Elements of Agricultural Chemistry and Geology

W. Blackwood, 1852 - 410 páginas

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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 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.

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