HARVESTING AND MARKETING THE NATIVE NUT CROPS OF THE NORTH

By C. A. Reed, Associate Pomologist, U. S. Department of Agriculture

The native nut crops in the northern portion of the country, east of the Rocky Mountains, offer a possible source of considerable income, if gathered while in prime condition and properly prepared for market. Thousands of bushels of highly edible nuts annually go to waste in that portion of the country covered by the great Mississippi Valley, the Appalachian region and the Middle Atlantic seaboard. These are chiefly black walnuts, hickory nuts, and butternuts, although it is probable that several hundred tons of beechnuts which annually go ungathered should be included. These last are too small for human consumption in this country, under the existing relations between human labor and the quality of available food. Nevertheless, there are ways by which they can be put to profitable use.

The kernels of black walnuts and butternuts are in great demand. The potential supply of the former is usually abundant but the small number of butternut trees in the country automatically makes the possible supply of nuts of that kind very limited. The kernels of both these, walnuts and butternuts, and also of the best northern hickories, particularly the shagbarks and shellbarks, are highly palatable and nutritious. In these respects they compare favorably with any other kinds of nuts on the market. These northern species are singularly free from an impregnation of tannin in the pellicles which leaves a bitter after taste so familiar with certain of their chief competitors in the nut market.

Black walnut kernels in particular appear to be firmly entrenched in the markets of this country. They are in keen demand with many classes of manufacturers. This demand is on the increase with no apparent possibility of foreign competition, as the eastern black walnut, Juglans nigra, the finest of the American blacks, is grown nowhere outside of the United States except in certain districts of a narrow adjoining fringe of neighboring Canada.

The present year may be one of the best likely to occur soon in which to harvest and prepare these nuts for the market or home consumption on the farm. The drought has undoubtedly reduced the crop as a whole, although at this writing the yield appears considerably greater than that of 1929. At harvest time it will probably be found that many of the nuts are below normal size and that the kernels are imperfectly developed. The quantity of the finished product which it would be possible to place on the market would therefore appear likely to be small.

On its face, with a light crop of poor grade in prospect, it may be difficult to understand why this should be a propitious year to inaugurate a systematic harvesting and marketing campaign. However, in explanation of this, first, there are no carry-overs from last year. So short was the crop of 1929 that manufacturers found the supply exhausted before the end of last January. Many sent out urgent appeals hoping to find some source of supply. They offered the inviting price of 65 cents a pound for good grade kernels, f. o. b. the farmers' shipping point. Yet it was all in vain as the kernels were not forthcoming.

Second, as a result of the recent extreme drought and the consequent shortage of some of the more staple crops, there will likely be considerable slack time on many farms. Where this is the case and there are nut crops in the field it will likely be found in many cases that they may be gathered and sold to good financial advantage, assuming that right methods are employed in harvesting and preparing for market.

Third, where there are nuts in quantity too limited to justify gathering and preparing for market, they should still be gathered and as carefully prepared as though for the market and used on the home table. They will be found to be most excellent and pleasing food.

To obtain the highest prices for black walnuts or butternuts, certain fundamentals should be kept in mind.

1. They should be sold only in the shelled condition.

2. The kernels must be delivered early.

3. They should present an attractive appearance.

4. They should be in thoroughly sanitary condition.

The explanation as to why they should be sold in the shelled condition is simple. The weight of shell is too great to justify shipment in that condition. In the shell, walnuts and butternuts seldom bring more than $1.50 or $2.00 per bushel and the demand is exceedingly limited, especially after the earliest part of the season. Again, the shells are of no value except for fuel. Fuel of this kind by freight or express is exceedingly costly. Again, the nuts must be cracked somewhere and the kernels removed before they can be used, and farm labor is much cheaper than that of the city. Regardless of where the labor is from, the cost of cracking the nuts and picking out the kernels, or "shelling" as the operation is called in the trade, is charged back to the farmer. The shelling of these nuts is something in which the whole family on the farm can join.

Delivery should be early as it is then that prices are best. The use of shelled nuts is practically an all-year affair, yet, just as soon as the supply begins to bulk up in the hands of the wholesalers, prices promptly go lower.

