| 单词 | nitrify |
| 例句 | The presence of earthworms increases the nitrifying powers of the soil bacteria and decreases putrifaction of the soil. Silent Spring 1962-09-27T00:00:00Z But then nitrifying soil bacteria go to work, wreaking environmental havoc. Grass gets greener 2013-09-18T17:20:44.500Z The hard, nitrified rock held out stoutly against the assaults of both iron and gunpowder; and much time was spent in hollowing out the basin in which the lighthouse was to be fixed. Triumphs of Invention and Discovery in Art and Science 2011-07-19T02:00:21.280Z In addition to collecting nitrate samples, we’ll be filtering seawater and taking the filters home to see if DNA from nitrifying organisms is present. Scientist at Work: Solving the Microbial Whodunit 2011-03-30T16:29:53Z The research results reveal a link between fire, charcoal deposition, nitrification, and abundance of nitrifying organisms in coniferous forests of the inland Northwestern US. Forest Fires Help Power the Nitrogen Cycle 2010-08-10T14:23:00Z To this class of organism the nitrifying organisms belong. Manures and the principles of manuring Called brachialactone, it reduces nitrous oxide emissions by blocking enzymatic pathways in nitrifying bacteria. Grass gets greener 2013-09-18T17:20:44.500Z The work of the nitrifying germs is called nitrification. The First Book of Farming This theory was most unsatisfactory, as neither solutions of pure ammonia, nor of any of its salts, could be nitrified in the laboratory by simple exposure to air. Scientific American Supplement, No. 470, January 3, 1885 There are apparently several different kinds of nitrifying bacteria with different powers. The Story of Germ Life He prepared vessels and solutions, carefully purified from organic matter, and these solutions he sowed with the nitrifying organism. Manures and the principles of manuring I am glad that the nitrogen-fixing and nitrifying bacteria do business chicfly in the surface soil, because we are not prepared to correct the acidity to any very great depth. The Story of the Soil; from the Basis of Absolute Science and Real Life, To do their work well the nitrogen-fixing germs and the nitrifying germs require certain conditions. The First Book of Farming The heating of soil to the same temperature effectually destroys its nitrifying power. Scientific American Supplement, No. 470, January 3, 1885 The gypsum neutralises the alkalinity of nitrifying solutions by converting the alkaline ammonium carbonate into neutral ammonium sulphate, the calcium carbonate being precipitated. Manures and the principles of manuring It would further seem that the nitrogen of the subsoil is less easily nitrified than that of the surface-soil. Manures and the principles of manuring The other two kinds are the true nitrifying bacteria. The Story of the Soil; from the Basis of Absolute Science and Real Life, The soil must be well ventilated to supply nitrogen for the nitrogen-fixing germs and oxygen for the nitrifying germs. The First Book of Farming The nitrifying organism has been submitted as yet to but little microscopical study; it is apparently a micrococcus. Scientific American Supplement, No. 470, January 3, 1885 By making the nitrification intensive, he was able to obtain considerable quantities of carbon from the nitrified solutions by the process of wet combustion. Manures and the principles of manuring The nitrifying organisms are probably chiefly confined to the soil, and do not usually occur in rain or in the atmosphere. Manures and the principles of manuring Now, the nitrifying bacteria require certain conditions, otherwise they will not perform their functions. The Story of the Soil; from the Basis of Absolute Science and Real Life, The nitrifying germs require phosphoric acid, potash and lime in the soil. The First Book of Farming The Distribution of the Nitrifying Organism in the Soil.—Three series of experiments have been made on the distribution of the nitrifying organism in the clay soil and subsoil at Rothamsted. Scientific American Supplement, No. 470, January 3, 1885 As found in suspension in a freshly nitrified solution, it consists largely of nearly spherical corpuscles, varying extremely in size. Manures and the principles of manuring It is at least quite probable that all the organic forms of nitrogen have first to be converted into ammonia ere they are nitrified. Manures and the principles of manuring These forms are universally present in nitrifying cultures. Manures and the principles of manuring Like the nitrifying germs they need oxygen, and when they cannot get it more readily elsewhere they take it from the nitric acid and nitrates. The First Book of Farming It appeared of interest to ascertain to what extent nitrification would proceed in a dilute solution of urine without the addition of any substance save the nitrifying ferment. Scientific American Supplement, No. 470, January 3, 1885 This is the reason why strong urine solutions do not nitrify. Manures and the principles of manuring When, however, a small portion of a nitrifying soil was added, the power was regained. Manures and the principles of manuring The reason of its favourable action is probably because it neutralises the alkalinity of nitrifying solutions. Manures and the principles of manuring The breaking down of the humus and building of the nitrogen into other substances is the work of another set of bacteria or germs called nitrifying germs. The First Book of Farming Sewage will be thoroughly nitrified only when a sufficient supply of calcium carbonate, or some other base, is available. Scientific American Supplement, No. 470, January 3, 1885 The absence of the nitrifying organisms in certain soils, such as peaty and forest soils, may be thus accounted for. Manures and the principles of manuring It follows from this that sulphate of ammonia, the most common of ammoniacal manures, is one of the most speedily nitrified when applied to the soil. Manures and the principles of manuring The rate at which the nitrogen compounds in farmyard manure become nitrified, when incorporated with the soil, vary very much according to circumstances. Manures and the principles of manuring This allows the nitrogen of the nitrates to escape as a free gas into the air again, and the work of the nitrogen-fixing and nitrifying germs is undone and the nitrogen is lost. The First Book of Farming It would appear, therefore, that in a clay soil the nitrifying organism is confined to about 18 inches from the surface; it is most abundant in the first 6 inches. Scientific American Supplement, No. 470, January 3, 1885 The quantity of nitrifying organism present has also a marked effect. Scientific American Supplement, No. 470, January 3, 1885 As we should expect, such a manure as shoddy is very slowly nitrified. Manures and the principles of manuring A solution receiving an abundant supply of the ferment will exhibit speedy nitrification, and strong solutions may by this means be successfully nitrified, which with small seedings would prove very refractory. Scientific American Supplement, No. 470, January 3, 1885 This, we have learned, is done through the aid of the nitrifying germs. The First Book of Farming A thin layer of solution will nitrify sooner than a deep layer, owing to the larger proportion of oxygen available. Scientific American Supplement, No. 470, January 3, 1885 Far stronger solutions of ammonium chloride can be nitrified than of ammonium carbonate, if the solution of the former salt is supplied with calcium carbonate. Scientific American Supplement, No. 470, January 3, 1885 Finding that under these conditions the nitrifying organism increased enormously and displayed its full vigour, he proceeded further to determine the amount of carbonaceous organic matter formed in solutions after the introduction of the organism. Manures and the principles of manuring |
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