Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 sider |
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Side 25
... naturally barren . Q. Are any soils known to exist which are natu- rally barren or naturally fertile ? A. Yes ; some large tracts of country which have CHEMISTRY AND GEOLOGY . 25.
... naturally barren . Q. Are any soils known to exist which are natu- rally barren or naturally fertile ? A. Yes ; some large tracts of country which have CHEMISTRY AND GEOLOGY . 25.
Side 26
... naturally barren . Q. How is the natural difference between such soils explained ? A. In the fertile soils all those inorganic substan- ces exist , which our cultivated crops require ; in the barren soils some of these substances are ...
... naturally barren . Q. How is the natural difference between such soils explained ? A. In the fertile soils all those inorganic substan- ces exist , which our cultivated crops require ; in the barren soils some of these substances are ...
Side 27
... naturally fertile , be ren- dered barren by continued cropping ? A. Yes , if the same kind of cropping be carried on for a long time , the land will gradually become less and less productive . Q. How is this explained ? A. Every crop ...
... naturally fertile , be ren- dered barren by continued cropping ? A. Yes , if the same kind of cropping be carried on for a long time , the land will gradually become less and less productive . Q. How is this explained ? A. Every crop ...
Side 36
... naturally ? A. It is produced in fermenting compost or ma nure heaps , and in fermenting urine , and it is the cause of the smell perceived in hot stables . Q. How can you detect the presence of this am- 36 CATECHISM OF AGRICULTURAL.
... naturally ? A. It is produced in fermenting compost or ma nure heaps , and in fermenting urine , and it is the cause of the smell perceived in hot stables . Q. How can you detect the presence of this am- 36 CATECHISM OF AGRICULTURAL.
Side 46
... naturally dry land , than upon wet land . Q. Would you apply lime in large doses at long intervals , or in small doses at shorter intervals ? A. If I applied a large dose of lime at the begin- ning of my lease , I would apply smaller ...
... naturally dry land , than upon wet land . Q. Would you apply lime in large doses at long intervals , or in small doses at shorter intervals ? A. If I applied a large dose of lime at the begin- ning of my lease , I would apply smaller ...
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...