Elementary Lessons in the Science of Agricultural Practice |
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Page 16
... acid . These two gases - for they are as colourless and transparent as air are found to help each other very much ; and they not only attack metals , such as the bright mould - board we have referred to , but they attack rocks , however ...
... acid . These two gases - for they are as colourless and transparent as air are found to help each other very much ; and they not only attack metals , such as the bright mould - board we have referred to , but they attack rocks , however ...
Page 17
... acid of the atmosphere , just as happened in the case of the iron mould board of the plough , and after a time we see on the face of the granite a rusty mark . This rusty mark has been caused by the rain - water removing the rust formed ...
... acid of the atmosphere , just as happened in the case of the iron mould board of the plough , and after a time we see on the face of the granite a rusty mark . This rusty mark has been caused by the rain - water removing the rust formed ...
Page 29
... acid or some organic acid . This solution of plant - food is assisted by the functions of vegetable life , especially as manifested by the minute rootlets in their search for food . Thus water aided by these weak acids is the vehicle by ...
... acid or some organic acid . This solution of plant - food is assisted by the functions of vegetable life , especially as manifested by the minute rootlets in their search for food . Thus water aided by these weak acids is the vehicle by ...
Page 30
... acid solution ) as plant - food . This also is the active portion of the soil , which we have already distin- guished from the insoluble or dormant matter . It is a matter of great importance to the cultivator of the soil to inform ...
... acid solution ) as plant - food . This also is the active portion of the soil , which we have already distin- guished from the insoluble or dormant matter . It is a matter of great importance to the cultivator of the soil to inform ...
Page 32
... acid in the air , assisted by water and frost . In the second case no effort was made to let these agencies effect the same changes , but as the earth lay in its solid bed , and probably with water stand- ing upon it , it was really ...
... acid in the air , assisted by water and frost . In the second case no effort was made to let these agencies effect the same changes , but as the earth lay in its solid bed , and probably with water stand- ing upon it , it was really ...
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Elementary Lessons in the Science of Agricultural Practice (1881) Henry Tanner No preview available - 2008 |
Common terms and phrases
acre advantages Agricultural Science alumina ammonia animal arising atmosphere become Cambridge carbonic acid chalk CHAPTER character chemical clay climate clover composition contain corn Crown 8vo cultivation decay desirable dormant matter double silicates duty ELEMENTARY TREATISE English Eton College Extra fcap fact farm farm-yard manure farmer favourable feeding fermentation fertilising matter fertility flesh-forming frost Greek green manures growing crop grown growth Hence herbage HISTORY important influence irrigation J. P. MAHAFFY John's College land late Fellow LATIN LESSONS marl materials mechanical condition mineral matter moisture necessary nitrogenous nitrogenous matter numerous Illustrations oats organic matter Owens College phosphate phosphoric acid plant plant-food ploughed portion potash practice preparation produced Professor quantity R. C. JEBB rendered revised rocks roots sand School secure seed silicates soil soluble straw substances success superphosphate supply surface takes place tillage tion Trinity College turnips valuable wheat whilst wurzel
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