The condition in which black walnut kernels reach the market is ordinarily very poor. Little attention appears to be paid to the matter of sanitation, and practically no thought is given to their appearance. As a rule, shipment is made in burlap bags of double thickness. Little thought is ever paid to separating the kernels according to shade of color and it is rare that the kernels are properly cured after being removed from the shells. Oil and moisture given off by the kernels are taken up by the burlap bags, and by the time delivery is made to the wholesaler, the kernels are in no sense attractive and are often unsanitary. Fortunately, the kernels are carefully gone over by employees of the wholesaler by whom all spoiled pieces are removed and, in the process of manufacture, the kernels are usually so heated as to dispel any danger from ill effects due to the unsanitary condition.

The successive steps essential to harvesting and preparing for market may be grouped as follows:

1. Harvest the nuts as soon as mature.

2. Remove the hulls promptly.

3. Cure the nuts somewhat.

4. Crack the shells and remove the kernels very soon.

5. In cracking, the kernels should be separated into five grades—Lights, darks, intermediates as to color, small pieces and crumbs.

6. Before packing for shipment the kernels must be artificially cured until they no longer feel moist to the hand when it is run through the container.

7. Barrels or boxes of wood, or strawboard lined with water-proof paper, should be used in packing for shipment. These should not be closed until immediately before shipment.

8. As soon as received by the buyer the containers should be opened and the kernels spread out in clean bins where they may receive frequent inspection.

Harvesting

The nuts should be picked from the ground within three or four days from the time they fall. If possible the limbs should be jarred so as to shake the nuts from the tree. Good nuts will usually be found to mature within a very few days and may readily be shaken down.

At this time the hulls will be perfectly sound and not objectionable, in so far as staining the hands is concerned. But if the hulls be broken open the juice which they emit will leave a lasting stain on the hands or garments. But the hulls need not be broken to any great extent.

Hulling

The ordinary corn sheller on the farm is undoubtedly the most practicable instrument for removing the hulls, generally available at this time. If the hulls are still green enough to be firm, the nuts may be placed in the machine by hand. Otherwise, some arrangement may be worked out by which the nuts may automatically be fed into the machine. After hulling by this method the nuts should be put into a tub or tank of water and thoroughly washed with a broom or stiff brush. When the nuts are hulled promptly and well washed it will be discovered that the natural color of walnuts is light or whitish and not black. The dark color is wholly due to stain from the green hulls. This stain, by the way, loses its effectiveness as soon as the hulls turn dark. Stains from nut hulls which have lost all trace of green color, so that the hulls are black, are readily washed from the hands.

After the nuts have come from the sheller they may be handled by shovels or by forks with tines close together. They should then be cured for a few days. For this purpose they should never be placed in piles or deep layers. Preferably they should be spread out in trays with bottoms of wire mesh or narrow cleats so as to be open. These should be put where there will be a free circulation of air all about. Where trays are not available the nuts may be spread on a barn floor and the doors left open during the day. If the weather is bright they may be spread on boards laid on the ground directly in the sun, although it is probable that they should be given partial shade during extremely hot days.

Various methods of hulling other than by the corn sheller are in use. Some involve merely stepping on the nuts with a forward movement of the foot, just as the hulls are softening. This is not particularly satisfactory as the nuts must still be picked out of the mashed hulls by hand. Besides leaving a very persistent stain on the hands this method is unsatisfactory for two reasons; it is not at all rapid and very far from perfect in the degree to which it removes the hulls.

Other methods involve the use of automobile wheels. Sometimes machines are driven over the nuts as they are thinly spread on the ground. Again a wheel is jacked up and set in motion in a tub of water in which the nuts have been placed. Both methods have their advocates. The writer has had experience with the former only, yet he can conceive of little to commend either method.

Still another method is that of pounding off the hulls by hand. Of all common methods this has the fewest conceivable advantages. It is slow, thoroughly inefficient, and extremely objectionable from the standpoint of the stain.

