Talks on Manures: A Series of Familiar and Practical Talks Between the Author and the Deacon, the Doctor, and Other Neighbors, on the Whole Subject of Manures and FertilizersOrange Judd Company, 1893 - 358 páginas |
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Términos y frases comunes
14 tons 40 bushels ammonia-salts amount of nitrogen applied artificial manures ashes available nitrogen average barley barn-yard better bone-dust bran bushels of wheat bushels per acre cent clover-hay clover-roots cows crop of wheat cultivated Deacon Doctor Dressed Corn dung Equal to ammonia experiments fact farm farm-yard manure farmers feed fermentation fertility field fresh manure grain grass grow growth gypsum heap horses increase insoluble land large crops load magnesia manure contains mineral matter Mixed mineral manures mown nitrate of soda nitric acid nure oats organic matter Peruvian guano phosphate phosphate of lime phosphoric acid pig-pens pigs plant-food plants plowed potash potatoes pounds produce quantity rich richer roots ROTHAMSTED salts season seed sheep silica six inches soil soluble sown spread spring stable-manure straw sulphate of ammonia sulphuric acid summer-fallow superphosphate of lime top-dressing Total turnips urine Volcker weight winter worth yard yield
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Página 68 - ... 20. If rain is excluded from dung-heaps, or little rain falls at a time, the loss in ammonia is trifling, and no saline matters of course are removed ; but, if much rain falls, especially if it descends in heavy showers upon the dungheap, a serious loss in ammonia, soluble organic matters, phosphate of lime, and salts of potash is incurred, and the manure becomes rapidly deteriorated in value, whilst at the same time it is diminished in weight.
Página 160 - A good crop of clover removes from the soil more potash, phosphoric acid, lime, and other mineral matters, which enter into the composition of the ashes of our cultivated crops than any other crop usually grown in this country. 2. There is fully three times as much nitrogen in a crop of clover as in the average produce of the grain and straw of wheat per acre.
Página 136 - ... as hay, the land, far from being less fertile than before, is peculiarly well adapted, even without the addition of manure, to bear a good crop of wheat in the following year, provided the season be favorable to its growth. This fact, indeed, is so well known that many farmers justly regard the growth of clover as one of the best preparatory operations which the land can undergo in order to its producing an abundant crop of wheat in the following year. It has further been noticed that clover...
Página 68 - Farmyard manure becomes deteriorated in value, when kept in heaps exposed to the weather ; the more the longer it is kept.
Página 156 - This is a very much larger amount of nitrogen than occurred in the other soil, and shows plainly that the total amount of nitrogen accumulates, especially in the surface soil, when clover is grown for seeds ; thus explaining intelligibly, as it appears to me, why wheat, as stated by many practical men, succeeds better on land where clover is grown for seed than where it is mown for hay. " All the three layers of the soil after clover-seed are richer in nitrogen than the same sections of the soil...
Página 136 - This fact, indeed, is so well known that many farmers justly regard the growth of clover as one of the best preparatory operations which the land can undergo in order to its producing an abundant crop of wheat in the following year. It has further been noticed that clover mown twice leaves the land in a better condition, as regards its wheat-producing capabilities, than when mown once only for hay, and the second crop fed off on the land by sheep...
Página 136 - ... are in part restored in the sheep excrements, yet contrary to expectation, this partial restoration of the elements of fertility to the land has not the effect of producing more or better wheat in the following year than is reaped on land from off which the whole clover crop has been carried, and to which no manure whatever has been applied. Again, in the opinion of several good practical agriculturists with whom I have conversed on the subject, land whereon clover has been grown for seed in...
Página 150 - The three layers of soil, dried and reduced to powder, were mixed together, and a prepared average sample, when submitted to analysis, yielded the following results: Composition of Clover Soil, 18 inches deep, from part of 11 acre Field, twice mown for Hay.