Manures and the principles of manuring

chapter contains, in a tabular form, a short epitome of some of the more

important Rothamsted researches on the action of different manures.

To the numerous German and French works on the subject, more especially to Professor Heiden's encyclopaedic 'Lehrbuch der Duengerlehre' and the various writings of Dr Emil von Wolff, the author is further much indebted.