CULTIVATION OF THE COFFEE PLANT Page 3

In preparing the soil for the new plantation under the intensive cultivation method, the surface of the land is lightly plowed, and then followed up with thorough cultivation. When transplanting time comes, which is when the plant is about a year old, and stands from twelve to eighteen inches high with its first pairs of primary branches, the plants are set out in shallow holes at regular intervals of from eight to twelve, or even fourteen, feet apart. This gives room for the root system to develop, provides space for sunlight to reach each tree, and makes for convenience in cultivating and harvesting. Liberica and robusta type trees require more room than arabica. When set twelve feet apart, which is the general practise, with the same distance maintained between rows, there are approximately four hundred and fifty trees to the acre. In the triangle, or hexagon, system the trees are planted in the form of an equilateral triangle, each tree being the same distance (usually eight or nine feet) from its six nearest neighbors. This system permits of 600 to 800 trees per acre.

Shade and Wind Breaks. Strong, chilly winds and intensely hot sunlight are foes of coffee trees, especially of the arabica variety. Accordingly, in most countries it is customary to protect the plantation with wind-breaks consisting of rugged trees, and to shade the coffee by growing trees of other kinds between the rows. The shade trees serve also to check soil erosion; and in the case of the leguminous kinds, to furnish nutriment to the soil. Coffee does best in shade such as is afforded by the silk oak (Grevillea robusta). In Shade in Coffee Culture (Bulletin 25, 1901, division of botany, United States Department of Agriculture), O.F. Cook goes extensively into this subject.

The methods employed in the care of a coffee plantation do not differ materially from those followed by advanced orchardists in the colder fruit-belts of the world. After the young plants have gained their start, they are cultivated frequently, principally to keep out the weeds, to destroy pests, and to aerate the earth. The implements used range from crude hand-plows to horse-drawn cultivators.

Fertilizing. Comparatively little fertilizing is done on plantations established on virgin soil until the trees begin to bear, which occurs when they are about three years of age. Because the coffee tree takes potash, nitrogen, and phosphoric acid from the soil, the scheme of fertilizing is to restore these elements. The materials used to replace the soil-constituents consist of stable manure, leguminous plants, coffee-tree prunings, leaves, certain weeds, oil cake, bone and fish meal, guano, wood ashes, coffee pulp and parchment, and such chemical fertilizers as superphosphate of lime, basic slag, sulphate of ammonia, nitrate of lime, sulphate of potash, nitrate of potash, and similar materials.

The relative values of these fertilizers depend largely upon local climate and soil conditions, the supply, the cost, and other like factors. The chemical fertilizers are coming into increasing use in the larger and more economically advanced producing countries. Brazil, particularly, is showing in late years a tendency toward their adoption to make up for the dwindling supply of the so-called natural manures. As the coffee tree grows older, it requires a larger supply of fertilizer.

The Famous Boekit Gompong Estate, Near Padang, on Sumatra's West Coast
Showing the healthy, regular appearance of well-cultivated coffee bushes, twenty-six years old. Also note the line of feathery bamboo wind-breaks

Pruning. On the larger plantations, pruning is an important part of the cultivation processes. If left to their own devices, coffee trees sometimes grow as high as forty feet, the strength being absorbed by the wood, with a consequent scanty production of fruit. To prevent this undesirable result, and to facilitate picking, the trees on the more modern plantations are pruned down to heights ranging from six to twelve feet. Except for pruning the roots when transplanting, the tree is permitted to grow until after producing its first full crop before any cutting takes place. Then, the branches are severely cut back; and thereafter, pruning is carried on annually. Topping and pruning begin between the first and the second years.

Coffee Estate in Antioquia, Colombia, Showing Wind-Breaks

Coffee trees as a rule produce full crops from the sixth to the fifteenth year, although some trees have given a paying crop until twenty or thirty years old. Ordinarily the trees bear from one-half pound to eight pounds of coffee annually, although there are accounts of twelve pounds being obtained per tree. Production is mostly governed by the cultivation given the tree, and by climate, soil, and location. When too old to bear profitable yields, the trees on commercial plantations are cut down to the level of the ground; and are renewed by permitting only the strongest sprout springing out of the stump to mature.