What is perhaps far the most satisfactory method of any yet used for removing the hulls, from every standpoint except that of expense, is one evolved by the Department of Agriculture in 1926. It consists merely of running the nuts through large-sized vegetable paring machines. These machines consist of metal containers, circular in form and having a capacity of approximately 1-1/2 bushels. The inner walls are lined with hard abrasive surfaces. A bushel of nuts is placed inside, the lid closed, a stream of water turned into the container, and the machine set in operation. By means of gears attached to the bottom of the container which is separate from the walls, plated and perforated, the bottom spins around several hundred times per minute. The nuts are made to beat violently against the rough walls with the result that, in from 2-1/2 to 5 minutes, depending upon the firmness of the hulls, the nuts are ready to be taken out. They are then perfectly hulled, thoroughly washed and light or whitish in color.

With a few days of drying, the nuts should be ready for cracking.

Cracking

As soon as fit for cracking, and before becoming so dry that the kernels break badly, the nuts should be shelled. The hammer and a solid block of wood, or a piece of metal with a shallow cupped depression in which to place the nuts while held for hitting, is the most common outfit in use. Various handpower machines are appearing on the market, and already designers are at work attempting to devise power machines. The former have been in use for several years. The latter are mostly quite new and untried. About all that can be said regarding such machines is that they are much needed and that it is not improbable that there will soon be several makes of efficient machines in the field.

Grading the Kernels

As soon as the shells have been cracked, the kernels should be extracted. All large pieces, including chiefly quarters and whatever halves there are, should be separated into three shades: lights, darks and intermediates, as previously mentioned. All sound, small pieces, regardless of shade, should be put into a fourth grade and all unsound kernels and particles too small to separate from minute particles of shell, should be put into a fifth grade and fed to poultry in moderate quantity at one time.

Unless given artificial heat before packing for shipment, the kernels are fairly certain to become moldy and even to cake together in a solid mass while in transit. To do this they should be placed in trays or pans and put above or back of a kitchen stove where they will not get hot enough to be injured. The hand should be run through the kernels not infrequently so as to detect any excessive heat and also to determine by experience the proper degree of dryness.

After being kept warm and being frequently stirred until the kernels seem properly dry they may be removed and allowed to become cool. They should then be re-examined with the hand so as to determine the apparent dryness. If they feel at all moist, they should be returned to the drying position and the operation repeated. The writer has had no personal experience in this matter and so cannot give precise directions. However, the farm wife can probably work out a very satisfactory system in her kitchen.

Packing and Shipping

Although previously discussed, the importance of clean, sanitary and attractive containers for shipment can scarcely be overstressed. Without such precaution no one need hope to work up a permanent business, for, regardless of how secure he may feel with the trade he will eventually find his customers turning to others who are willing to go to this trouble.

When the time comes for shipping the boxes may be closed up and delivered promptly to the transporting agency. The containers should again be opened as soon as the destination is reached and an examination made as to the moisture condition of the kernels.

Handling Other Nuts

So far as harvesting and hulling hickory nuts is concerned, the matter is not at all complicated. Good nuts drop with the first sharp frost. Those with good kernels inside become automatically separated from the hulls. Those which do not easily become separated from the hulls should be discarded as they are rarely of any value and should not become mixed with the good nuts. With a moderate amount of curing these nuts should be ready for market. They usually bring better prices in the shell than do walnuts; but on the other hand they are in less demand after being shelled. Perhaps this is because the trade has not been built up but it is a recognized fact that black walnut kernels are practically in a class by themselves among the nuts of the world, in the extent to which they retain an agreeable flavor in cooking. Hickory nut kernels should be given a much greater place than they now occupy in the cooking and baking for the farm table. A few finely chopped kernels mixed with breads, cakes, or cereals will be found highly acceptable to most palates.

Butternuts are generally too scarce to justify much attention. They could probably be hulled by vegetable paring machines quite as efficiently as are walnuts but, so far as known to the writer, this has not been tried.

Beechnuts make excellent food for poultry and certain kinds of livestock. To convert the crop into cash is largely a matter of using the land under the trees for the right sort of grazing. In European countries beechnuts are highly valued as a source of salad oil. Mr. Bixby of this association is taking steps to procure trees bearing as large sized nuts as possible with a view to subsequent breeding. So far as known to the writer beechnuts in this country are not gathered in quantity.