Catechism of Agricultural Chemistry and GeologyW. Blackwood, 1844 - 48 páginas |
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Página 18
... farm - yard manure or of peat compost are given to it . Q. What purpose does this organic matter serve in the soil ? A. It supplies the organic food which plants draw from the soil through their roots . Q. Do plants draw much of their ...
... farm - yard manure or of peat compost are given to it . Q. What purpose does this organic matter serve in the soil ? A. It supplies the organic food which plants draw from the soil through their roots . Q. Do plants draw much of their ...
Página 30
... farm - yard manure , or L.2 an acre . It is said , how- ever , that the clover which succeeds the corn is 30 CATECHISM OF AGRICULTURAL.
... farm - yard manure , or L.2 an acre . It is said , how- ever , that the clover which succeeds the corn is 30 CATECHISM OF AGRICULTURAL.
Página 32
... farm - yard dung - and it is in many parts of the country applied with great profit as a top - dressing to the young wheat in spring . Q. What are the most important animal manures ? A. The blood , flesh , bones , hair , wool , and the ...
... farm - yard dung - and it is in many parts of the country applied with great profit as a top - dressing to the young wheat in spring . Q. What are the most important animal manures ? A. The blood , flesh , bones , hair , wool , and the ...
Página 33
... farm - yard manure . When employed without farm - yard manure , they are often mixed with wood ashes , and drilled in with the turnip seed . Q. Would you raise all your turnip crops with bones alone ? A. No , if I raised one crop of ...
... farm - yard manure . When employed without farm - yard manure , they are often mixed with wood ashes , and drilled in with the turnip seed . Q. Would you raise all your turnip crops with bones alone ? A. No , if I raised one crop of ...
Página 38
... farm - yard ? A. I would make a large tank or cistern in or close by my farm - yard , in which I would collect it . Q. How would you use this liquid manure ? A. I would pump it back occasionally upon my dung heaps , so as to promote ...
... farm - yard ? A. I would make a large tank or cistern in or close by my farm - yard , in which I would collect it . Q. How would you use this liquid manure ? A. I would pump it back occasionally upon my dung heaps , so as to promote ...
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...