Fertilisers and ManuresE. P. Dutton, 1912 - 384 pàgines |
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Frases i termes més freqüents
acre action ammonium salts amount of nitrogen analysis applied average bacteria barley basic slag bone meal bushels calcium carbonate calcium phosphate carbonate of lime carbonic acid cent citric acid clay clover composition compounds constituents containing coprolites cwts deposits dissolved dressing dung effect example excreta farmer farming farmyard manure fertiliser field fish guano grain grass land grown growth guano gypsum humus increased insoluble iron kainit leaf litter loss magnesia mangolds material mineral mixture nitrate of soda nitrification nitrogen supplied nitrogenous manure obtained oxidation Peruvian guano phosphate of lime phosphatic manures phosphoric acid plant food plots receiving ploughed potash salts potassium produced proportion quantities rape cake residues rotation Rothamsted experiments samples season seed shoddy sodium soil water soluble solution sown steamed bone flour straw substances sulphate of ammonia sulphuric acid superphosphate Swedes TABLE tons tri-calcium phosphate turnips unmanured plot wheat yield
Passatges populars
Pàgina 119 - 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...
Pàgina 119 - ... add one hundred parts of water, and sprinkle this mixture over the field before the plough. In a few seconds, the free acids unite with the bases contained in the earth, and a neutral salt is formed in a very fine state of division.
Pàgina 108 - England is robbing all other countries of the condition of their fertility. Already, in her eagerness for bones, she has turned up the battle-fields of Leipzig, of Waterloo, and of the Crimea; already from the catacombs of Sicily she has carried away the skeletons of many successive generations.
Pàgina 349 - Every person who sells for use as a fertiliser of the soil any article which has been subjected to any artificial process in the United Kingdom, or which has been imported from abroad, shall give to the purchaser an invoice stating the name of the article and what are the respective percentages (if any) of nitrogen, soluble phosphates, insoluble phosphates, and potash contained in the article...
Pàgina 349 - Every person who sells for use as food for cattle or poultry any article which has been artificially prepared shall give to the purchaser an invoice stating the name of the article, and whether it...
Pàgina 282 - law of the minimum," according to which the yield of a given crop will be limited by the amount of one particular constituent of food, if applied to all the factors affecting the trees in this orchard will show that one factor alone is quite sufficient to account for the differences noted • — namely, the supply of water. The results of 128 determinations of moisture in the top foot of soil show...
Pàgina 119 - In the manufactories of glue, many hundred tons of a solution of phosphates in muriatic acid are yearly thrown away as being useless. It would be important to examine whether this solution might not be substituted for the bones.
Pàgina 139 - Whether or not superphosphate of lime owes much of its effect to its chemical actions in the soil, it is certainly true that it causes a much enhanced development of the underground collective apparatus of the plant, especially of lateral and fibrous root, distributing a complete network to a considerable distance around the plant, and throwing innumerable mouths to the surface.
Pàgina 43 - ... Christiania University and Mr. S. Eyde, a Norwegian civil engineer. It consists essentially in the production in a special furnace of an electric flame capable of causing the oxygen and nitrogen of the atmosphere to combine. In the furnace an alternating arc is produced at from 3,000 to 4,000 volts pressure. The electrodes are placed equatorially between the poles of a powerful electro-magnet, the distance between the points of the electrodes being from 1 to 2 millimetres.
Pàgina 16 - This will contain all the elements, except silicon, normally found in plant ashes, and under such conditions the plant will grow and go through its whole cycle of life, assimilating freely, producing large quantities of dry matter, setting flowers, and ripening healthy seed. Certain precautions have to be taken, but if the right conditions are assured, the growth of a plant in a water culture is perfectly normal, and may be taken, as far as the plant is concerned, as representing the course of its...