Turnips may be sown any time in June, in rich land, well mellowed by cultivation. Very large crops are obtained, sown as late as the middle of July, or the first of August, on an inverted sod. The Michigan, or double-mould-board plow leaves the land light, and in admirable condition to harrow, and drill in turnips. In one instance, a successful root-grower cut two tons of hay to the acre, on the twenty-third of June, and after it was removed from the land spread eight cords of rotten kelp to the acre, and plowed in; after which about three cords of fine old compost manure were used to the acre, which was sown with ruta baga seed, in drills, three feet apart, plants thinned to eight or ten inches in the drill. No after cultivation was required. On the fifteenth of November he harvested three hundred and seventy bushels of splendid roots to the acre, carefully measured off. The nutritive equivalent of Swedish turnips as compared with good meadow hay is 676, taking hay as a standard at 100; that is, it would require 6.76 pounds of turnips to furnish the same nutriment as one pound of good hay; but fed in connection with other food--as hay, for example--perhaps five pounds of turnips would be about equal to one pound of hay. The English or round turnip is usually sown broadcast after some other crop, and large and valuable returns are often obtained. The Swede is sown in drills. Both of these varieties are used for the production of milk. The chief objection to the turnip crop is that it leaves many kinds of soil unfit for a succession of some other crops, like Indian corn, for instance. In some sections, no amount of manuring appears to make corn do well after turnips or ruta bagas. The MANGOLD WURTZEL, a variety of the common beet, is often cultivated in this country with great success, and fed to cows with advantage, furnishing a succulent and nutritive food in winter and spring. The crop is somewhat uncertain. When it does well, an enormous yield is often obtained; but, not rarely, it proves a failure, and is not, on the whole, quite as reliable as the ruta baga, though a more valuable crop when the yield is good. It is cultivated like the common beet in moist, rich soils; three pounds of seed to the acre The leaves may be stripped off, towards fall, and fed out, without injury to the growth of the root. Both mangolds and turnips should be cut with a root-cutter, before being fed out.