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 11
... is the object of cultivating the soil ? What is necessary in order to cultivate with economy ? Are plants created from nothing ? ters , and discharge from their roots those substances that THE PLANT . 11 PAGE 29 40 43 52 56 -Introduction,
... is the object of cultivating the soil ? What is necessary in order to cultivate with economy ? Are plants created from nothing ? ters , and discharge from their roots those substances that THE PLANT . 11 PAGE 29 40 43 52 56 -Introduction,
Seite 12
... necessary for farmers to become chemists . All that is required is , that they should What must we do to learn the composition of plants ? What takes place when vegetable matter is burned ? What do we call the two divisions produced by ...
... necessary for farmers to become chemists . All that is required is , that they should What must we do to learn the composition of plants ? What takes place when vegetable matter is burned ? What do we call the two divisions produced by ...
Seite 13
... necessary to an understanding of the practical operations of cultiva- tion , etc. We will first examine the organic part of plants , or that which is driven away during combustion or burning . This matter , though apparently lost , is ...
... necessary to an understanding of the practical operations of cultiva- tion , etc. We will first examine the organic part of plants , or that which is driven away during combustion or burning . This matter , though apparently lost , is ...
Seite 17
... 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 . This decomposition takes place in the green What ...
... 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 . This decomposition takes place in the green What ...
Seite 18
... necessary that the sun shine directly on the leaf or green shoot , but this causes a more rapid decomposition of carbonic acid , and conse- quently we find that plants which are well exposed to the sun's rays make the most rapid growth ...
... necessary that the sun shine directly on the leaf or green shoot , but this causes a more rapid decomposition of carbonic acid , and conse- quently we find that plants which are well exposed to the sun's rays make the most rapid growth ...
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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.