population will result from the exercise in the open air and we shall become a less nervous and restless people through our association with the vital soil and living, growing plants.
II
HOW TO MAKE A START—COMMUNITY GARDENS
In casting about for ways and means of starting a food-garden, by all means investigate the advisability of joining up with, or inaugurating, a community garden. There are tremendous possibilities in connection with co-operative efforts in developing vacant lots and making them productive, not in the sense of the real-estate man, but as food-producing plots, designed to reduce the cost of living, and, incidentally, in many cases, to clean up and make presentable what was formerly a neighborhood eyesore.
There are many advantages to be gained by a neighborhood group combining together for gardening operations. Usually it is not difficult in most cities to find large plots of vacant land with owners who are only too glad to have them cultivated. By co-operative effort it is possible to hire a team and plow and have such plots plowed at a trifling expense, whereas by individual effort it is seldom possible to obtain sufficient land to warrant the expense of hiring a team for plowing, even though the plot were large enough for the team to turn around on. A community garden organization can buy garden tools, such as wheelbarrows, wheel-hoes, a sprayer, and other comparatively costly tools, which greatly facilitate the work of caring for the plot, but which it would be impossible or unwise for an individual to buy if he wished to come anywhere near making a profit on his garden. Seeds and fertilizers can be bought to much greater advantage, and more cheaply when obtained in bulk, with the added advantage that of such seeds as tomato, egg-plant, peppers and celery, one packet is usually enough for the whole organization, whereas by individual effort it would be necessary for each gardener to buy his own packet of seed, resulting in considerable waste. Waste is not to be condoned at any time, especially now when seeds of some vegetables are scarce.
I have in mind a community organization a description of which will serve to illustrate what can be done by organized effort of this kind.
A piece of land about three acres in extent was available for cultivation in this case. It was fairly good land, but had served to some extent as a dumping-ground for cellar excavations, and had a considerable amount of rubbish of one kind and another deposited upon it. The principal of an adjacent school decided that this land ought not to remain idle, so he obtained permission from the owner to use it, and then, with some other energetic people of the community, got together and started to do things. The ground was first plowed and harrowed free of charge by the city park department and the largest of the stones removed. It was then decided that the plot should be fenced, in order to keep out cats, dogs, small boys, and other undesirables, and to insure that those who raised the crops should receive the benefit. Material, consisting of two-by-four-inch posts eight feet long, chicken netting five feet wide, and a strand of barbed wire to go around the top, was bought for this purpose at a cost of about $112. The fence was erected by volunteers in their spare time, and six padlocked gates provided, to which each plot-holder had a key. Water-pipe was laid all over the area so that the crops could be cared for in time of drought. The expense incurred for the purchase of pipe and installation, together with that of seeds, fertilizers, and the larger garden implements, was borne by the association. The area was divided into fifty plots each 100 × 23½ feet. Each plot-holder was asked to keep an account of his expenses, and also of the yields obtained. The results are interesting. The average cost of each plot, including expenses incurred for fencing, seeds, fertilizer, etc., was a little over $11; the value of the crops obtained was around $34; giving an average profit of between $22 and $23.
When one considers the smallness of these plots, it must be admitted that the results were worth while, and the whole adventure is very encouraging to those who contemplate a similar enterprise. Of course no allowance was made for the cost of labor involved in preparing and caring for these plots; but to offset this one should remember that the soil was not especially good, the workers not experienced, and then one must take into account the large initial expense of fencing the land, buying tools, etc. This year the expenses will be considerably less and the yields ought to be greatly increased because of the improvement of the soil through the cultivation of the preceding year.
Other advantages of community gardens that may be mentioned are these: there is not so much danger of a plot-holder becoming tired of gardening and quitting before he has harvested his crop; community gardening fosters a spirit of healthy competition, and each gardener tries to have his plot looking a little neater, and to produce larger and better crops, than his neighbor. Furthermore, in a body of men and women associated in this way there is almost always some one who has had a garden before and to whom the novices may turn for advice.
While community gardening is undoubtedly the most economical, and, in many ways, the most pleasurable method for the home gardener to produce his crops, one should not be deterred from the attempt to grow vegetables merely because there is no opportunity to link up with an organization. The man with a back yard can grow some vegetables, provided that his soil is fairly good and his plot is open to the sunshine. Even the apartment-dweller need not despair, because in most cities it is possible to obtain the use of a plot of vacant ground, through either the municipality or some organization formed for the purpose of dealing with such situations.
