As to hay, there are many wet, rich soils which produce very large crops of grass, and it is possible that drainage might not always cause them to yield a thousand pounds more of hay to the acre, but the _quality_ of the hay from the drained soil, would, of itself, more than compensate for the drainage charge. The great benefit of the improvement, with reference to this crop, however, lies in the fact that, although wet, grass lands,—and by "wet" is meant the condition of undrained, retentive clays, and heavy loams, or other soils requiring drainage,—in a very few years "run out," or become occupied by semi-aquatic and other objectionable plants, to the exclusion of the proper grasses; the same lands, thoroughly drained, may be kept in full yield of the finest hay plants, as long as the ground is properly managed. It must, of course, be manured, from time to time, and care should be taken to prevent the puddling of its surface, by men or animals, while it is too wet from recent rain. With proper attention to these points, it need not be broken up in a lifetime, and it may be relied on to produce uniformly good crops, always equal to the best obtained before drainage. So far as Cotton and Tobacco are concerned, there are not many instances recorded of the systematic drainage of lands appropriated to their cultivation, but there is every reason to suppose that they will both be benefitted by any operation which will have the effect of placing the soil in a better condition for the uses of all cultivated plants. The average crop of tobacco is about 700 lbs., and that of cotton probably 250 lbs. An addition of one-fifth to the cotton crop, and of only one thirty-fifth to the tobacco crop, would make the required increase. The failure of the cotton crop, during the past season, (1866,) might have been entirely prevented, in many districts, by the thorough draining of the land. The advantages claimed for drainage with reference to the above-named staple crops, will apply with equal, if not greater force, to all garden and orchard culture. In fact, with the exception of osier willows, and cranberries, there is scarcely a cultivated plant which will not yield larger and better crops on drained than on undrained land,—enough better, and enough larger, to pay much more than the interest on the cost of the improvement. Yet, this advantage of draining, is, by no means, the only one which is worthy of consideration. Since the object of cultivation is to produce remunerative crops, of course, the larger and better the crops, the more completely is the object attained;—and to this extent the greatest benefit resulting from draining, lies in the increased yield. But there is another advantage,—a material and moral advantage,—which is equally to be considered.