Catch Crops. On some plantations it has become the practise to grow catch crops between the rows of coffee trees, both as a means of obtaining additional revenue and to shade the young coffee plants. Corn, beans, cotton, peanuts, and similar plants are most generally used.

Pests and Diseases. The coffee tree, its wood, foliage, and fruit, have their enemies, chief among which are insects, fungi, rodents (the "coffee rat"), birds, squirrels, and—according to Rossignon—elephants, buffalo, and native cattle, which have a special liking for the tender leaves of the coffee plant. Insects and fungi are the most bothersome pests on most plantations. Among the insects, the several varieties of borers are the principal foes, boring into the wood of the trunk and branches to lay larvae which sap the life from the tree. There are scale insects whose excretion forms a black mold on the leaves and affects the nutrition by cutting off the sunlight. Numerous kinds of beetles, caterpillars, grasshoppers, and crickets attack the coffee-tree leaves, the so-called "leaf-miner" being especially troublesome. The Mediterranean fruit fly deposits larvae which destroy or lessen the worth of the coffee berry by tunneling within and eating the contents of the parchment. The coffee-berry beetle and its grub also live within the coffee berry.

Among the most destructive fungoid diseases is the so-called Ceylon leaf disease, which is caused by the Hemileia vastatrix, a fungus related to the wheat rust. It was this disease which ruined the coffee industry in Ceylon, where it first appeared in 1869. and since has been found in other coffee-producing regions of Asia and Africa. America has a similar disease, caused by the Sphaerostilbe flavida, that is equally destructive if not vigilantly guarded against. The coffee-tree roots also are subject to attack. There is the root disease, prevalent in all countries, and for which no cause has yet been definitely assigned, although it has been determined that it is of a fungoid nature. Brazil, and some other American coffee-producing countries, have a serious disease caused by the eelworm, and for that reason called the eelworm disease.

Coffee planters combat pests and diseases principally with sprays, as in other lines of advanced arboriculture. It is a constant battle, especially on the large commercial plantations, and constitutes a large item on the expense sheet.

Cultivation by Countries

Coffee-cultivation methods vary somewhat in detail in the different producing countries. The foregoing description covers the underlying principles in practise throughout the world; while the following is intended to show the local variations in vogue in the principal countries of production, together with brief descriptions of the main producing districts, the altitudes, character of soil, climate, and other factors that are peculiar to each country. In general, they are considered in the order of their relative importance as producing countries.

Brazil. In Brazil, the Giant of South America, and the world's largest coffee producer, the methods of cultivation naturally have reached a high point of development, although the soil and the climate were not at first regarded as favorable. The year 1723 is generally accepted as the date of the introduction of the coffee plant into Brazil from French Guiana. Coffee planting was slow in developing, however, until 1732, when the governor of the states of Pará and Maranhao urged its cultivation. Sixteen years later, there were 17,000 trees in Pará. From that year on, slow but steady progress was made; and by 1770, an export trade had been begun from the port of Pará to countries in Europe.

Up-to-Date Weeding and Harrowing, São Paulo

The spread of the industry began about this time. The coffee tree was introduced into the state of Rio de Janeiro in 1770. From there its cultivation was gradually extended into the states of São Paulo, Minãs Geraes, Bahia, and Espirito Santo, which have become the great coffee-producing sections of Brazil. The cultivation of the plant did not become especially noteworthy until the third decade of the nineteenth century. Large crops were gathered in the season of 1842–43; and by the middle of the century, the plantations were producing annually more than 2,000,000 bags.

General View of Fazenda Dumont, Ribeirao Preto, São Paulo, Brazil
Photograph by Courtesy of J. Aron & Co.