The Commercial Products of the Vegetable Kingdom / Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c.

by P. L. Simmonds

There are very many plants and substances which have been passed over altogether, it being impossible, within the limits of a moderate sized volume, to bring under notice even a tithe of the valuable grasses, timber trees, cabinet woods, fruits, &c.; and I have confined myself in a great measure to those which either already are, or might easily be rendered, articles of commerce, of some importance. I have shown their present value by quoting the current prices, and brought down, as far as possible, the statistics of each article to the close of last year, thus rendering the work valuable by commercial references which could not be found collectively elsewhere.

There are some articles of commerce which could not properly be treated of in a work intended as a guide on agriculture and husbandry, for the tropical planter and cultivator, who purposes devoting his attention to the raising of useful crops and plants on his estate. The forests and jungles of the tropics abound in products of an useful character, the luxurious and spontaneous growth of nature, such as ebony, sandal wood, &c.; but these must be sought for by a different class of settlers; and the mahogany cutter of Honduras, the teak-feller of India, the gatherer of elastic gums, can scarcely be ranked with the cultivators of the soil.

I had originally intended to confine my remarks to staples of tropical growth, but I have been induced to depart from my prescribed plan by the importance of some of the commercial products of temperate regions, such as maple and beet-root sugar, wheat, the grain crops, and potatoes.

The system of agriculture, and modes of tillage, &c., of separate countries in the Eastern and Western hemisphere, notwithstanding their similarity of climate, are as opposite as if each country belonged to a different zone; and yet much may be learned by one of the other.

The only essentially useful division of seasons in countries within the tropics is into a wet and dry season, the former being the period of germination, the latter that of fructification.

The implements of agriculture required are for the most part few and simple, for no high tillage is necessary, the luxuriance of vegetation being so great that most of the products of the soil will grow indiscriminately throughout the year, and the only care of the husbandman, after the first preparation of the soil, is to keep down the vast growth of weeds, which might stifle the crops.

In tropical regions there is less demand for manures than in temperate climates, but still there are many additions to the soil that may profitably be made.

Firstly, that most important principle, which has only recently been practically inculcated, is in too many quarters entirely neglected, namely, returning to the soil the component parts taken off by various crops, and which is so generally practised in all good agricultural districts, by a careful rotation of crops. Liebig has well pointed out this: "It must be admitted (he says), as a principle of agriculture, that those substances which have been removed from a soil must be completely restored to it; and whether this restoration be effected by means of excrements, ashes, or bones, is in a great measure a matter of indifference." Again he remarks, "We could keep our fields in a constant state of fertility by replacing every year as much as we remove from them in the form of produce; but an increase of fertility, and consequent increase of crop, can only be obtained when we add more to them than we take away." Of all natural manures, therefore, the best for each description of plant is its own refuse, or ashes; enough of these can seldom, however, be obtained. But, as far as they can be restored, this principle is beginning to be acted upon by the sugar planters of the West Indies, who employ the waste leaves and ashes of the expressed stalk of the cane, after it has been used as fuel, to manure their cane-fields. The vine growers of Germany and the Cape also bury the cuttings of their vines around the roots of the plants. The cinnamon grower of the East returns the waste bark and cuttings of the shoots to the soil. And in the coco-nut groves of Ceylon, the roots of the trees are best manured with the husks of the nuts and decomposed poonac, or the refuse cake, after the oil has been expressed from the pulp. Analysis of soils is, perhaps, not so essential in countries where virgin land is usually in abundance, and the luxuriance of vegetation furnishes itself, by decomposition, abundant materials for replenishing the fertility of the soil. But there are some substances, such as muriate of soda, gypsum, phosphate, and other compounds of lime, which may be advantageously applied. Guano and expensive artificial manures, are seldom required, and, indeed, will not repay the planters for importing.

An experienced cultivator can generally judge by a superficial examination, aided by the situation, locality, and appearance of the soil, whether a certain portion of land is fitted for the profitable growth of any particular plant. Depth of soil, and facilities for deepening it, with the nature of the subsoil, so as to know whether it retains or parts with water, are also important considerations, because tap-rooted plants require free scope for penetrating deep into the ground.

A due supply of water is of vital importance to most crops—and therefore the extent and periods of the fall of rain are essential to be known, as it is not always possible to resort to irrigation. The quantity of labor required for previous tillage, cultivation, and harvesting of different crops, and the available supply, are primary essentials to be considered before entering upon the culture of any staple product, however remunerative it may appear in prospective. Facility and cost of transport to the nearest market or shipping port are the next desiderata to be ascertained, as well as a careful estimate of the cost of plant or machinery necessary.