The Elements of Agriculture: A Book for Young Farmers, with Questions Prepared for the Use of SchoolsD. Appleton, 1854 - 288 Seiten |
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Seite 12
... obtained from air . The inorganic matter has become earth , and was obtained from the soil . This knowledge can do us no good except by the assistance of chemistry , which explains the proper- ties of each part , and teaches us where it ...
... obtained from air . The inorganic matter has become earth , and was obtained from the soil . This knowledge can do us no good except by the assistance of chemistry , which explains the proper- ties of each part , and teaches us where it ...
Seite 14
... obtain as a result simply oxygen and hydrogen , or we can combine these two gases and thus form pure water ; oxygen ... obtained from matters existing in the atmosphere which sur- rounds our globe , we will examine its constitution ...
... obtain as a result simply oxygen and hydrogen , or we can combine these two gases and thus form pure water ; oxygen ... obtained from matters existing in the atmosphere which sur- rounds our globe , we will examine its constitution ...
Seite 17
... obtain about one - third of their carbon . Carbonic acid , it will be recollected , consists of carbon and oxygen , while it supplies only carbon to the plant . It is therefore necessary that it be divided , or decomposed , and that the ...
... obtain about one - third of their carbon . Carbonic acid , it will be recollected , consists of carbon and oxygen , while it supplies only carbon to the plant . It is therefore necessary that it be divided , or decomposed , and that the ...
Seite 22
... obtained by decomposing the car- Give an instance of such change . How do plants and animals benefit each other ? Describe the experiment with the glass tube . bonic acid by drawing the wires a short distance apart 22 THE PLANT .
... obtained by decomposing the car- Give an instance of such change . How do plants and animals benefit each other ? Describe the experiment with the glass tube . bonic acid by drawing the wires a short distance apart 22 THE PLANT .
Seite 23
... obtain a wafer of charcoal of the same weight as the piece introduced . In this experiment we have changed carbon from its solid form to an invisible gas and back again to a solid , thus fully representing the continual changes of this ...
... obtain a wafer of charcoal of the same weight as the piece introduced . In this experiment we have changed carbon from its solid form to an invisible gas and back again to a solid , thus fully representing the continual changes of this ...
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Häufige Begriffe und Wortgruppen
absorbent agricultural alkali ammonia amount analysis animal manures applied ashes become bones burning bushels carbonic acid causes CHAPTER character charcoal chemical chloride of lime chlorine clay compost compound condition consists constituents cultivation decay decomposed decomposition deficient deposited depth drains dung earth effect escape evaporation excrements farmer farming fertilizing gases fertilizing matter grain growth guano heap heat hydrogen important improved inches ingredients inorganic kinds land large quantities leaching lime and salt liquid manure magnesia Mapes mechanical mechanical character mineral manures mineral matter moisture mulching necessary night soil nitric acid nitrogen nure obtain organic manures organic matter oxygen particles phosphate of lime phosphoric acid plaster potash prepared muck prevent produce pulverized rains removed render roots of plants salt mixture sand silica slaked slaked lime soda soils contain soluble straw sub-soil plow substances sufficient sulphuric acid super-phosphate of lime supply surface soil tain tion under-draining valuable weeds
Beliebte Passagen
Seite 148 - It is not necessary that*-4his and the foregoing table should be learned by the scholar, but they will be found valuable for reference by the farmer. MANURES. Example 1. — Required, the number of loads necessary to manure an acre of ground, dividing each load into six heaps, and placing them at a distance of 44 yards from each other ? The answer by the table is 39f . Example 2.
Seite 235 - ... the sub-soil plow, by passing through it, opens a passage for water, and often affords a sufficient drainage. If plants will grow better on a soil six inches deep than on one of three inches, there is no reason why they should not be benefited in proportion, by disturbing the soil to the whole depth to which roots will travel—even to a depth of two feet.