Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 sider |
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Side
... grown at home for our increasing population . But the pro- duce can be largely increased only by the applica- tion of increased knowledge to the culture of the soil ; -and it is the rising generation now under your [ iv ] care which ...
... grown at home for our increasing population . But the pro- duce can be largely increased only by the applica- tion of increased knowledge to the culture of the soil ; -and it is the rising generation now under your [ iv ] care which ...
Side
... grow where only one grew before . " I have the honour to be , GENTLEMEN , Your obedient Servant , JAMES F. W. JOHNSTON . EDINBURGH , 1st February 1844 . ADVERTISEMENT . THE Author believes that the country teacher who.
... grow where only one grew before . " I have the honour to be , GENTLEMEN , Your obedient Servant , JAMES F. W. JOHNSTON . EDINBURGH , 1st February 1844 . ADVERTISEMENT . THE Author believes that the country teacher who.
Side 1
... grow , and of the manures which he applies to the land . I. OF THE NATURE OF THE CROPS HE RAISES . Q. Of what parts do all vegetable substances con- sist ? A. All vegetable substances consist of two parts , one which burns away in the ...
... grow , and of the manures which he applies to the land . I. OF THE NATURE OF THE CROPS HE RAISES . Q. Of what parts do all vegetable substances con- sist ? A. All vegetable substances consist of two parts , one which burns away in the ...
Side 9
... grow . Q. Where do plants obtain their food ? A. They obtain it partly from the air and partly from the soil . Q. How do they take in their food ? A. They take it in by their leaves from the CHEMISTRY AND GEOLOGY . 9.
... grow . Q. Where do plants obtain their food ? A. They obtain it partly from the air and partly from the soil . Q. How do they take in their food ? A. They take it in by their leaves from the CHEMISTRY AND GEOLOGY . 9.
Side 10
... grow . Q. In what form do plants take in organic food from the air ? A. In the form chiefly of carbonic acid gas . Q. What is carbonic acid gas ? A. It is a kind of air , which has no colour , but has a peculiar smell . Burning bodies ...
... grow . Q. In what form do plants take in organic food from the air ? A. In the form chiefly of carbonic acid gas . Q. What is carbonic acid gas ? A. It is a kind of air , which has no colour , but has a peculiar smell . Burning bodies ...
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...