How shall we plow? All land should be subsoiled, except that having a light, porous subsoil; one deep plowing on such land is sufficient. Subsoiling is done by using two teams at once--one with a common plow, running deep, and the other with a subsoil-plow with no mould-board, and which will, consequently, stir and disintegrate the earth to the depth at which it runs, without throwing it to the surface. The next surface-furrow will cover up this loosened subsoil. In this way, land may be plowed eighteen inches deep, to the great benefit of any crop grown on it. If the surface be well manured, this method of plowing will place the manure between the first furrow and the subsoil, and increase its value. Such plowing is very valuable on land for young fruit-trees. There is another method, which we denominate double-plowing, which is more beneficial than ordinary subsoiling: it is performed by two common plows, one following in the furrow of the other; the first furrow need not be very deep--let the furrow in the bottom of the first be as deep as possible, and thrown out upon the surface; the next furrow will throw the surface and manure into the bottom of the deep furrow; the next furrow will cover this surface-soil and manure very deep, and, as manure always works up, it will impregnate the whole. This, for garden-vegetables, berries, nurseries, or young orchards, is the best form of plowing that we have ever tried. It may be done with one team, by simply changing the gauge of the clevis every time round, gauging it light for the first furrow, and deep for the second. We once prepared a plat in this way with one team, on which cabbages made a remarkable growth, even in a dry season. Still a farther improvement would be a light coat of fine manure on the surface. All furrows, in every description of plowing, should be near enough together to move the whole, leaving no hard places between them. The usual "cut and cover" system, to get over a large area in a day, is miserable economy. The more evenly and flatly land can be turned over in plowing, the better it will be; it retards the growth of weeds, and secures a better action upon substances plowed under. An exception to deep plowing is in breaking up the original prairies of the West: they have to be broken with plows kept sharp as a knife, and not more than two inches deep. The grass then dies and the sod rots. But plowed deep, the grass comes up through the turf, and will prove troublesome for two or three years. It must also be broken at a certain season of the year, to insure success. It may be profitably done for two months after the grass gets a good start in the spring.