—In Riverside grapes cannot be grown without irrigation on the mesa lands, with the exception of one or two localities in the arroyo. In the Ontario district, raisin grapes may be grown without irrigation in the center of the valley, but on the mesas, higher on the sides, they must be irrigated, and even in localities where they could be grown without artificial irrigation the same is always practiced whenever it can be obtained. Less water is, however, needed than in the San Joaquin valley, but more than would suffice in El Cajon. Through the nature of the gravelly subsoil, the raisin land cannot fill up with water. Seepage is only possible to a limited degree; summer irrigation is always required. The vines are irrigated three times a year, in April, June and August. The system of furrows is used, and a ten-inch flow is considered enough to irrigate one acre of grapes during one day and night each time. In Ontario the raisin grapes are irrigated every five weeks, not, however, while they are in bloom, as it is considered best to wait until the berries are well set. In Redlands, one irrigation after the winter rain ceases is considered enough, even on soil with thirty feet to water.
Soils.
—The soil in San Bernardino county varies considerably. In Riverside and Redlands the best soil is a reddish loam, with some sand and gravel. But in Riverside we also find sandy soil of lighter color and strength, which, however, is less suited to grapes. In Ontario the soil varies from a heavy clayey adobe to a lighter but very rich sandy loam of a grayish color. The very sandy soil in some river bottoms, especially around Lugonia, has, through experience, been found to be entirely unsuited to the raisin grapes.
The Vineyards.
—The variety used for raisins is nearly entirely the Muscat of Alexandria, although several vineyardists call these grapes incorrectly the Gordo Blanco. I saw nowhere this variety, but I suppose some must have been imported there. In planting, cuttings have been preferred, probably because they are the cheapest, and because the value of rooted vines has not been properly understood. The vines are set, almost everywhere, eight by eight, only in a few vineyards nine by nine feet. There is, however, a growing belief that eight by ten feet or eight by twelve feet is better than the old accepted eight by eight feet. But I believe that this tendency to give the vines greater room will, in course of time, be followed by the opposite tendency to plant them closer, at least one way, and give more room the other way. The Muscat of Alexandria begins to bear in three years, and in four years will pay fifty dollars per acre. The practice of plowing is, in Riverside, to first plow towards the vines in the fall, and then, when the vegetation has begun in the spring, the soil is turned back towards the center of the space between the rows, or from the vines. Then the soil is cultivated with chisel-tooth cultivators, both crosswise and lengthwise, also similarly after every irrigation. But this practice is not entirely the same everywhere, and the different vineyardists have here as elsewhere different ideas, even in regard to the most common farm or vineyard practices. Pruning was formerly done much closer than now, but it was found that by close pruning the vines bore less. To-day from fifteen to twenty spurs are left on the strongest vines, and on every spur about two eyes. From twenty to twenty-five spurs were found to be too much; with such quantity of spurs the vines produce smaller and inferior grapes. Some vines which were pruned with twenty-five spurs last year have this year been given nine or ten spurs only, so as to enable them again to recover and grow strong, when the quantity of spurs will again be increased to fifteen. Summer pruning is used by some, but not by others. It does not, according to observation, injure the vine, but produces always a second crop, which is difficult to cure. Sulphuring the vines is practiced by some, but not by all, growers. A great many cannot see the use and value of sulphur. No one sulphurs for colure or the dropping of the grape, which is quite a common occurrence. The vines, however, never suffered from the leaf-hopper nor the grape caterpillars, but sunscald is not uncommon, nor is black-knot.
The Crop.
—The Muscat grapes begin to ripen in Riverside later than in the San Joaquin valley, and picking commences between the 10th and the 30th of September. Highlands is said to be two weeks later than Riverside. The first crop is ready to turn in two weeks, and is ready for the sweatbox in three weeks’ time. For drying, trays are used, and about twenty pounds are placed on each tray. These trays are all made of pine or fir. Redwood has been found unsuitable, as imparting both a color and a taste to the raisins if accidentally wet by early showers in the fall. Size of trays, two by three feet, with a cleat nailed at the short ends, but none at the long ends of the trays. Sweatboxes receive the raisins when they leave the trays. Formerly the sweatboxes were much larger and deeper than now, eight or even twelve inches in depth not being unknown. Of late sweatboxes are made two by three feet, or of the exact size of the trays, and not over six inches in depth. A greater depth makes the boxes too heavy to handle, and also causes the bunches to break. The packing of the raisins in Riverside and in the Southern California raisin districts generally is done by the method known as “top up.” That is, the first raisins are placed in the bottom of the box and successive layers are placed on top, until finally the top layer is put on the last. The lever press for the compression of the layers is a Riverside invention. A modification of this press is now in use in nearly all districts where the “top-up” method of packing is practiced. The brands packed are as follows: Three Crown London Layers, Two Crown London Layers, Three Crown Loose Muscatels, Two Crown Loose Muscatels, and Muscatels in sixty-pound sacks; also Seedless Muscatels in sacks of sixty and thirty pounds respectively. Cotton sacks are commonly used for the two latter brands. The brands are apt to vary from year to year, according to the fancy or ideas of the packers, new ones of which are in the field every year. Only those who both produce and pack have anything like established brands. The prices paid for raisins in sweatboxes have varied in different years. In 1887 and 1888, the price was from four and one-half to five cents per pound. In 1889, the price rose to five and five and three-fourths cents, and in one or two instances six cents were paid.
The Profits and Other Items.
—The profit varies, of course, greatly, but an average profit may be considered to be from about $125 to $150 per acre. The yield of an acre is variable, but from eight to ten tons of fresh grapes is said not to have been uncommon. In some cases the yield has been much higher and the profit larger. I have from trustworthy source the statement that one vineyardist who owns only a few acres, I believe only five, and who has given all his time and attention to these vines, has realized as much as $430 per acre. This I quote only as an instance of what might be done with care and expense in an exceptionally favored locality. Some few growers have realized $250 profit on each of a few acres, which also is to be considered exceptional. I believe my former statement of $150 per acre as being reliable and attainable by all San Bernardino county raisin-growers who have good land, and who give their vines sufficient care. As another instance of a high yield, I copy below an account of the vintage of C. Newton Ross of Etiwanda, San Bernardino county, California. The article appeared in the Press and Horticulturist of Riverside, September 27th, and I have every reason to consider it trustworthy. The writer adds that the yield is extraordinary. “Mr. Ross has seventeen acres of 8,000 vines five years old from which he picked 8,648 trays of grapes that average twenty-five pounds to the tray, or a total of 108 tons of grapes, which will make thirty-six tons of raisins,—equal to 3,600 boxes,—over 200 boxes to the acre. This is the first picking only, and it is estimated that the second crop will be half as large as the first, which will give a total yield of 318 boxes to the acre. Mr. Ross has sold his first crop at five and one-half cents per pound in the sweatbox, which will give him an income of $242 an acre on the first crop, and half as much more on the second crop if he succeeds in saving it in good shape, or a total income of $363 per acre on his crop. Mr. Ross estimates that $50 an acre will cover the entire cost of taking care of the vineyard and putting the crop in the sweatbox, and this would leave him a net income of $313 an acre for his vineyard, which is ten per cent on $3,130 per acre.” But, I may add, it is not likely that such a profit can be realized year after year.
As regards care of the vineyard and expenses of running the same, they vary, of course, and are estimated at from twenty dollars upwards. But the best vineyardists spend from thirty to forty dollars per acre in the care of an acre, but in this do not include interest, trays bought, etc., nothing in fact but “care.”