Excerpt from The Soil of the Farm
The improvement of the soil by drainage and irrigation, and by liming - the maintenance of its fertility by the operation of our tillage implements - its exhaustion by cropping, and its restoration by manuring - are the proper subjects of these pages. The resources of the farmer, in the economy of home manures and in the use of manufactured and imported fertilizers, are considered in detail.
Fertility of course depends not only on the soil but on the climate. And it is on the fitness of the circumstances in both these particulars that the luxuriance and prosperity of plant growth rest. The principles on which fertility is dependent may be the same in all climates. The capability of obtaining from soil and air the building material of the growing plant is everywhere its limit, but it is the climate alone which determines the vegetation in which the fertility is exhibited.
Messrs. J. B. Lawes, J. C. Morton, John Scott, and George Thurber, so eminent in their fields of labor, are the writers of these valuable pages.
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