III
TOOLS
It is unnecessary to spend much money on tools for use in a small garden. The writer did very well in his home garden with nothing but an ordinary round-pointed shovel for digging purposes, a rake to pulverize the soil and make drills for seed-sowing, a scuffle-hoe for cultivating, and a garden line made from two sticks and a piece of twine. Of course there are many tools on the market that greatly facilitate cultivation and make gardening work easier, but their purchase is inadvisable unless the size of the garden and the permanency of its cultivation warrant it.
Nothing will be said as to the various types of horse-drawn or motor-driven implements. This book is written for those who have to do their gardening with hand tools or those who are limited to the hiring of just what horse-drawn tools happen to be available.
For the preparation of the soil, probably the best implement is the spading-fork. It is easier to work with than a spade and in most cases is equally efficient. The spading-fork can be used for digging and, at a pinch, can be made to serve the purpose of fining the surface soil for seed-sowing. A spade is a handy tool to have, however, especially when any work is to be done in the way of making beds or forming walks.
For seed-sowing the absolute essentials are very few. A yard-stick or foot-rule for measuring the distance between the rows is useful. An even better way of accomplishing this is to divide a hoe or rake handle, whichever is used in seed-sowing, into feet and quarter-feet, preferably cutting in the marks with a knife. If one is limited to buying just one tool for making the drills the rake should be chosen, as it can also be used for fining the soil and for cultivating between the rows. A garden line can easily be improvised from two sticks, sharpened at one end, and a suitable length of strong twine.
When the soil is fairly loose and easily worked, a scuffle-hoe is a very satisfactory tool for cultivating the surface. On the other hand, if the ground is hard and stony the ordinary draw-hoe should be chosen. A small hand weeder, which can be obtained at a cost of from ten to fifty cents, is very useful for loosening the surface of the ground close to the rows of young seedlings. Look over the illustrations of these tools in a seedsman’s catalogue and pick out the one most suited to your needs. With a little ingenuity, tools suitable for stirring up the surface soil can be fashioned at home from old hoop iron or stout wire fastened on wooden handles. After a season’s work in the garden you will discover just what you need in this line, and will probably be able to make a tool that will give far greater satisfaction than anything you might buy.
A garden hose of sufficient length so that water can be applied all over the garden is an advantage, but not absolutely necessary. A good rubber hose costs, nowadays, about ten dollars for a length of fifty feet, and a few expenditures of this nature sadly eat into the profits of the garden. As an accessory to the hose a sprinkler throwing a fine spray, that can be left running for several hours, is very useful and desirable, especially if there is no meter attached to your water supply!
When combating insects and diseases in a small garden, a sprayer of the atomizer type holding about a quart of insecticide and costing between one and two dollars is very valuable. In a garden of considerable extent, or in a community garden, insecticides and fungicides can be economically and efficiently applied by means of a compressed-air spray-pump holding three or four gallons and costing between six and eight dollars. If a large potato-patch is cultivated, a powder-distributing bellows, costing about one dollar, is useful for distributing Paris green in powder form. A powder-distributer for use in a small garden can be improvised by making a small cheese-cloth bag in which the powder is placed and distributed by shaking the bag over the plants.
Wheel-hoes varying in price from five to fifteen dollars—the price depending on the size and number of attachments—are available for expediting the work in large gardens. Some of these implements have attachments so that they may be used for marking the rows, sowing seeds in drills or hills, for raking, cultivating, and shallow plowing. These, however, are for use on large areas by professional gardeners, or to delight the connoisseur of tools.
To sum up—the tools that it is advisable for a beginner, with a garden of moderate size, to buy are: a spading-fork, an iron rake, a six-inch hoe (of either the scuffle or the ordinary variety), a one-quart atomizer for applying spray fluids, and a watering-can. The cost of these should not exceed three or four dollars.
Start out with a few essential tools and add others if you find that you absolutely need them.
IV
THE SITE—THE SOIL AND ITS PREPARATION
Practically all of the vegetable crops require sunshine, and plenty of it, in order to attain their full development. Therefore, in selecting the location of your vegetable-garden (if it is possible to have any choice) choose one open to sunshine and not hemmed in by tall buildings which shut out the air. A location near big trees should be avoided, for the trees not only shade the crops, but their wide-spreading roots also rob the ground of food and moisture which the vegetables need. The ideal location for a vegetable-garden is one open to the south and sheltered from the north and west winds, but always with this provision—the soil must be of a suitable nature.
