Part 2

It is customary, when writing of any crop culture, to give precedence to site and soil, but in the case of cacao these considerations are of secondary importance, and while none of the minor operations of planting, pruning, cultivation, and fertilizing may be overlooked, they are all outweighed by the single essential--climate.

In general, a state of atmospheric saturation keeps pace with heavy rainfall, and for that reason we may successfully look for the highest relative humidity upon the eastern shores of the Archipelago, where the rainfall is more uniformly distributed over the whole year, than upon the west.

There are places where the conditions are so peculiar as to challenge especial inquiry. We find on the peninsula of Zamboanga a recorded annual mean rainfall of only 888 mm., and yet cacao (unirrigated) exhibits exceptional thrift and vigor. It is true that this rain is so evenly distributed throughout the year that every drop becomes available, yet the total rainfall is insufficient to account for the very evident and abundant atmospheric humidity indicated by the prosperous conditions of the cacao plantations. The explanation of this phenomenon, as made to me by the Rev. Father Algué, of the Observatory of Manila, is to the effect that strong equatorial ocean currents constantly prevail against southern Mindanao, and that their influence extend north nearly to the tenth degree of latitude. These currents, carrying their moisture-laden atmosphere, would naturally affect the whole of this narrow neck of land and influence as well some of the western coast of Mindanao, and probably place it upon the same favored hygrometric plane as the eastern coast, where the rainfall in some localities amounts to 4 meters a year.

While 2,000 mm. of mean annual rainfall equably distributed is ample to achieve complete success, it seems almost impossible to injure cacao by excessive precipitation. It has been known to successfully tide over inundation of the whole stem up to the first branches for a period covering nearly a month.

Irrigation must be resorted to in cases of deficient or unevenly distributed rainfall, and irrigation is always advantageous whenever there is suspension of rain for a period of more than fifteen days.

Concerning temperatures the best is that with an annual mean of 26° to 28°, with 20° as the mean minimum where any measure of success may be expected. A mean temperature of over 30° is prejudicial to cacao growing.

The last but not least important of the atmospheric phenomena for our consideration are the winds. Cacao loves to "steam and swelter in its own atmosphere" and high winds are inimical, and even refreshing breezes are incompatible, with the greatest success. As there are but few large areas in these Islands that are exempt from one or other of our prevailing winds, the remedies that suggest themselves are: The selection of small sheltered valleys where the prevailing winds are directly cut off by intervening hills or mountains; the plantation of only small groves in the open, and their frequent intersection by the plantation of rapid growing trees; and, best of all, plantings made in forest clearings, where the remaining forested lands will furnish the needed protection.

LOCATION.

It is always desirable to select a site that is approximately level or with only enough fall to assure easy drainage. Such sites may be planted symmetrically and are susceptible to the easiest and most economical application of the many operations connected with a plantation.

Provided the region is well forested and therefore protected from sea breezes, the plantation may be carried very near to the coast, provided the elevation is sufficient to assure the grove immunity from incursions of tide water, which, however much diluted, will speedily cause the death of the plants.

Excavations should be made during the dry season to determine that water does not stand within 1 1/2 meters of the surface, a more essential condition, however, when planting is made "at stake" than when nursery reared trees are planted.

Hillsides, when not too precipitous, frequently offer admirable shelter and desirable soils, but their use entails a rather more complicated system of drainage, to carry away storm water without land washing, and for the ready conversion of the same into irrigating ditches during the dry season. Further, every operation involved must be performed by hand labor, and in the selection of such a site the planter must be largely influenced by the quantity and cost of available labor.

The unexceptionable shelter, the humidity that prevails, and the inexhaustible supply of humus that is generally found in deep forest ravines frequently lead to their planting to cacao where the slope is even as great as 45°. Such plantations, if done upon a considerable commercial scale, involve engineering problems and the careful terracing of each tree, and, except for a dearth of more suitable locations, is a practice that has little to commend it to the practical grower.

THE SOIL.

Other things being equal, preference should be given to a not too tenacious, clayey loam. Selection, in fact, may be quite successfully made through the process of exclusion, and by eliminating all soils of a very light and sandy nature, or clays so tenacious that the surface bakes and cracks while still too wet within 3 or 4 inches of the surface to operate with farm tools. These excluded, still leave a very wide range of silt, clay, and loam soils, most of which are suitable to cacao culture.

Where properly protected from the wind a rocky soil, otherwise good, is not objectionable; in fact, such lands have the advantage of promoting good drainage.

PREPARATION OF THE SOIL.

When the plantation is made upon forest lands, it is necessary to cut and burn all underbrush, together with all timber trees other than those designed for shade. If such shade trees are left (and the advisability of leaving them will be discussed in the proper place), only those of the pulse or bean family are to be recommended. It should also be remembered that, owing in part to the close planting of cacao and in part to the fragility of its wood and its great susceptibility to damage resulting from wounds, subsequent removal of large shade trees from the plantation is attended with difficulty and expense, and the planter should leave few shade trees to the hectare. Clearing the land should be done during the dry season, and refuse burned in situ, thereby conserving to the soil the potash salts so essential to the continued well-being of cacao.

The land should be deeply plowed, and, if possible, subsoiled as well, and then, pending the time of planting the orchard, it may be laid down to corn, cotton, beans, or some forage plant. Preference should be given to "hoed crops," as it is essential to keep the surface in open tilth, as well as to destroy all weeds.

The common practice in most cacao-growing countries is to simply dig deep holes where the trees are to stand, and to give a light working to the rest of the surface just sufficient to produce the intermediate crops. This custom is permissible only on slopes too steep for the successful operation of a side hill plow, or where from lack of draft animals all cultivation has to be done by hand.

Cacao roots deeply, and with relatively few superficial feeders, and the deeper the soil is worked the better.

DRAINAGE.

The number and size of the drains will depend upon the amount of rainfall, the contour of the land, and the natural absorbent character of the soil. In no case should the ditches be less than 1 meter wide and 60 cm. deep, and if loose stones are at hand the sloping sides may be laid with them, which will materially protect them from washing by torrential rains.

These main drains should all be completed prior to planting. Connecting laterals may be opened subsequently, as the necessities of further drainage or future irrigation may demand; shallow furrows will generally answer for these laterals, and as their obliteration will practically follow every time cultivation is given, their construction may be of the cheapest and most temporary nature. Owing to the necessity of main drainage canals and the needful interplanting of shade plants between the rows of cacao, nothing is gained by laying off the land for planting in what is called "two ways," and all subsequent working of the orchard will consequently be in one direction.

THE PLANTATION.

Cacao, relatively to the size of the tree, may be planted very closely. We have stated that it rejoices in a close, moisture-laden atmosphere, and this permits of a closer planting than would be admissible with any other orchard crop.

In very rich soil the strong-growing Forastero variety may be planted 3.7 meters apart each way, or 745 trees to the hectare, and on lighter lands this, or the more dwarf-growing forms of Criollo, may be set as close as 3 meters or rather more than 1,000 trees to the hectare.

The rows should be very carefully lined out in one direction and staked where the young plants are to be set, and then (a year before the final planting) between each row of cacao a line of temporary shelter plants are to be planted. These should be planted in quincunx order, i. e., at the intersecting point of two lines drawn between the diagonal corners of the square made by four cacaos set equidistant each way. This temporary shelter is indispensable for the protection of the young plantation from wind and sun.