The ORCHARD GRASS, or ROUGH COCKSFOOT, for pastures, stands pre-eminent. This is a native of this country, and was introduced into England, from Virginia, in 1764, since which time its cultivation has extended into every country of Europe, where it is universally held in very high estimation. The fact of its being very palatable to stock of all kinds, its rapid growth, and the luxuriance of its aftermath, with its power of enduring the cropping of cattle, have given it a very high reputation, especially as a pasture grass. It blossoms earlier than Timothy; when green, is equally relished by milch cows; requires to be fed closer, to prevent its forming tufts and growing up to seed, when it becomes hard and wiry, and loses much of its nutritive quality. As it blossoms about the same time, it forms an admirable mixture with red clover, either for permanent pasture or mowing. It resists drought, and is less exhausting to the soil than either rye grass or Timothy. The seed weighs twelve pounds to the bushel, and when sown alone requires about two bushels to the acre. The ROUGH-STALKED MEADOW GRASS is somewhat less common than the June grass, but is considered equally valuable. It grows best on moist, sheltered meadows, where it flowers in June and July. It is readily distinguished from June grass by its having a rough sheath, while the latter has a smooth one, and by having a fibrous root, while the root of the other is creeping. It possesses very considerable nutritive qualities, and comes to perfection at a desirable time, and is exceedingly relished by cattle, horses and sheep. For suitable soils it should form a portion of a mixture of seeds, producing, in mixture with other grasses which serve to shelter it, a large yield of hay, far above the average of grass usually sown on a similar soil. It should be cut when the seed is formed. Seven pounds of seed to the acre will make a good sward. The grass loses about seventy per cent. of its weight in drying. The nutritive qualities of its aftermath exceed very considerably those of the crop cut in the flower or in the seed. FOWL MEADOW GRASS is another indigenous species, of great value for low and marshy grounds, where it flourishes best; and, if cut and properly cured, makes a sweet and nutritious hay, which, from its fineness, is eaten by cows without waste. According to Sinclair--who experimented, with the aid of Sir Humphrey Davy, to ascertain its comparative nutritive properties--it is superior in this respect to either meadow foxtail, orchard grass, or tall meadow oat grass; but it is probable that he somewhat overrates it. If allowed to stand till nearly ripe, it falls down, but sends up innumerable flowering stems from the joints, so that it continues green and luxuriant till late in the season. It thrives best in mixture with other grasses, and deserves a prominent place in all mixtures for rich, moist pastures, and low mowing-lands.