This brings us to a consideration of one of the most important factors in successful vegetable culture—that of the soil.
Soils vary a great deal in their physical characters and also in their chemical composition.
Sandy soils quickly dry out and warm up in the spring, and in consequence it is possible to prepare them for planting and produce crops much earlier than is the case with heavier soils. For this reason sandy soils are usually preferred by market gardeners, whose object is to get their crops on the market as soon as possible. One great objection to sandy soils is the rapidity with which they lose their moisture by drainage and evaporation. They are frequently not naturally fertile and it is necessary to apply large quantities of manure to make them profitable. They are also subject to loss of fertility by leaching. The way in which these disadvantages can be corrected will be told later.
At the other end of the scale, almost exactly opposite in every particular, are those soils in which clay predominates. Soils of this type are cold, they dry out very slowly, and as a result it is late before they can be fitted for planting. In dry seasons, because of their water-holding capacity, they are greatly to be preferred, and plants growing on them are less liable to suffer from drought. Clay soils, because of their stickiness, are very difficult to work, and although they may be well supplied with plant food, it is sometimes unavailable because of the sticky, tenacious character of the clay which does not provide a good medium in which the roots may ramify in search of food.
Peat soils and muck lands are made up largely of decayed organic matter. They are usually deficient in minerals, but by correct management can be made to produce good crops of certain kinds of vegetables. Enormous quantities of celery and onions are successfully grown on muck soils.
The kind of soil most desired by the gardener is the happy medium that is called loam. This consists of a mixture of clay and sand in nearly equal proportions, combined with a considerable quantity of decayed organic matter. Such soils are fertile, easy to work, retentive of moisture, but sufficiently porous so that the moisture is not retained in excess. Air can penetrate such soils, a prime necessity for healthy root growth, and also necessary for the existence of bacteria which do so much in making inert plant foods soluble and available for the use of plants.
The extreme types of soil previously mentioned can be greatly improved by judicious treatment. It will be remembered that one of the great drawbacks to sandy soils was the readiness with which they lose their moisture. The proper treatment for this type is to add organic matter. This decays and forms humus, which binds the coarse particles together to a certain extent and increases the absorbtive and retentive properties of the soil. This organic matter is best applied in the form of decayed, or partially decayed, barn-yard or stable manure. If manure is not available a good substitute can be found in leaves. These may be gathered in the fall and piled in a heap to decay. Very little decomposition will take place during the winter months in the Northern states, and for this reason leaves that have been piled in heaps for twelve months or more are to be preferred. Decay may be hastened by forking over the leaves two or three times during the summer. Although decayed leaves are better than fresh ones for mixing in with the soil, fresh leaves are better than none at all.
The owners of city gardens frequently neglect an opportunity of adding humus to their soil when they allow the leaves of street trees to be burned or carted away. The city street-cleaning department is usually only too glad to be relieved of this duty.
When it is impossible to add humus to the soil through the medium of organic manures, as is often the case in city back yards, recourse may be had to one of the many brands of prepared humus obtainable from seedsmen.
Liming is also considered to be good for sandy soils, as the lime exercises a binding influence on the coarse particles. Of course when clay is available it is good to add it, and mix thoroughly with the sand, but it is seldom that clay is present in near enough proximity to make this practice a paying proposition. Compacting sandy soils, by means of a roller on large areas, or by means of the feet in the case of small plots, is good horticultural practice.
Clay soils, like the preceding, are greatly improved by the addition of organic matter. It should be applied in the fall, in the form of strawy stable manure, and buried deeply. Leaves also are a valuable addition. Liming is good, as this causes the flocculation of the clay particles and renders the soil more open and permeable by air and water. The addition of sand, sifted coal ashes, or wood ashes serves the same purpose. Clay soils are benefited by being plowed or spaded in the fall and left rough over the winter. This allows the frost to penetrate more readily, resulting in the breaking up and disintegration of the clods. Another advantage of fall plowing in the case of land of this type is that by so doing it dries out more rapidly in the spring and it is possible to get your crops planted earlier.
Muck and swamp soils are frequently waterlogged, and before they will support a crop it is necessary to underdrain them; but as this is an operation that is scarcely practicable for those for whom this book is written, it will not be dealt with here. As there is always a lack of basic salts in this type of soil, liming is practised, usually to good advantage.
