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 18
... conditions of different latitudes , which , so far as the assimilation of carbon is concerned , are much the same . At ... condition of different latitudes . Does the proportion of carbonic acid in the atmosphere remain about the same ...
... conditions of different latitudes , which , so far as the assimilation of carbon is concerned , are much the same . At ... condition of different latitudes . Does the proportion of carbonic acid in the atmosphere remain about the same ...
Seite 21
... condition . For instance , let us sup- pose that we have a certain quantity of char- coal ; this is nearly pure carbon . We ignite it , and it unites with the oxygen of the air , becomes carbonic acid , and floats away into the ...
... condition . For instance , let us sup- pose that we have a certain quantity of char- coal ; this is nearly pure carbon . We ignite it , and it unites with the oxygen of the air , becomes carbonic acid , and floats away into the ...
Seite 35
... conditions which will be hereafter explained . Another use of phosphoric acid in the plant is to supply it with a small amount of phosphorus , which seems to be required in the formation of the seed . Will soils , deficient in phosphate ...
... conditions which will be hereafter explained . Another use of phosphoric acid in the plant is to supply it with a small amount of phosphorus , which seems to be required in the formation of the seed . Will soils , deficient in phosphate ...
Seite 40
... condition to commence independent growth . It consists of roots which are located in the soil ; leaves which are spread in the air , and a stem which connects the roots and leaves . This stem con- tains sap vessels ( or tubes ) which ...
... condition to commence independent growth . It consists of roots which are located in the soil ; leaves which are spread in the air , and a stem which connects the roots and leaves . This stem con- tains sap vessels ( or tubes ) which ...
Seite 41
... condition , and then can very readily put them together . But if he has all of the wood necessary and no iron , he cannot make his cart , because bolts , nails and screws are required , and their place cannot be supplied by boards ...
... condition , and then can very readily put them together . But if he has all of the wood necessary and no iron , he cannot make his cart , because bolts , nails and screws are required , and their place cannot be supplied by boards ...
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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.