Organic Chemistry in Its Applications to Agriculture and PhysiologyTaylor and Walton, 1840 - 387 pages |
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Common terms and phrases
absorbed acetic acetic acid action affinity alcohol alkalies ammonia animals ashes assimilation atmosphere atoms attraction azotised blood body capable carbonic acid cause cent charcoal chemical colour combustion common composition compounds condition consequence constituents containing nitrogen converted cubic cyanic acid decay decomposed decomposition dissolved earth effect elements of water enter into combination eremacausis evaporation excrements exist extracted fermentation fertility formation gluten growth gypsum Hessian humic acid humus hydrogen influence inorganic juice kind leaves liquid magnesia manure matter nitric acid nitrogen nourishment nutrition obtained organic acids oxalic acid oxide oxygen peculiar phosphate plants possess potash present produced proportion putrefaction quantity of nitrogen rain-water roots salts seeds silicate of potash small quantity soil soluble solution stances starch substances containing sugar sulphuric acid supply tained temperature tion transformation urea urine vegetable volatile wheat whilst wood woody fibre yeast yield
Popular passages
Page 195 - Hence it is evident that it would be of much importance to agriculture if none of the human urine were lost.
Page 140 - The general object of agriculture is to produce, in the most advantageous manner, certain qualities, or a maximum size, in certain parts or organs of particular plants. Now this object can be attained only by the application of those substances which we know to be indispensable to the development of these parts or organs, or by supplying the conditions necessary to the production of the qualities desired. The rules of a rational system of agriculture should enable us, therefore, to give to each plant...
Page 7 - ... unnecessary : the obvious difference in the growth of plants according to the known abundance or scarcity of HUMUS in the soil, seemed to afford incontestable proof of its correctness. * Yet, this position, when submitted to a strict examination, is found to be untenable, and it becomes evident from most conclusive proofs, that humus IN THE FORM IN WHICH IT EXISTS IN THE SOIL, does not yield the smallest nourishment to plants.
Page 214 - I was very unwilling to allow my vines to decay, as they are my only source of support in my old age; and I often walked very anxiously amongst them, without knowing what I should do. At last my necessities became greater, which made me more attentive, so that I remarked that the grass was longer on some spots where the branches of the vine fell than on those on which there were none. So I thought upon the matter, and then said to myself : -If these branches can make the grass large, strong, and...
Page 184 - The most easy and practical mode of effecting their division is to pour over the bones, in a state of fine powder, half of their weight of sulphuric acid diluted with three or four parts of water...
Page 182 - We could keep our fields in a constant state of fertility by replacing every year as much as we remove from them in the form of produce; but an increase of fertility, and consequent increase of crop, can only be obtained when we add more to them than we take away.
Page 47 - Each new radicle fibril which a plant acquires may be regarded as constituting at the same time a mouth, a lung, and a stomach. The roots perform the functions of the leaves from the first moment of their formation : they extract from the soil their proper nutriment, namely, the carbonic acid generated by the humus.
Page 345 - From the foregoing facts it follows, that a body in the act of decomposition (it may be named the exciter,) added to a mixed fluid in which its constituents are contained, can reproduce itself in that fluid, exactly in the same manner as new yeast is produced when yeast is added to liquids containing gluten.
Page 72 - Let us picture to .ourselves the condition of a well-cultured farm, so large as to be independent of assistance from other quarters. On this extent of land there is a certain quantity of nitrogen contained both in the corn and fruit which it produces, and in the men and animals which feed upon them, and also in their excrements. We shall suppose this quantity to be known. The land is cultivated without the importation of any foreign substance containing nitrogen. Now, the products of this farm must...
Page 105 - All kinds of grasses, the Equitetaeese, for example, contain in the outer parts of their leaves and stalk a large quantity of silicic acid and potash, in the form of acid silicate of potash.