Those who contemplate taking over a piece of land for the purpose of growing vegetables should, if the land has not previously produced a crop, obtain the opinion of a competent gardener as to its possibilities from a gardening standpoint. Such men are usually available in every community, and as a rule are glad to help. If expert opinion is not available, the novice can form an approximate idea of its value by making careful observations in the following manner. Take notice of the vegetation growing on the plot. If it is luxuriant and consists mostly of grasses it will probably be all right for growing vegetables. Dig holes here and there with a spade or trowel and examine the soil. If you find, an inch or two below the surface, nothing but tin cans and broken bottles it is not a safe gardening proposition. Neither should you go ahead if you find only a thin layer of topsoil, two or three inches, above the subsoil. It is usually easy to tell the difference between what is known as topsoil and subsoil. The topsoil is darker in color, due to the presence of humus, and of a finer texture. This topsoil should be at least eight inches deep to get good results. Soils which contain too many large stones should be avoided, also those which consist of only a thin layer overlying a rock ledge.
Most vegetables succeed best in a soil that is slightly alkaline, and land intended for garden use should be tested with litmus paper to discover if acid is present in excess. Take a piece of blue litmus paper and press it upon a handful of moist soil. If it turns red it indicates the presence of acid and the advisability of liming. Lime is a valuable element in the soil, as it assists in making plant foods soluble. It is best applied in the fall, spreading it over the surface and digging or plowing it in. It can also be applied in the spring, but in no case should it be put on so that it comes in direct contact with manure. Lime applied with manure causes ammonia to be liberated too rapidly in the form of gas, which escapes into the air, and thus much of the fertility of the manure is lost. When it is necessary to apply lime in the spring, the manure should first be dug or plowed under, and the lime then spread on the surface, and raked or harrowed in. Use about 20 pounds of air-slaked lime or 30 to 40 pounds of ground limestone to 400 square feet.
Thorough preparation of the soil is essential if best results are to be obtained. This means that the soil must be broken up and pulverized as deeply as possible. There are several reasons for this. Breaking up the soil to a good depth increases the water-holding capacity of the soil—a very important point because of the fact that plants have to take all of the food substances that they obtain from the soil in solution. It provides a greater bulk of soil in which the plant roots may ramify in search of food. The less fertile the soil the greater is the necessity for breaking it deeply to increase the area from which the roots may draw nourishment. Deep tillage encourages the roots to penetrate downward, and plants whose roots go down deeply in the soil are less likely to suffer during dry spells.
It is well to remember, however, that although it is desirable to have the soil broken up deeply it is not a good practice to bring too much of the subsoil up to the surface in digging or plowing. In farming operations a greater depth of soil is obtained by using what is known as a subsoil plow. This implement frequently is used after the field has been plowed in the usual way and penetrates below the topsoil and breaks up the subsoil, but without disturbing their relative positions. In gardens the same result is obtained by what is called bastard trenching, of which more will be said later.
In preparing a piece of ground that has not previously been cultivated the first thing to do is to remove all large stones and rubbish that may be on the surface. If it is a large area, the work of breaking it will, of course, be done with a plow. Supposing the land is covered with a growth of sod, it is a good plan to go over it several times with a disk harrow before plowing. This will cut up the sods, cause them to decay more rapidly when they are turned under, and insure the soil being pulverized throughout its whole depth. After plowing, harrowing is necessary to break the lumps and to compact the soil somewhat. The fining process can then be completed by hand, using a rake for the purpose.
Small areas can be prepared for planting by digging with a spade or spading-fork. A trench should first be dug a foot or eighteen inches wide and a foot deep, provided that the topsoil extends that far. The soil from this trench should be placed on one side so as to be available for filling in the last trench when digging is finished. Having opened the first trench, proceed with the digging, turning each spadeful of soil bottom up in the trench. The soil can be turned over with greater ease and more efficiently by always maintaining a trench when digging. It is the only way by which sods, manure, and weeds may be properly buried so that they may decay and form plant food.
Bastard trenching is carried out in the same way as digging except that the trench is made at least two feet wide and the subsoil thus exposed is broken up with a spading-fork before the topsoil from the next trench is turned over upon it.
When digging, the soil should be broken up as finely as possible with the spade or fork, so as to leave no lumps, and all large stones should be thrown out.
Digging or plowing should never be attempted when the ground is frozen or when it is so wet that the soil sticks to the tools used.
