Elements of Agricultural Chemistry and GeologyW. Blackwood, 1852 - 410 páginas |
No interior do livro
Resultados 1-5 de 89
Página ix
... nitrogen . - Relative proportions of these elementary bodies contained in plants and animals . — Meaning of chemical combina- tion and chemical decomposition . CHAPTER II . Forms in which the organic elements , carbon , hydrogen ...
... nitrogen . - Relative proportions of these elementary bodies contained in plants and animals . — Meaning of chemical combina- tion and chemical decomposition . CHAPTER II . Forms in which the organic elements , carbon , hydrogen ...
Página xii
... nitrogen required by the wheat crop . - Carbonates , nitrates , and silicates of potash and soda.- Sulphates of potash and soda . - Common salt . - Sulphate of magnesia.- Sulphate of iron . - Gypsum . - Use of the phosphate and super ...
... nitrogen required by the wheat crop . - Carbonates , nitrates , and silicates of potash and soda.- Sulphates of potash and soda . - Common salt . - Sulphate of magnesia.- Sulphate of iron . - Gypsum . - Use of the phosphate and super ...
Página 1
... nitrogen . - Relative pro- portions of these elementary bodies contained in plants and animals . -Meaning of chemical combination and chemical decomposition . THE object of the practical farmer is to raise from a given extent of land ...
... nitrogen . - Relative pro- portions of these elementary bodies contained in plants and animals . -Meaning of chemical combination and chemical decomposition . THE object of the practical farmer is to raise from a given extent of land ...
Página 9
... nitrogen . It usually con- tains also a minute proportion of sulphur and phosphorus . Of these , carbon , sulphur , and phosphorus are solid substances ; while hydrogen , oxygen , and nitrogen are gases , or peculiar kinds of air ...
... nitrogen . It usually con- tains also a minute proportion of sulphur and phosphorus . Of these , carbon , sulphur , and phosphorus are solid substances ; while hydrogen , oxygen , and nitrogen are gases , or peculiar kinds of air ...
Página 12
... is entirely consumed . In this respect it differs both from hydrogen and from common air . If a living animal is introduced into this gas , its circulation and its breathing PREPARATION OF NITROGEN . 13 become quicker - it is.
... is entirely consumed . In this respect it differs both from hydrogen and from common air . If a living animal is introduced into this gas , its circulation and its breathing PREPARATION OF NITROGEN . 13 become quicker - it is.
Índice
| 1 | |
| 18 | |
| 29 | |
| 37 | |
| 58 | |
| 81 | |
| 89 | |
| 101 | |
| 186 | |
| 208 | |
| 226 | |
| 237 | |
| 247 | |
| 263 | |
| 278 | |
| 297 | |
| 115 | |
| 130 | |
| 149 | |
| 164 | |
| 174 | |
| 308 | |
| 325 | |
| 344 | |
| 371 | |
| 392 | |
Outras edições - Ver tudo
Elements of Agricultural Chemistry and Geology James Finlay Weir Johnston Visualização integral - 1855 |
Palavras e frases frequentes
abound acre agricultural ammonia animal applied arable barley bones burned bushels carbonic acid cent chalk chemical chiefly clay composition consists contain crops decay dissolved districts drains dung effect farmer farmyard manure fermentation fertilising fertility fibre geology gluten grain grass green grow growth guano gypsum Hence improvement inorganic kind land leaves less limestone liquid magnesia milk mineral mixed mixture natural nearly nitrate nitrate of soda nitric acid nitrogen oats organic food organic matter oxide of iron oxygen pasture peat phosphate phosphate of lime phosphoric acid plants ploughing portion potash potato practical produce proportion protein compounds quantity rains readily rich rocks roots saline matter saline substances salt sand sandstone sandy SECTION seed silica soda soil solid soluble starch straw subsoil sugar sulphate sulphuric acid supply surface tain tion top-dressing turnip urine vegetable matter weight wheat yield
Passagens conhecidas
Página 377 - SYSTEM OF DRAINING: A Systematic Treatise on the Theory and Practice of Draining Land, adapted to the various Situations and Soils of England and Scotland, drawn up from the Communications of Joseph Elkington, by J. JOHNSTONE.
Página 382 - We have thoroughly examined these volumes ; but to give a full notice of their varied and valuable contents would occupy a larger space than we can conveniently devote to their discussion ; we therefore, in general terms, commend them to the careful study of every young man who wishes to become a good practical farmer.— Times.
Página 377 - THE PLANTER'S GUIDE. By SIR HENRY STEUART. A New Edition, with the Author's last Additions and Corrections. 8vo, with Engravings, 21s. STABLE ECONOMY: A Treatise on the Management of Horses.
Página 377 - JG MULDER, Professor of Chemistry in the University of Utrecht With an Introduction and Notes by Professor JOHNSTON. 22 Plates.
Página 217 - Johnstone remarks (Ag. f' it fin., p. 170), the amount of nitrogen present in each of the organic manures affords one of the readiest and most simple tests by which their relative agricultural values, compared with those of vegetable matters and with each other, can be pretty nearly estimated. In reference to their relative quantities of nitrogen, therefore, they have been arranged in the following order, the number opposite to each representing the weight in Ibs. which is equivalent to or would...
Página 377 - TO PURCHASERS OF HORSES. Being a short and . familiar Treatise on the internal formation of the Horse ; the nature of Soundness and Unsoundness ; and the Laws relating to Sale and Warranty ; with Copious Directions for discovering Unsoundness prior to Purchasing. By the same Author. A New Edition, 18mo, 2s.
Página 378 - THE JOURNAL OF AGRICULTURE, and the TRANSACTIONS of the HIGHLAND and AGRICULTURAL SOCIETY of SCOTLAND. Published Quarterly.
Página 41 - When a seed is committed to the earth, if the warmth and moisture are favorable it begins to sprout. It pushes a shoot upwards, it thrusts a root downwards ; but until the leaf expands and the root has fairly entered the soil, the young plant derives no nourishment other than water, either from the earth or from the air. It lives on the starch and gluten contained in the seed.
Página 73 - ... in vegetable matter, leave no more than 10 of clay when treated in this manner, it is called a sandy soil; if from 10 to 40, a sandy loam; if from 40 to 70, a loamy soil; if from 70 to 85, a clay loam ; from 85 to 95, a strong clay soil; and when no sand is separated at all by this process, it is a pure agricultural clay.
Página 382 - Mr Stephens has tasked himself to produce a great work— the most splendid we possess on the subject; and his title hardly conveys the full extent of his plan, which is more comprehensive and highly finished than any other rural cyclopaedia we Bell's Messenger.