_Jacob Downing, Arapahoe county._--I introduced alfalfa into Colorado in 1862, and have between 500 and 700 acres. It is on upland, clay, sandy and loam soil, with some adobe subsoil, but mostly sandy loam; it is generally dry to sand rock, and then it is necessary to drill 50 to 100 feet to get water. The plant will not thrive where there is hardpan, but will grow in any soil that is dry. Unlike most other forage plants it derives considerable nourishment from the air and water, though too much moisture will kill it. After deep plowing and thorough pulverizing of the soil, the land should be scraped thoroughly smooth, as this cannot be done after sowing, and is needed to make the mower work smoothly. I sow about 25 pounds to the acre, drilling in about two inches deep, 12¹⁄₂ pounds one way, and the other 12¹⁄₂ pounds across it, thus making an even stand. Prefer to sow in the spring, early. After the plant is eight inches high, it may be cut and used for feed, but is not very good. After this there will be no weeds. It matures in three years, and after that is good for seed. I have seen, near the city of Mexico, fields of alfalfa 300 years old that had been constantly cropped and never reseeded. It will last 1000 years, and possibly forever. Irrigate from streams, as is required; when there is a great deal of heat and wind, probably three times. The water must not run too long, or the plant will be killed, and the land should be kept as dry as possible during the winter, particularly in cold climates, as on wet soil alfalfa winterkills. Well water is better than the stream, provided it is pumped into a reservoir and allowed to get warm. Water is brought from the streams by ditches. Less water can be used the first year than after the plant is matured. I am five miles west of Denver, and 500 feet above the city, in warm valleys. With plenty of water, I can obtain three cuttings a year. Have raised as much as 3¹⁄₂ tons to the acre at one cutting, and my highest yield of seed per acre has been nine bushels. Hay is cut when the plant is in bloom, cured until it is dry to the touch of the hand. Stacking by hand makes the best hay, as machinery is likely to pack it in bunches, causing it to heat and become dusty. Hay in the stack costs about $1.50 per ton. Baling costs $2 per ton; 100-pound bales are well esteemed, but it is probable that large bales keep better than small, if properly cured. The seed pod assumes the form of a cornucopia, and, when the seed is ripe, it is of a rich brown or mahogany color. The first crop is preferable for seed, and should be cut and stacked as the hay is. It can be left and threshed when most convenient, but the longer it remains in the stack the more easily its threshes. The ordinary threshing machine does for the alfalfa, but the seed must be fanned to be marketable. Six bushels is a common yield, and the cost of threshing and cleaning is probably 25 cents per bushel. The price of hay has