Elements of agricultural chemistry, in

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RMM891AR–Elements of agricultural chemistry, in a course of lectures for the Board of agriculture (1815) (20618402093)

RM2AM3TNJ–A text-book on agricultural chemistry, for the use of academies, schools, and agriculturalists: comprising that portion of elementary chemistry which is necessary to a full understanding of the changes connected with vegetable organization, and an examination of the different manures, soils, crops, &c. . nute quantity of the other elements, a certainproportion, though very small is absolutely required:except a few of the elements which occur in certainplants only. What are atoms? Why are 16 and 32 given as the atomic weights ofsulphur a-nd zinc ] How many elements are concerned in vegetation ?

RMPG3KMD–. How crops grow. A treatise on the chemical composition, structure, and life of the plant, for all students of agriculture ... Agricultural chemistry; Growth (Plants). ELEMENTS OF ORGANIC STEUCTUEE. 223 Cellular Plants.—In those classes of vegetation which depart structurally to the least degree from the seed, and which belong to what are called the " lower orders,"* we find plants which consist entirely of cells throughout all the stages of their life, and indeed many are known which are but a single cell. The phenomenon of red snow, frequently observed in Alpine and Arctic regions

RMMA6JPD–. Elements of agricultural chemistry in a course of lectures for the Board of Agriculture

RMRWPT01–Elements of agricultural chemistry, in

RM2AX2WPX–The chemistry of plant and animal life . , which the plant takes from the soil duringgrowth. The term ash as used in chemistry differs fromthe term as ordinarily used in that the chemical a.sli ispure ash, free from unburned particles of carbon, and alsocontains elements, as sodium, chlorin, sulfur and phos-phorus, traces of which are volatile at a high tempera- i6o AGRICULTURAL CHEMISTRY ture. Crude ash is obtained by burning a substanceuntil all of the carbon isoxidized. Experiment 40.—Determina-tion of ash. Weigh to thesecond decimal place in grams,a dish given out for this experi-ment. The

RMPG3KKG–. How crops grow. A treatise on the chemical composition, structure, and life of the plant, for all students of agriculture ... Agricultural chemistry; Growth (Plants). ELEMENTS OF ORGANIC STKUCTUEE. 231 cases, however, the cells of plants are so small as to re- quire a i^owerfiil microscope to distinguish them,—arc, in fact, no more than l-1200th to l-200th of an inch in diam- eter ; many are vastly smaller. Growth.—The growth of a plant is nothing more than the aggregate result of the enlargement and multiplication of the cells which compose it. In most cases the cells at- tain their full si

RMMA6JNW–. Elements of agricultural chemistry in a course of lectures for the Board of Agriculture

RMRWPP2E–Elements of agricultural chemistry in

RM2CGGTMG–. Principles of agricultural chemistry [microform] . found in plants, in minute quantities. elements are essential or useful to plants are made by growing plants in pure water, to which the salts to be tested are added. This is known as the water culture method, and is used because it is comparatively easy to secure pure water and salts, but almost impossible to secure a sand or soil from which plants do not ex- ^ Jahresber. Agr. Chem., 1864, pp. 94, 99, 159; 1S66, p. 121. Exp. Sta.Record 3, p. 717; 7, p. 643. 12 PRINCIPLES OF AGRICULTURAL CHEMISTRY tract some substance. Only the fourteen elem

RMPG3KKM–. How crops grow. A treatise on the chemical composition, structure, and life of the plant, for all students of agriculture ... Agricultural chemistry; Growth (Plants). ELEMENTS OF ORGANIC STEUCTtTEE. 227. nucleus, but ai-e filled with a sap or juice containing citric acid and sugar. Li the pith of the rush, star-shaped cells are found. In common mould the cells are long and thread-like. In the so-called frog-spittle they are cylindrical and attached end to end. In the hark of many trees, in the stems and leaves of grasses, they are square or rectangular. Cotton-fiber, flax and Iiemp consist o

RMMA6JP2–. Elements of agricultural chemistry in a course of lectures for the Board of Agriculture

RMRWMXX3–Elements of agricultural chemistry, in

Elements of agricultural chemistry, in

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