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 36
... sand , the base of flint . It is necessary for the growth of all plants , as it gives them much of their strength . In connection with an alkali it constitutes the hard shining surface of corn stalks , straw , etc. Silica unites with ...
... sand , the base of flint . It is necessary for the growth of all plants , as it gives them much of their strength . In connection with an alkali it constitutes the hard shining surface of corn stalks , straw , etc. Silica unites with ...
Seite 37
... sand - paper we may sharpen a knife upon it . This is owing to the hard particles of silica which it contains . Window glass is silicate of potash , ren- dered insoluble by additions of arsenic and litharge . Liebig tells us that some ...
... sand - paper we may sharpen a knife upon it . This is owing to the hard particles of silica which it contains . Window glass is silicate of potash , ren- dered insoluble by additions of arsenic and litharge . Liebig tells us that some ...
Seite 58
... sand , and must be united to an alkali before it can be used by the plant , because it is insoluble except when so united . Chlorine is a constituent of common salt ( chloride When plants are destroyed by combustion or decay , what be ...
... sand , and must be united to an alkali before it can be used by the plant , because it is insoluble except when so united . Chlorine is a constituent of common salt ( chloride When plants are destroyed by combustion or decay , what be ...
Seite 69
... sands of years must have been occupied in preparing the earth for habitation by man . As the inorganic or mineral part of the soil is usually the largest , we will consider it first . As we have stated that this portion is formed * In ...
... sands of years must have been occupied in preparing the earth for habitation by man . As the inorganic or mineral part of the soil is usually the largest , we will consider it first . As we have stated that this portion is formed * In ...
Seite 70
... sand which they contain , and which , to our ob- servation , form their leading characteristics . The What is the general rule concerning the composition of rocks ? Do these distinctions affect the fertility of soils formed from them ...
... sand which they contain , and which , to our ob- servation , form their leading characteristics . The What is the general rule concerning the composition of rocks ? Do these distinctions affect the fertility of soils formed from them ...
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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.