Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 sider |
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Side 33
... bones have produced re- markable benefits . Q. What do bones consist of ? A. Bones consist of glue or gelatine , which may be partly extracted by boiling them in water , and partly of bone - earth , which remains behind when bones are ...
... bones have produced re- markable benefits . Q. What do bones consist of ? A. Bones consist of glue or gelatine , which may be partly extracted by boiling them in water , and partly of bone - earth , which remains behind when bones are ...
Side 34
James Finlay Weir Johnston. Q. Does this earth of bones act as a manure ? A. Yes , because all plants contain , and ... bone - earth , and if these be carried away and sold off the farm , the land is robbed by degrees of this bone - earth ...
James Finlay Weir Johnston. Q. Does this earth of bones act as a manure ? A. Yes , because all plants contain , and ... bone - earth , and if these be carried away and sold off the farm , the land is robbed by degrees of this bone - earth ...
Side 48
... ( bone - earth ) , phosphate of magnesia , common salt , and other saline substances . The teacher may here explain more fully the com- position of this ash , by referring to his table of the com- position of the ash of different kinds of ...
... ( bone - earth ) , phosphate of magnesia , common salt , and other saline substances . The teacher may here explain more fully the com- position of this ash , by referring to his table of the com- position of the ash of different kinds of ...
Side 53
... bone - earth of the plant supplies materials for its bones , and the starch and sugar afford the carbon which is necessary for the purposes of re- spiration . Finally , he may also point out , that , when the vegetable food has ...
... bone - earth of the plant supplies materials for its bones , and the starch and sugar afford the carbon which is necessary for the purposes of re- spiration . Finally , he may also point out , that , when the vegetable food has ...
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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...