After the soil has been turned over and broken up the rake should come into operation and the surface fined so as to fit it for seed-sowing.
V
FERTILIZERS
The most important elements that it is necessary to apply to the soil in the form of fertilizer are nitrogen, phosphorus, and potash.
Nitrogen greatly stimulates the production of leaves, and an excess of it applied to crops grown for their fruit or roots is undesirable. It is contained in all the animal manures, associated with other fertilizing elements, and in a practically pure state in nitrate of soda.
Phosphorus is a valuable and necessary fertilizer which has a great influence on the production of fruits and seeds. It is found in greater or less quantities in animal manures, and in bone meal. Phosphatic rock that has been treated with acid is another important source of phosphorus.
Potash. The rÔle of potash in the soil is similar to that of phosphoric acid. It is considered to be a valuable fertilizer for all crops that are grown for their roots. It occurs in animal manures and in wood ashes. Muriate of potash and kainite contain potash in a more concentrated form, but are difficult to obtain at present.
All of these three elements must be present in the soil for the production of healthy crops.
It is generally conceded that the best all-round fertilizer for plants is decayed barn-yard or stable manure. It not only adds fertility to the soil, but by its decay it helps to make the mineral particles soluble and thus available as plant foods. As already indicated, it also improves the physical condition of the soil, making sandy soils more retentive of moisture, and rendering clay soils more porous. When applied in the spring it should be decayed or partly decayed, as in this condition it is immediately available for the use of the crop. If it is put on the ground in the fall, fresh manure may be used and plowed under. By the time that the planting season arrives it will be sufficiently decayed. If there is no objection on the score of appearances, stable manure, either fresh or decayed, may be applied in the form of a thin mulch (a layer on the surface of the ground) at any time when the plants are growing. The fertility is gradually washed down into the soil by rain, and a loose covering of this kind is of additional advantage in that it helps to prevent the loss of water from the soil by evaporation. This mulch must not be worked into the soil so that it comes in contact with the plant roots, but should be left on the surface until it is dug under the following fall or spring. Discretion must be exercised in its use. Root crops, that are already growing luxuriantly, such as beets or carrots, or crops that are grown for their fruit, such as beans and tomatoes, would probably be harmed by a surface dressing of this kind. Barn-yard manure is rich in nitrogen, which is a great stimulant of leaf growth. If it is applied too freely to the crops just mentioned it is likely to result in an excessive crop of leaves at the expense of roots or fruit.
A dressing of stable manure two or three inches thick all over the plot or at the rate of from three to five hundred pounds to a plot twenty by twenty feet is about the right quantity to use when the ground is dug or plowed.
Sheep manure is perhaps the next in importance of the organic manures and is more concentrated than barn-yard or stable manure. It can be applied at the rate of forty pounds to four hundred square feet. It is better to spread it over the surface immediately after the ground has been broken up, and thoroughly mix it with the surface soil by means of a rake or harrow.
Hen manure is still more concentrated and should be used in the same way, or as a top-dressing after the crops have started their growth. Twenty pounds to four hundred square feet is a suitable amount to apply. To facilitate its distribution it should be mixed with dry earth and kept in a dry place for a few weeks before it is desired to apply it.
Of the so-called chemical fertilizers, those that are sold by seedsmen as “complete” fertilizers are the best for the amateur to buy. These at the present time are usually made up in the proportion of 5 per cent. nitrogen, 8 per cent. phosphorus, and 1 per cent. potash. Use twelve pounds to four hundred square feet.
All of the preceding are “complete” fertilizers containing nitrogen, phosphorus, and potash in varying proportions. If they are used in combination the quantities must be reduced.
Bone meal is a fertilizer which contains phosphorus and nitrogen. In some of its forms it is rather slow acting and sometimes does not become fully available for the use of the crop until the year succeeding its application. Use twelve pounds to four hundred square feet.
Nitrate of soda is the quickest-acting fertilizer that we have and is very valuable for stimulating the growth of plants early in the spring, when the nitrogen content of the soil is usually low. It is especially suitable for those crops that are grown for their leaves, such as spinach, lettuce, and cabbage. Great care must be exercised in the use of this fertilizer, as an overdose will injure or kill the plants. As it is very soluble, it should not be applied until the plants are up and ready to use it, otherwise much of it will be washed out of the soil and wasted. It should be sprinkled on the surface of the soil, first crushing the lumps, and then mixed in with a hoe or cultivator. An ounce to each square yard, applied at intervals of about three weeks, until the crops have a good start, is the right proportion to use. It is impossible to lay too much emphasis on the necessity for care in the use of this fertilizer. It must not be allowed to come in contact with the leaves of the crop, or it will cause them to burn and turn brown. Generally speaking, it is not a good fertilizer to use on root or fruit crops, although it can be used to good advantage in helping young plants of tomato, cucumber, muskmelon, etc., to get a start just after they have been planted out. Its use later in the season is likely to result in the production of leaves at the expense of fruit.
