Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
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Página 3
... produced has driven out all the common air from the bottle , a light may be applied to the jet , when the gas will take fire and burn . The cork and jet may now be taken out of the bottle , and a lighted taper intro- duced into it ...
... produced has driven out all the common air from the bottle , a light may be applied to the jet , when the gas will take fire and burn . The cork and jet may now be taken out of the bottle , and a lighted taper intro- duced into it ...
Página 15
... produces carbonic acid , upon which plants live , and from this carbonic acid and water together , plants produce starch , & c . upon which animals live . Q. Woody fibre , starch , gum , and sugar consist of carbon and water only , of ...
... produces carbonic acid , upon which plants live , and from this carbonic acid and water together , plants produce starch , & c . upon which animals live . Q. Woody fibre , starch , gum , and sugar consist of carbon and water only , of ...
Página 26
... 192 Carbonic acid ( combined with 40 the lime and magnesia ) , 44 Loss , 14 4 / 1 / 1000 1000 1000 The soil , of which the composition is given in the first column , had produced crops for 100 years without ma- 26 CATECHISM OF AGRICULTURAL.
... 192 Carbonic acid ( combined with 40 the lime and magnesia ) , 44 Loss , 14 4 / 1 / 1000 1000 1000 The soil , of which the composition is given in the first column , had produced crops for 100 years without ma- 26 CATECHISM OF AGRICULTURAL.
Página 27
James Finlay Weir Johnston. column , had produced crops for 100 years without ma- nure , and still contained a sensible quantity of all the substances required by plants . That in the second co- lumn produced good crops when regularly ...
James Finlay Weir Johnston. column , had produced crops for 100 years without ma- nure , and still contained a sensible quantity of all the substances required by plants . That in the second co- lumn produced good crops when regularly ...
Página 28
... work into the hands of the practi- cal farmer , by converting into valuable produce what he lays on in the form of a worthless refuse - and how they always do most for the skilful , the prudent , 28 CATECHISM OF AGRICULTURAL.
... work into the hands of the practi- cal farmer , by converting into valuable produce what he lays on in the form of a worthless refuse - and how they always do most for the skilful , the prudent , 28 CATECHISM OF AGRICULTURAL.
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...