The Rothamsted Memoirs on Agricultural Chemistry and Physiology, Volume 1William Clowes and Sons, Limited, 1893 |
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Common terms and phrases
14 Tons Farmyard agricultural ammoniacal salts amount of nitrogen annum applied artificial manures available nitrogen average annual barley Baron Liebig bulb bushels of dressed calcined bone-dust carbonaceous carbonic acid cent character Clover Cock's-foot comparatively composition considerably contained corn and straw cwts different manures Direct Mineral Manure dressed corn dry matter dry substance dung equal experiments fact given grain grass grown growth guano land less Lois Weedon magnesia Meadow mineral constituents mineral matter Mixed Alkalies Mixed Mineral Manure Muriate Ammonia Muriate of Ammonia Nitrate of Soda Nitrogen per Acre nitrogen supplied nitrogenous manures obtained pearlash percentage of nitrogen phosphate phosphoric acid plants potash proportion quantity Rape Cake rape-cake rotation Rothamsted Sawdust season seed SERIES 2.-With silica soil Sulphate and Muriate sulphate of ammonia Sulphate of Potash sulphuric acid Superphosphate of Lime Table Tons Farmyard Manure Total Corn total produce turnips unmanured plot wheat whilst yield
Popular passages
Page 19 - the crops on a field diminish or increase in exact proportion to the diminution or increase of the mineral substances conveyed to it in manure...
Page 58 - It is certain that this incessant removal of the phosphates must tend to exhaust the land and diminish its capability of producing grain. The fields of Great Britain are in a state of progressive exhaustion from this cause, as is proved by the rapid extension of the cultivation of turnips and mangel-wurzel — plants which contain the least amount of the phosphates, and therefore require the smallest quantity for their development.
Page 9 - ... in the same year, in the adjoining field. Notwithstanding this, the soil from. which the clover had been taken was in a condition to yield 14 bushels more wheat per acre than that upon which wheat had been previously grown ; the yield of wheat after clover, in these experiments, being fully equal to that in another field, where very large quantities of manure were used. Taking all these circumstances into account, is there not presumptive...
Page 59 - If a rich and cheap source of phosphate of lime and. the alkaline phosphates were open to England, there can be no question that the importation of foreign corn might be altogether dispensed with in a short time.
Page 16 - By an exact estimation of the quantity of ashes in cultivated plants growing in various kinds of soils, and by their analysis, we will learn those constituents of the plants which are variable and those which remain constant. Thus, also, we will attain a knowledge of the quantities of all the constituents removed from the soil by different crops. " The farmer will thus be enabled, like a systematic manufacturer, to have a book attached to each field, in which he will note the amount of the various...
Page 7 - The crops on a field diminish or increase in exact proportion to the diminution or increase of the mineral substances conveyed to it in [the"] manure.
Page 6 - The average annual produce of the soil and season, unaided by manure, amounted to about three-fourths of the estimated yield of the neighbourhood under ordinary cultivation — to two-thirds of that of a plot manured by farm-yard dung — and to fully half as much as might be expected from as high a course of farming as the soil and the climate with which we have to deal would justify us in adopting. It is remarkable too that, whilst the quality of this natural produce, as indicated by the relation...
Page 7 - When salts of ammonia were added to the mineral manures, the produce of clover-hay was, upon the whole, less than where the mineral manures were used alone. The wheat grown after the clover on the unmanured plot gave, however...
Page 11 - As we have in substance frequently said, it is but a truism to assert that the growing plant must have within its reach a sufficiency of the mineral constituents of which it is to be built up.
Page 33 - ... processes leave them, very considerably increase the peristaltic action, and hence the alimentary canal is cleared much more rapidly of its contents. It is also well known that the poorer classes almost invariably prefer the whiter bread ; and among some of them who work the hardest, and who, consequently, would soonest appreciate a difference in nutritive quality (navvies for example), it is distinctly stated that their preference for the whiter bread is founded on the fact that the browner...