Manual of American grape-growing

by U. P. Hedrick

The number of vines to the acre must be determined before growing or buying plants. This is done by multiplying the distance in feet between the rows by the distance the plants are apart in the row, and dividing 43,560, the number of square feet in an acre, by the product.

Preparation for Planting

It is impossible to put too much emphasis on the necessity of thorough preparation of the land before planting the grape. Extra expenditure to secure good tilth is amply repaid by increased growth in the grape, and all subsequent care may fail to start the vines in vigorous growth if the land is not in good tilth preparatory to planting. The vineyard is to stand a generation or more, and its soil is virtually immortal, two facts to suggest perfect preparation. The land should be thoroughly well plowed, harrowed, mixed and smoothed. The better this work is done, the greater the potentialities of the vineyard. Here, indeed, is a time to be mindful of the adage which comes from Cato, a sturdy old Roman grape-grower of 2000 years ago: "The face of the master is good for the land."

Preparation is a series of operations in which it is wise to take advantage of time and begin a year before the vines are to be set. The land must be put in training to fit it for the long service it is to render. The two great essentials of preparation are provision for drainage and thorough cultivation. Both, to be performed as the well-being of the grape require, take time, and a year is none too short a period in which to do the work. Moreover, newly drained and deeply plowed land requires time for frost, air, sunshine and rain to sweeten and enliven the soil after the mixture by these operations of live topsoil with inert subsoil.

Drainage.

The ideal soil, as we are often told, resembles a sponge, and is capable of retaining the greatest possible amount of plant-food dissolved in water, and at the same time is permeable for air. This ideal, sponge-like condition is particularly desirable for the grape, especially native species, because the vines of all are exceedingly deep-rooted. Moreover, grapes thrive best in a warm soil. While, therefore, the roots may make good use of nutritious solutions, if not too diluted, in an undrained soil, they suffocate and do not receive sufficient bottom heat. It must be made emphatic that the grape will not thrive in water-logged land.

Unless the land is naturally well drained, under-drainage must be provided as the first step in the preparation of land for the vineyard. Tile-draining is usually best done by those who make land-draining their business, but information as to every requirement of land and detail of work may be secured from many texts, so that grape-growers may perform the work for themselves. In concluding the topic, the reader must be reminded that high and hill lands are not necessarily well drained, and low lands are not necessarily wet even if the surface is level. Often hilltops and hillsides need artificial draining; much less often valley lands and level lands may not need it. To assume, too, that gravelly and shaley soils are always well drained often leads directly contrary to the truth. Sandy and gravelly soils need drainage nearly as often as loamy and clayey ones.

Following tiling, if the land has had to be under-drained, the vineyard should be graded to fill depressions and to make the surface uniform. Usually this can be done with cutaway, tooth or some other harrow, but sometimes the grader or road-scraper must be put in use.

Fitting the land.

Preparatory cultivation should begin the spring preceding planting by deep plowing. If the land has been used long for general farming so that a hard plow-sole has been formed by years of shallow plowing, a subsoil-plow should follow in the furrow of the surface plow, although it is seldom advisable to go deeply into the true hardpan. Fitting the land must not stop here but should continue through the summer with harrow and cultivator to pulverize the soil almost to its ultimate particles. Such cultivation can be sufficiently thorough, and be made at the same time profitable, by growing some hoed crop which requires intensive culture. If the soil lacks humus, a cover-crop of clover or other legume might well be sown in early summer to be plowed under in late fall. Or, if stable manure is available, this generally should be applied the fall before planting. Stable manure applied at this time to a soil inclined to be niggardly puts an atmosphere in the forthcoming vineyard wholly denied the grower who must rely on commercial fertilizers.