10. As to Commercial Fertilizers, I think I have been well paid for the application of Gypsum (Plaster of Paris) to my upland grass at the rate of one bushel per acre per annum, while my tillage has been supplied with it by dusting my stables with it after each cleaning, and so applying it mingled with barn-yard manures. Lime (unslaked) from burned oyster-shells, costing me from 25 to 30 cents per bushel delivered, I have applied liberally, and I judge, with profit. Bones, ground, (the finer the better) I have largely and I think advantageously used; but my land had been mainly pastured for nearly two centuries before I bought it, and thus continually drained of Phosphates, yet never replenished: so my experience does not prove that the farmers of newer lands ought to buy bones, though I advise them to apply all they can save or pick up at small cost. Pound them very fine with a beetle or ax-head on a flat stone, and give them to your fowls: if they refuse a part of them, your soil will prove less dainty. I am not sure that it pays to buy any manufactured Phosphate when you can get Raw Bone; though I doubt not that, for instant effect, the Phosphate is far superior. As to Guano, it has not paid me; but that may be the fault of careless or unskillful application. I judge that any one who has to deal with sterile sands that will not bring Clover, may wisely apply 400 pounds of Guano per acre, provided he has nothing else that will answer the purpose. After he has produced one good stand of Clover, I doubt that he can afford to buy more Guano, unless he can apply it to better purpose than I have yet done. I have a strong impression that most farmers can do better at making and saving fertilizers than by buying them. Lime and Sulphur (Gypsum), if your soil lacks them, you must buy; but a good farmer who keeps even a span of horses, three or four cows, as many pigs, and a score of fowls, can make for $100 fertilizers which I would rather have than two tuns of Guano, costing him $180 to $200. If he has a patch of bog or a miry pond on his farm--any place where frogs will live--he can dig thence, in the dryest time next Fall, two or three hundred loads of Muck, which, having been left to dry on the nearest high ground till November or later, and then drawn up and dumped into his barn-yard, pig-pen, and fowl-house, will be ready to come out next Spring in season for corn-planting, and, being liberally applied, will do as much for his crop as two tons of Guano would, and will strengthen his land far more. If he has no Muck, and no neighbor who can spare it as well as not, let him at midsummer cut all the weeds growing on and around his farm, and in the Fall gather all the leaves that can be impounded, using these as litter for his cattle and beds for his pigs, and he will be agreeably surprised at the bulk of his heap next Spring.