Wood ashes contain potash and lime. This fertilizer is a valuable dressing for heavy, clayey soils, as it improves their physical condition. It is good for root crops, such as beets, carrots, radishes, etc. Use twenty pounds to four hundred square feet.
It is best to apply all concentrated fertilizers as surface dressings, and then harrow or rake them into the soil, rather than to plow or dig them under.
If it so happens that the soil is not very fertile and there is only a limited quantity of fertilizer available, it is a good plan, instead of spreading it all over the plot, to apply it only in close proximity to the hills or drills in which the plants are growing.
It is important to remember that the greatest good can only be obtained from chemical fertilizers when the soil is plentifully supplied with humus.
VI
THE KINDS OF VEGETABLES TO GROW
A number of factors have to be taken into consideration before deciding just which kinds of vegetables to plant in your garden. Some of these factors are: the nature of the soil, the size of the garden, the food value of the crop and the ease with which it may be stored for winter use.
Sometimes it is possible to adapt the soil to the crop, but usually it is easier to adapt the crop to the soil. A rich loam will support practically all of the vegetables and produce good crops. A thin, sandy soil which has not been properly fertilized is only suitable for such crops as bush beans, beets, Swiss chard, tomato, and New Zealand spinach. Of course other crops can be grown on such a soil, but not very satisfactorily. Potatoes like a sandy soil, but it must be well fertilized.
Heavy clay soils will grow cabbage, kale, corn, parsley, parsnips (if the soil is deep), peas and rhubarb.
If the soil is shallow it is not advisable to attempt any of the root crops that make a long root. In this category belong the long beets, parsnips, and salsify.
That person is unwise who attempts to grow potatoes, corn, and cabbage in a very restricted area. These crops need plenty of room in which to develop, and when one has only a city back yard, or a small plot, it is better to concentrate on the smaller-growing vegetables. The best crops to grow in the city back yard are bush beans, parsley, radish, beets, Swiss chard, and tomato. Peas would probably succeed if it were not for the sparrows which pick off the leaves as fast as they are produced.
One is strictly limited if the available ground is shaded. All the vegetables need sun for the greater part of the day. Those kinds which are grown for their leaves are more satisfactory in a shady garden, and if the soil conditions are favorable the following may be tried: beet, cabbage, lettuce, and Swiss chard. Even these need a few hours of sunshine.
Those who are interested in dietetics may wish to choose their vegetables on the basis of their food value. In terms of the calorie, the unit of energy as applied to food, we find that 1 ounce of dried beans (seeds) and 8 ounces of string-beans are required to produce a hundred calories. Of green corn 3.2 ounces are needed; of potatoes, 5.3 ounces; of onions, 8 ounces; of beets, 9.6 ounces; of cabbage, 13.3 ounces; and at the bottom of the list comes celery, of which 23.7 ounces are required to produce a hundred calories. It is misleading, however, to take a list of vegetables with their caloric values and decide, that because 6.4 ounces of peas contain one hundred calories, while it is necessary to have 10.1 ounces of carrots to produce the same amount, nothing but peas shall be grown in the garden. The proper basis on which to make a decision along these lines is on the amount of calories that can be obtained from each square yard of ground. A considerable area is necessary for the production of a pound of peas, while a similar weight of carrots could be produced in a much smaller space. Furthermore, it must be remembered that the human system demands a certain amount of bulky foods, and these are supplied by vegetables low in caloric values.
There are a number of crops that can easily be preserved or stored for winter use, and this should be considered when deciding what kinds of vegetables to grow. String-beans are easily preserved by pickling them in brine, and there is no difficulty whatever in caring for the dry-shell beans when they are not infested with weevils. All of the root crops—carrots, beets, parsnips—can be easily stored in sand or soil in the cellar, and potatoes are one of the easiest of crops to care for. Onions can readily be carried over into the winter if a cool, airy room is available. All of the crops just mentioned are fairly high in food value.