Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
No interior do livro
Resultados 6-10 de 10
Página 27
... proportion of some one , such as oxide of iron , which in great quan- tity is injurious to the soil . Q. How would you improve a soil of this kind ? A. I would thorough - drain and subsoil it , that the rains might sink through it and ...
... proportion of some one , such as oxide of iron , which in great quan- tity is injurious to the soil . Q. How would you improve a soil of this kind ? A. I would thorough - drain and subsoil it , that the rains might sink through it and ...
Página 35
... proportion of that which would otherwise cause it to ferment . Q. In what respect does the mixed dung of ani- mals differ from the food on which they live ? A. It differs principally in containing a less pro- portion of carbon , and a ...
... proportion of that which would otherwise cause it to ferment . Q. In what respect does the mixed dung of ani- mals differ from the food on which they live ? A. It differs principally in containing a less pro- portion of carbon , and a ...
Página 36
... proportion of nitrogen the cause of the greater activity of the dung of animals ? A. Yes , it is the principal cause . Q. What form does this nitrogen assume during the fermentation of animal manures ? A. It assumes , for the most part ...
... proportion of nitrogen the cause of the greater activity of the dung of animals ? A. Yes , it is the principal cause . Q. What form does this nitrogen assume during the fermentation of animal manures ? A. It assumes , for the most part ...
Página 47
... proportion of each of these usually ex- ists in wheat ? A. 100 lbs . of wheat flour contain about 50 lbs . of starch , 10 lbs . of gluten , and 2 or 3 lbs . of oil . Q. In what proportion do they exist in oats ? A. 100 lbs . of oats ...
... proportion of each of these usually ex- ists in wheat ? A. 100 lbs . of wheat flour contain about 50 lbs . of starch , 10 lbs . of gluten , and 2 or 3 lbs . of oil . Q. In what proportion do they exist in oats ? A. 100 lbs . of oats ...
Página 48
... proportions of starch , gluten , & c . always the same in the same grain or root ? A. No. Some varieties of wheat contain more gluten than others , some varieties of oats more oil than others , and some varieties of potatoes more starch ...
... proportions of starch , gluten , & c . always the same in the same grain or root ? A. No. Some varieties of wheat contain more gluten than others , some varieties of oats more oil than others , and some varieties of potatoes more starch ...
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...