Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
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Página 9
... proportion ? A. No. They exist in different proportions in the ash of different plants - the ash of wheat , for exam- ple , contains more phosphoric acid than that of hay , while that of hay contains more lime than the ash of wheat . II ...
... proportion ? A. No. They exist in different proportions in the ash of different plants - the ash of wheat , for exam- ple , contains more phosphoric acid than that of hay , while that of hay contains more lime than the ash of wheat . II ...
Página 13
... proportion in oat - meal , in wheaten flour , and in the flour of other kinds of grain cultivated for food . Q. What is gluten ? A. Gluten is a substance like bird - lime , which ex- ists , along with starch , in almost all plants . It ...
... proportion in oat - meal , in wheaten flour , and in the flour of other kinds of grain cultivated for food . Q. What is gluten ? A. Gluten is a substance like bird - lime , which ex- ists , along with starch , in almost all plants . It ...
Página 15
... proportion of carbonic acid it con- tains ? A. No , because new supplies of this gas are con- tinually returning into the air . Q. Whence do those supplies come ? A. They come from three sources ; first , from the breathing of animals ...
... proportion of carbonic acid it con- tains ? A. No , because new supplies of this gas are con- tinually returning into the air . Q. Whence do those supplies come ? A. They come from three sources ; first , from the breathing of animals ...
Página 17
... proportion of the soil ? A. Of peaty soils it forms sometimes three - fourths of the whole weight , but of rich and fertile soils it does not form more than from a twentieth to a tenth of the whole weight . Q. Can a soil bear good crops ...
... proportion of the soil ? A. Of peaty soils it forms sometimes three - fourths of the whole weight , but of rich and fertile soils it does not form more than from a twentieth to a tenth of the whole weight . Q. Can a soil bear good crops ...
Página 23
... proportion of the soil than they generally do of plants . Q. Do you understand , then , where plants ob- tain all the inorganic matters they contain ? A. Yes , they obtain them from the soil only . Q. Why can they not obtain them from ...
... proportion of the soil than they generally do of plants . Q. Do you understand , then , where plants ob- tain all the inorganic matters they contain ? A. Yes , they obtain them from the soil only . Q. Why can they not obtain them from ...
Palavras e frases frequentes
AGRICULTURAL CHEMISTRY ammonia animal require applied bone-earth bones burns called carbon and water carbonic acid gas CHEMISTRY AND GEOLOGY Chlorine clover common salt compost consist of carbon contain cow-dung crops cwts draining dung earth EDINBURGH employed fall to powder farm-yard manure farmer fattening fermentation fertile give gluten grass lands grow guano gypsum hydrogen inorganic kind of air large quantity leaves LECTURES ON AGRICULTURAL light lands lighted taper limestone liquid magnesia marl mixed nitrogen oats obtain oil of vitriol organic food organic matter oxide of iron oxygen gas phosphate of lime phosphoric acid plants require potash potatoes produced profit proportion pupils quicklime roots sea-weed shell sand Silica slaked smell soda soil consists sour starch straw subsoil substances sulphuric acid supply taste teacher may exhibit teacher may illustrate teacher will show turnip usually vegetable waste wheat white fumes wood woody fibre
Passagens conhecidas
Página 17 - Q. Whence is the organic part of the soil derived? A. It is derived from the roots and stems of decayed plants, and from the dung and remains of animals and insects of various kinds. Q. Does this organic part form a large proportion of the soil ? A. Of peaty soils it forms sometimes three-fourths of the whole weight; but of rich and fertile soils it does not usually form more than from a twentieth to a tenth of the whole weight. Q. Can a soil bear good crops which does not contain a considerable...