Rothamsted Memoirs on Agricultural Chemistry and Physiology, Volume 1D. J. Jeffrey, 1893 - Agricultural chemistry |
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Common terms and phrases
14 Tons Farmyard agricultural ammonia-salts amount of nitrogen amount of produce applied Artificial Manures assimilation atmosphere available nitrogen barley Baron Liebig bulb calcined bone-dust carbonaceous carbonic acid cent Clover comparatively composition considerably contained cwts different manures Direct Mineral Manure dressed corn Drilled Manures dry matter dry substance effect equal exhaustion experimental experiments fact fallow farm given grain grass grown growth guano increase land large amount Leguminous herbage less Lois Weedon magnesia means mineral constituents mineral matter Mixed Alkalies Mixed Mineral Manure Muriate Ammonia Muriate of Ammonia Nitrate of Soda nitrogenous manures obtained pearlash percentage of nitrogen phosphate phosphoric acid potash proportion quantity Rape Cake rape-cake rotation Rothamsted salts Sawdust season seed Series silica soil subsoil Sulphate and Muriate sulphate of ammonia Sulphate of Potash sulphuric acid Superphosphate of Lime Table Tons Farmyard Manure total produce turnips unmanured plot weight wheat whilst yield
Popular passages
Page 22 - 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 101 - ... 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 42 - England , there can be no question that the importation of foreign corn might be altogether dispensed with after a short time. For these materials England is at present dependent upon foreign countries, and the high price of guano and of bones prevents their general application, and in sufficient quantity. Every year the trade in these substances must decrease, or their price will rise as the demand for them increases. According to these premises, it cannot be disputed, that the annual expense of...
Page 41 - 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 5 - ... system will be applicable as manure, on the large scale, only to succulent crops, and especially to grass-land ; and, so far as this is the case, they will of course not directly contribute to the restoration, to the land under tillage, of the mineral constituents sent from it in its produce of corn and meat. When other descriptions of produce than corn and meat, such as roots, hay, or straw, are largely sold, compensation is generally made by the return to the land of stable- or town-manures...
Page 9 - In conclusion, then : if the theory of Baron Liebig simply implies that the growing plant must have within its reach a sufficiency of the mineral constituents of which it is to be built up...
Page 32 - ... adaptation of climatic circumstances to stage of growth of the plant, in almost every case, it would indeed be anomalous, did we not find a corresponding variation on some point or other, in the characters or composition of the crop. Still, we have the fact broadly marked, that within the range of our own locality and climate, high maturation of the wheat crop is, other things being equal, generally associated with a high percentage of dry substance, and a low percentage of both mineral and nitrogenous...
Page 4 - Ibs. nitrogen per acre). 4th season (commencing in 1859); the three previous seasons sawdust alone. Plot 4. 400 Ibs. ammonia-salts. Plot 5. 400 Ibs. ammonia-salts, and 2000 Ibs. sawdust. Plot 6. 275 Ibs. nitrate of soda of commerce (containing about 41 Ibs. nitrogen). 5th season (commencing 1858). Plot 7. 550 Ibs. nitrate of soda (containing about 82 Ibs. nitrogen). 5th season (commencing in 1858). Plot 8. Mixed mineral manure, composed of — 300 Ibs. sulphate of potass. 200 Ibs. sulphate of soda....
Page 17 - ... 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 passes through them too rapidly; consequently, before their systems have extracted from it as much nutritious matter as it ought to yield them.
Page 72 - The amount of the latter therefore — (ie) the available nitrogen — is the measure of the increased produce of grain which will be obtained. 4. That the beneficial effects of rotation, in increasing the production of saleable produce (so far as they are chemical), are not explained by the fact of one plant taking from the soil more of the different mineral constituents than another, but depend on the property of the so-called green or fallow crops of bringing, or conserving, upon the farm, more...