THE ROTHAMSTED MEMOIRS ON AGRICULTURAL CHEMISTRY AND PHYSIOLOGY |
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Common terms and phrases
1000 dry matter accumulation acre per annum Agricultural Ammonium ammonium-salts amount of nitrogen Appendix-Table applied artificial manures Ash pure ash-constituents average produce barley bushels per acre carbon cent Chlorine chlorophyll clover cold common Turnips composition considerably crops cwts Deduct deficiency depth differently manured dung estimated excess exhaustion experiments fallow farmyard manure favourable Ferric oxide Fresh produce grain and straw grain-ashes grown growth increase land leaf leguminous less Lime lower Magnesia manure-value manured plots mineral constituents Mixed mineral manure nitrate of soda nitric acid nitrogen as nitric nitrogenous manure percentage of nitrogen percentage of potash phosphoric acid Phosphoric anhydride plant Produce per Acre rain residue roots Rothamsted salts of ammonia samples seasons second period shows Silica straw-ashes subsoil sulphate sulphuric acid Sulphuric anhydride superphosphate supply surface soil Table temperature tons total nitrogen total produce Trifolium repens tubers unmanured vegetation weight per bushel wheat whilst yield
Popular passages
Page 42 - I propose to take up the subject of the feeding of animals, for the production of meat, milk, and manure, and for the exercise of force — that is, for their labour.
Page 30 - I shall be happy if I succeed in attracting the attention of men of science to subjects which so well merit to engage their talents and energies. Perfect agriculture is the true foundation of all trade and industry — it is the foundation of the riches of states.
Page 18 - As an immediate effect of the manifestation of mechanical force, we see that a part of the muscular substance loses its vital properties, its character of life ; that this portion separates from the living part, and loses its capacity of growth and it?
Page 28 - Transactions of the Highland and Agricultural Society of Scotland, ' ' Vol. 22, says : "The greatest practical obstacle in the way of agricultural organization is generally the difficulty of finance. A very large number of those who might benefit most by co-operation are prevented from taking advantof it because they deal on long credit with the merchants who supply them.
Page 20 - The amount of tissue metamorphosed in a given time, may be measured by the quantity of nitrogen in the urine. "The sum of the mechanical effects produced in two individuals, in the same temperature, is proportional to the amount of nitrogen in their urine; whether the mechanical force has been employed in voluntary or involuntary motions, whether it has been consumed by the limbs, or by the heart and other viscera.
Page 30 - But a rational system of Agriculture cannot be formed without the application of scientific principles ; for such a system must be based on an exact acquaintance with the means of nutrition of vegetables, and with the influence of soils and actions of manure upon them.
Page 7 - In our earlier papers we had concluded that, excepting the small amount of combined nitrogen annually coming down in rain and the minor aqueous deposits from the atmosphere, the source of the nitrogen of...
Page 18 - ... and all experience proves, that this conversion of living muscular fibre into compounds destitute of vitality is accelerated or retarded according to the amount of force employed to produce motion. Nay, it may safely be affirmed, that they are mutually proportional ; that a rapid transformation of muscular fibre, or, as it may be called, a rapid change of matter...
Page 96 - It has been argued that, in the last stages of the decomposition of organic matter in the soil, hydrogen is evolved, and that this nascent hydrogen combines with the free nitrogen of the atmosphere, and so forms ammonia.
Page 10 - ... characters of season and the equally fluctuating characters of growth and produce. It is, in fact, the distribution of the various elements making up the season, their mutual adaptations, and their adaptation to the stage of growth of the plant, which throughout influence the tendency to produce quantity or quality, it not...