Les, Engrais Chimiques

Abstract

THIS is a new edition of the author's lectures on chemical manures, which were first published in 1868, and which have been translated into seven languages. An English edition, by Mr. Crookes, was published in 1879. The sixth French edition has been out of print for about ten years, and during that time the price of chemical manures has considerably declined, on an average about 40 percent. On this account the author has introduced, at the end of the volume, a chapter containing new formulæ for mixed manures, based on considerations of market value and more complete knowledge of the requirements of crops. Thus, potassium chloride replaces potassium nitrate in the manure for leguminous plants, and in some cases a mixture of potassium chloride and ammonium sulphate replaces potassium nitrate; and a few other alterations are suggested in the treatment of various crops. Thomas's basic cinder is not mentioned as a source of phosphoric acid. The lectures themselves, and some controversial matter, are reprinted in their original form, and but little new matter is added.

Les, Engrais Chimiques.

Par Georges Ville. Septième Édition. (Paris: M. Engel, 1890.)