It may be presumed, that, while these figures are not _absolutely_, they are _relatively_, correct. In other words, we may conclude, that red-clover leaves more nitrogen, phosphoric acid, and potash, in the roots and stubble per acre, than any other of the crops named. The gross amount of dry substance in the roots, and the gross amount of ash per acre, are considerably exaggerated, owing to the evidently large quantity of dirt attached to the roots and stubble. For instance, the gross amount of ash in Lucern is given as 1,201.6 lbs. per acre; while the total amount of lime, magnesia, potash, soda, sulphuric and phosphoric acids, is only 342.2 lbs. per acre, leaving 859.4 lbs. as sand, clay, iron, etc. Of the 1,919.9 lbs. of ash in the acre of clover-roots and stubble, there are 1,429.4 lbs. of sand, clay, etc. But even after deducting this amount of impurities from a gross total of dry matter per acre, we still have 7,492.2 lbs. of dry roots and stubble per acre, or nearly 3¼ tons of _dry_ roots per acre. This is a very large quantity. It is as much dry matter as is contained in 13 tons of ordinary farm-yard, or stable-manure. And these 3¼ tons of dry clover-roots contain 191½ lbs. of nitrogen, which is as much as is contained in 19 tons of ordinary stable-manure. The clover-roots also contain 74¾ lbs. of phosphoric acid per acre, or as much as is contained in from 500 to 600 lbs. of No. 1 rectified Peruvian guano. “But the phosphoric acid,” said the Doctor, “is not soluble in the roots.” True, but it was soluble when the roots gathered it up out of the soil. “These figures,” said the Deacon, “have a very pleasant look. Those of us who have nearly one-quarter of our land in clover every year, ought to be making our farms very rich.” “It would seem, at any rate,” said I, “that those of us who have good, clean, well-drained, and well-worked land, that is now producing a good growth of clover, may reasonably expect a fair crop of wheat, barley, oats, corn, or potatoes, when we break it up and plow under all the roots, which are equal to 13 or 19 tons of stable-manure per acre. Whether we can or can not depend on these figures, one thing is clearly proven, both by the chemist and the farmer, that a good clover-sod, on well-worked soil, is a good preparation for corn and potatoes.” MANURES FOR WHEAT.