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 16
... supply , though small , is sufficient for the purposes of vegetation . It enters the plant in two ways - through the roots in the water which goes to form the sap , and at the leaves , which absorb it from the air in the form of gas ...
... supply , though small , is sufficient for the purposes of vegetation . It enters the plant in two ways - through the roots in the water which goes to form the sap , and at the leaves , which absorb it from the air in the form of gas ...
Seite 17
... supplies only carbon to the plant . It is therefore necessary that it be divided , or decomposed , and that the carbon be re- tained while the oxygen is sent off again into the atmosphere , to reperform its office of uniting with carbon ...
... supplies only carbon to the plant . It is therefore necessary that it be divided , or decomposed , and that the carbon be re- tained while the oxygen is sent off again into the atmosphere , to reperform its office of uniting with carbon ...
Seite 19
... supply , and the blue smoke issuing from the cottage - chimney , as described by so many poets , possesses a new beauty , when we reflect that besides indicating a cheerful fire on the hearth , it contains materials for making food for ...
... supply , and the blue smoke issuing from the cottage - chimney , as described by so many poets , possesses a new beauty , when we reflect that besides indicating a cheerful fire on the hearth , it contains materials for making food for ...
Seite 21
... supply oxygen except on the surface ) caused it to become melted carbon , and to flow around those bodies which still retained their shapes , changing them to coal without destroying their structures . This coal , so long as it retains ...
... supply oxygen except on the surface ) caused it to become melted carbon , and to flow around those bodies which still retained their shapes , changing them to coal without destroying their structures . This coal , so long as it retains ...
Seite 23
... supply of these materials , as their What is water composed of ? If analyzed , what does it yield ? How do plants obtain their hydrogen and oxygen ? sap is composed chiefly of water . Whenever vege- table THE PLANT . 23 -Hydrogen ...
... supply of these materials , as their What is water composed of ? If analyzed , what does it yield ? How do plants obtain their hydrogen and oxygen ? sap is composed chiefly of water . Whenever vege- table THE PLANT . 23 -Hydrogen ...
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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.